Compact. performance. Threaded Safety Relief Valves. Series 437 Type Series 459 Type CATALOG.

Compact performance Threaded Safety Relief Valves Series 437 Type 437 438 439 Series 459 Type 459 46 CATALOG The Safety Valve

Series 459 Packed lever H4 Series 459 Balanced bellows design Series 459 Cap H Series 459 Flanged version Series 459 Plain lever H3

Contents Contents General Applications 5 Features and Benefits 5 Codes and Standards 5 Overview 6 Series 437 9 Materials 0 How to Order Numbering System Article Numbers 4 Available Connections 5 Dimensions and Weights 6 Pressure Temperature Ratings 8 Accessories and Options Caps and Levers 0 Metal Seat Soft Seal Heating Jacket 4 Spare Parts 5 Approvals Series 437 7 Capacities Type 437 8 Capacities Type 438 / 439 30 Specification Sheet 3 Series 459 33 Materials 34 How to Order Numbering System 40 Article Numbers 4 Available Connections 43 Dimensions and Weights 44 Pressure Temperature Ratings 46 Accessories and Options Caps and Levers 48 Balanced Bellows 50 Metal Seat 5 Soft Seal 5 Heating Jacket 54 Lift Indicator 55 Spare Parts 56 Approvals Series 459 58 Capacities Series 459 59 Specification Sheet 6 Series 437 Cap H Series 437 Packed lifting device H4 Series 437 Flanged version LWN 47.0 3

General LESER s compact performance valves are spring loaded safety relief valves of specially compact design, developed in close cooperation with plant engineers and service specialists to protect special processes and installations against overpressure. Extensive testing at the LESER ASMEcertified test lab together with up to date manufacturing processes ensure LESER s compact performance valves are designed and manufactured to highest standards and compliant with and approved according to ASME (Sec. VIII, Div. ), the Canadian CRN, the European PED standard (CE), the German AD 000- Merkblatt A and those of many other countries, covering requirements from end-users, OEM s and engineering companies worldwide. the reliability of these state of the art products. Type 437 / 438 / 439 Type 459 / 46 4 LWN 47.0

Applications Features and Benefits Codes and Standards Applications LESER s compact performance valves represent the ultimate solution for critical applications such as Air/gas compressors and pumps Technical gases and CO plants Chemical equipment and piping Pressure vessels and piping systems containing gas, air, liquid or steam LPG/LNG terminals, carriers etc. Cryogenic systems and oxygen application Thermal relief Features and Benefits LESER s compact performance valves cover a large variety of types, materials and options to fit any application: Scope of Design Four valve sizes from / through / Four orifice sizes from 0.3*D through F Threaded or flanged connections ANSI or DIN, Inlet rating: class 50# to 500# Standard metal sealing: Type 437 and Type 459 or Soft seal: Type 438, 439 and 46 Optional stainless steel bellows for back pressure compensation Packed or plain lifting lever or gastight cap Heating jacket available for high viscosity fluids Compact design and High Performance Single trim for steam, gas and liquid for less spare parts and easier maintenance Broad set pressure range up to 600 psig Self-draining body design, avoids residues and reduces corrosion One-piece spindle reduces friction Unobstructed seat bore for maximum capacity compared to nominal size Heavy duty design Type 459M Various materials: chrome steel, stainless steel, Monel or Hastelloy All parts machined from bar stock for complete valves from special materials within short time Variety of capacities and versions, multiple choice of connections to fit any application Ease of plant design, installation, operation and maintenance Replaceable nozzle and disc Hardened or optional stellited metal sealing for longer product life Soft seat for superior tightness Ringless design, no adjustments Codes and Standards LESER s compact performance valves comply with the following codes and standards: ASME Section VIII National Board certified capacities (single trim for steam, gas and liquid service): UVstamp ASME Section II - materials ASME B 6.34 and ASME B6.5 API 57, NACE MR 075 CRN EN ISO 46- PED 97/3/EC (CE-marking), VdTUEV-SV 00, AD 000-Merkblatt A Others LWN 47.03 5

General Overview Overview Series 437 Series 459 Type 437: Metal to metal seat Type 438: Soft seal, o-ring Type 439: Soft seal, vulcanized Common Features Very compact design Medium capacity Two standard body materials: chrome steel, stainless steel All parts machined from bar stock various material options available Various connections The diagram gives a quick overview about the main features of LESER s compact performance valves: capacity and tightness. Type 459: Metal to metal seat Type 46: Soft seal, o-ring Common Features Compact design High capacity compared to nominal sizes: for most common valve size 3/4 x up to.5*d-orifice capacity Four different orifice sizes available Wide range of set pressures Optional balanced bellows Three body materials: cast iron, carbon steel, stainless steel Various connections Tightness Series 437 Series 459 Type 439 Vulcanized soft seal Type 438 Type 437 O-ring disc Sealing plate Type 46 Type 459 O-ring disc Sealing plate Type 437 Metal to metal Type 459 Metal to metal Capacity / Selection of Threaded Safety Relief Valves Set Pressure Criteria > 700psig > 6000psig D F 437 459 Flanged SRV 437 438 439 459 46 e.g. 56 High Flow Capacity is required Thermal Expansion application Soft Seats Metal Seats Temperature > 536 F Temperature < -50 F Variable Back Pressure occurs Threaded Connections are required Flanged Connections are required Note: Disc with sealing plate (e.g. PTFE) is available. Series Type 6 LWN 47.04

General Overview Metal to metal seat Type 437 and 459 provide for the protection of installations where the metal to metal seat with its wide temperature range and good chemical resistance is suitable. Set Pressure [psig] Type 437 and 459 can be equipped with an optional sealing plate disc for low temperature soft seat applications. 459 0.044 inch 459 0.099 inch 437 Long Version 0. inch 437 Standard Version 0. inch 459 0.06 inch 459 0.373 inch Capacity/ Metal to metal seat Type 437 Capacity Set pressure Sealing Design 0.5*D up to 60 psig metal to metal very compact Type 459 Capacity Set pressure Sealing Design 0.3*D through F up to 600 psig metal to metal compact, optional bellows, heavy duty design 459M LWN 47.05 7

General Overview Soft seal Type 438, 439 and 46 provide for the protection of installations where a soft seat for superior tightness is required like for hard to hold gases. Type 439 allows maintained tightness close to the set pressure especially at lower set pressures due to the advanced design of the vulcanized soft seat. Set Pressure [psig] 46 0.099 inch 438 Long Version 0. inch 438 Standard Version 0. inch 439 0. inch 46 0.06 inch 46 0.373 inch Capacity/ Soft seal Type 438 Capacity Set pressure Sealing Design 0.5*D up to 60 psig soft seal, O-ring very compact Type 439 Capacity Set pressure Sealing Design 0.5*D up to 3 psig vulcanized soft seal very compact Type 46 Capacity Set pressure Sealing Design 0.75*D through F up to 5075 psig soft seal, O-ring compact, optional bellows 8 LWN 47.06

Series 437 Series 437 Type 437 / 438 / 439 Type 437 / 438 / 439 Flanged Version LWN 47.07 9

Series 437 Threaded Safety Relief Valves Spring Loaded Materials Type 437 Materials Type 437 40 Item Part Name Type 4373 Chrome Steel Type 4374 Stainless Steel 8 9 Inlet body SA 479 Outlet body SA 479 430 7 Disc Hardened stainless steel Spindle AISI 40 6 / 7 Spring plate AISI 430F SA 479 SA 479 8 Adjusting screw AISI 430F with bushing PTFE PTFE 9 Lock nut Steel 40 Cap H Steel 54 57 Spring Pin Stainless steel Stainless steel Stainless steel Stainless steel 6 Ball Hardened stainless steel 36 Flanged Version 6 54 7 57 6 7 Inlet body SA 479 SA 479 Outlet body SA 479 430 SA 479. Outlet adaptor. Outlet flange 48 Inlet flange Type 437 40 8 9.. 6 54 7 57 6 7 48 Type 437 Flanged version 0 LWN 47.08

Materials Type 438 Type 439 Materials Type 438 Type 439 Item Part Name Type 4383 Type 4393 Chrome Steel Inlet body SA 479 Outlet body SA 479 430 7 Disc with soft seal Spindle AISI 40 6 / 7 Spring plate AISI 430F Type 4384 Type 4394 Stainless Steel SA 479 SA 479 8 Adjusting screw AISI 430F with bushing PTFE PTFE 9 Lock nut Steel 40 Cap H Steel 54 Spring Stainless steel Stainless steel 57 Pin Stainless steel Stainless steel 6 Ball Hardened stainless steel 36 40 8 9 6 54 7 Flanged Version Inlet body SA 479 SA 479 Outlet body SA 479 430 SA 479. Outlet adaptor. Outlet flange 48 Inlet flange Notes: CR Neoprene NBR Nitrile EPDM Ethylene / Propylene FPM Fluorocarbon FFKM Kalrez (Type 438) ISOLAST (Type 439) Type 438 O-ring seal 40 8 Item 7 only Type 439.. 6 7 57 54 7 6 7 48 Type 439 Vulcanized soft seal Type 438 Flanged version LWN 47.09

Series 437 Threaded Safety Relief Valves Spring Loaded How to Order Numbering System How to Order Numbering System 3 Article Number Set Pressure Connections 3 4 437 4. 34 Type 437 / 438 / 439 Please state unit (in gauge)! Please do not exceed pressure range mentioned in the spring charts. Please refer to table Available Connections on page 5. Please state one option code for each, inlet and outlet. Types of sealing Metal seat Metal-to-metal Metal-to-metal stellited Soft seat EPDM NBR CR FFKM (Kalrez ) FKM (Viton ) Plastic seat SP Vespel-SP PCTFE Kel-F PTDE-FDA Teflon 437 Type 438 439 3 4 Material Code 3 Body Material Chrome Steel 4 Body Material Stainless Steel Valve Code Identifies valve size, body material and orifice, refer to page 4. Code for lifting device Screwed cap H 4 Packed lever H4 4374.34 00 psig V6 V7 Article No. Set Pressure Connections LWN 47.0

How to Order Numbering System 4 5 6 Options Documentation Code and Medium Type 437 / 438 / 439 Inlet body stellited (Type 437 only) Option Code L0 Soft seal material (Type 438 / 439 only) NBR N J30 EPDM F J CR K J FKM L J3 FFKM C J0 Heating jacket H9 Please select requested documentation: Material test certificate DIN EN 004-3. Parts Inlet body Outlet body Bonnet Cap/ lever cover Disc Option Code H0 L34 L30 L3 L3. Code. ASME Section VIII. CE / VdTUEV 3. ASME Section VIII + CE / VdTUEV Medium. Gases. Liquids.3 Steam.0 Steam/ Gases/ Liquids (valid only for CE / VdTUEV) L0 H0 L30. Options Documentation Code and Medium LWN 47. 3

Series 437 Threaded Safety Relief Valves Spring Loaded How to order Article Numbers How to order Article Numbers Type 437 Type [Inch ] Set Pressure Range [psig] Body Material Chrome Steel SA 479 430 Cap H Packed Lever H4 Set Pressure Range [psig] Body Material Stainless Steel SA 479 Cap H Packed Lever H4 Type 437 standard version 0..5-348 4373.60 4373.604.5-986 4374.34 4374.344 Type 437 349-60 4373.6 4373.64 987-60 4374.35 4374.354 long version Article Numbers Type 438 Type [Inch ] Set Pressure Range [psig] Body Material Chrome Steel SA479 430 Cap H Packed Lever H4 Set Pressure Range [psig] Body Material Stainless Steel SA 479 Cap H Packed Lever H4 Type 438 standard version 0. 7-348 4383.86 4383.864 7-986 4384.98 4384.984 Type 438 349-60 4383.87 4383.874 987-60 4384.99 4384.994 long version Article Numbers Type 439 Type [Inch ] Set Pressure Range [psig] Body Material Chrome Steel SA479 430 Cap H Packed Lever H4 Set Pressure Range [psig] Body Material Stainless Steel SA 479 Cap H Packed Lever H4 Type 439 standard version 0..5-3 4393.88 4393.884.5-3 4394.89 4394.894 Note: The long version is a high pressure version with extended outlet body. 4 LWN 47.

How to Order Available Connections Available Connections Threaded ASME ANSI B.0. Inlet Outlet Male NPT Female NPT Female NPT Size Option Code Size Option Code Size Option Code / V6 / V58 / V70 3 /4 V6 3 /4 V59 3 /4 V77 V63 V60 V7 Male thread Available Connections Flanged ASME ANSI B6.5 Size / 3 /4 Inlet ANSI-Class Option Code 50 V0 300 600 900 500 V0 V03 500 V04 50 V05 300 600 V06 900 500 V07 500 V08 50 V09 300 600 V0 900 500 V 500 V Size / 3 /4 Notes: Maximum inlet flange class: #500 Extended center to face dimension outlet: 4 3 /4 (0 mm) Outlet ANSI-Class Option Code 50 V4 300 600 V3 900 V4 50 V5 300 600 V6 900 V7 50 V8 300 600 V9 900 V0 Female thread Different sizes and flange classes inlet and outlet can be combined. Standard flange facing is raised face (RF) according to ASME ANSI B6.5. RJ flange facing as well as other facings are available. Flanged version LWN 47.3 5

Series 437 Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Threaded / Flanged Connections US Units a s b s Male thread Female thread Flanged version Dimensions and Weights Threaded Connections US Units Connection Size [Inch] / x / / x 3 /4 3 /4 x 3 /4 3 /4 x x Note: only Type 437 / 438 [Inch ] 0. Center to Face [Inch] Height [Inch] Weight [lbs] Inlet Outlet Standard Long Version Male Female a c a b H max. H max. m 9 /64 55 /64 3 /4 3 /6 8 35 /64 9 3 /8 9 /64 55 /64 3 /4 7 /6 8 35 /64 9 3 /8 9 /64 55 /64 3 /4 7 /6 8 35 /64 9 3 /8 3.5 5 /64 55 /64 53 /64 7 /6 8 /3 9 3 /64 3 /64 /8 53 /64 7 /6 8 3 /6 9 4 /64 Dimensions and Weights Flanged Connections US Units Connection Size [Inch] Notes: only Type 437 / 438 for / ANSI 50: 3 5 /6 [Inch ] Center to Face [Inch] inlet a outlet b Class 50 s Flange Thickness [Inch] Class 300 / 600 s Class 900/ 500 s / /6 5 /6 3 /4 0. 4 3 /64 3 5 /6 /6 /4 3 /4 /8 9 /6 Class 500 s 7 /6 9 /6 5 /8 Standard H max. Height [Inch] Long Version H max. Weight [lbs] m 0 7 /6 7 /64 5.5 6 LWN 47.4

Dimensions and Weights Threaded / Flanged Connections Metric Units Dimensions and Weights Threaded Connections Metric Units Connection Size [Inch] / x / / x 3 /4 3 /4 x 3 /4 3 /4 x x Note: only Type 437 / 438 [mm ] 78.5 Center to Face [mm] Height [mm] Weight [kg] Inlet Outlet Standard Long Version Male Female a c a b H max. H max. m 33 44.5 30 95 6 33 44.5 37 95 6 33 44.5 37 95 6.6 36 46.5 37 98 9 35 7 46.5 37 97 8 Dimensions and Weights Flanged Connections Metric Units Connection Size [Inch] / 3 /4 [mm ] Center to Face [mm] inlet a outlet b Class 50 s Flange Thickness [mm] Class 300 / 600 s Class 900 / 500 s 33 3 7 5 78.5 03 00 7 5 9 8 39 Class 500 s 37 39 4 Standard H max. Height [mm] Long Version H max. Weight [kg] 65 86 7 m Notes: only Type 437 / 438 for / ANSI 50: 00 mm LWN 47.5 7

Series 437 Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings Type 437 / 438 / 439 US Units Pressure Temperature Ratings Type 437 US Units Valve Size Set Pressure Range [psig] [Inch ] Body Material Standard Version Long Version Temperature Range according to ASME [ F] / 0. min. max. min. max. min. max. Chrome Steel.5 348 349 60-0 + 48 / 0. Stainless Steel.5 986 987 60-450 + 536 Pressure Temperature Ratings Type 438 US Units Valve Size Set Pressure Range [psig] [Inch ] Body Material Standard Version Long Version Temperature Range according to ASME [ F] / 0. min. max. min. max. min. max. Chrome Steel 5 348 349 60-0 + 356 / 0. Stainless Steel 5 986 987 60-49 + 356 Pressure Temperature Ratings Type 439 US Units Valve Size [Inch ] Body Material Set Pressure Range [psig] Standard Version Temperature Range according to ASME [ F] / 0. min. max. min. max. Chrome Steel.5 3-0 + 356 / 0. Stainless Steel.5 3-49 + 356 Notes: For flanged versions the pressure temperature rating acc. to ANSI B 6.34 may supersede these limits The temperature is limited by the soft seal material, please refer to soft seal selection table on page 3. 8 LWN 47.6

Pressure Temperature Ratings Type 437 / 438 / 439 Metric Units Pressure Temperature Ratings Type 437 Metric Units Valve Size Set Pressure Range [bar] [mm ] Body Material Standard Version Long Version Temperature Range according to ASME [ C] / 78.5 min. max. min. max. min. max. Chrome Steel 0. 93 93 80-9 + 0 / 78.5 Stainless Steel 0. 68 68 80-68 + 80 Pressure Temperature Ratings Type 438 Metric Units Valve Size Set Pressure Range [bar] [mm ] Body Material Standard Version Long Version Temperature Range according to ASME [ C] / 78.5 min. max. min. max. min. max. Chrome Steel 93 93 80-9 + 80 / 78.5 Stainless Steel 68 68 80-45 + 80 Pressure Temperature Ratings Type 439 Metric Units Valve Size [mm ] Body Material Set Pressure Range [bar] Standard Version Temperature Range according to ASME [ C] / 78.5 min. max. min. max. Chrome Steel 0. 6-9 + 80 / 78.5 Stainless Steel 0. 6-45 + 80 Notes: For flanged versions the pressure temperature rating acc. to ANSI B 6.34 may supersede these limits. The temperature is limited by the soft seal material, please refer to soft seal selection table on page 3. LWN 47.7 9

Series 437 Threaded Safety Relief Valves Spring Loaded Accessories and Options Caps and Levers Accessories and Options Caps and Levers Series 437 is available with the following lever designs Cap H Packed lever H4, threaded design Materials subassembly Item 40 Body Material Chrome Steel Body Material Stainless Steel The packed lever H4 provides some special features: operation by turning the knob anticlock wise remains in open position until the knob is screwed down again open and closed position is indicated Item Component Cap H Packed lever H4 Cap H Packed lever H4 Lever cover Cap Knob Spindle cap 3 Bolt 4 Support ring 6 Pin 9 O-ring Stopper 3 Seal 4 Seal wire 5 Sealing nose Steel Plastic 36SS AISI 430F AISI 430F AISI 40 36SS 36SS Stainless Steel Viton AISI 430F Plastic 36SS Plastic 36SS 36SS 36SS Stainless Steel Viton Plastic 36SS 5 6 4 9 3 Open 4 5 3 4 3 Closed Cap H Packed lever H4 0 LWN 47.8

Accessories and Options Metal Seat Metal Seat (Type 437) The LESER metal seats (disc and nozzle) are lapped to optical flatness to ensure a tight shut off. LESER safety relief valves are supplied with a standard leak tightness according to API 57. Type 4373 Standard material for the disc is a hardened stainless steel. The combination of a hard disc material and a softer seat material () provides for improved wear resistance and longer product life. Type 4374 Disc and seat are provided in material for highest corrosion resistance. Any other material which is available from bar stock can be supplied as well (e.g. Hastelloy, Monel, Alloy0, ). 57 7.3 7. 7. 57 7.3 7. 7. Metal seat Stellited sealing surfaces Disc Materials subassembly Item 7 Item 7. 7. 7.3 57 Item Part Name Type 4373 Body Material Chrome Steel Type 4374 Body Material Stainless Steel Hardened Disc stainless steel Hardness 40 50 HRC Lifting aid AISI 430F Nut Steel Pin 36 36 Part Name Optional stellited sealing surfaces Stellited sealing surfaces For high temperature applications, or applications with abrasive fluids wear resistant sealing surfaces are recommended. The sealing surfaces of the disc, seat or nozzle can be stellited by build-upwelding. The minimum thickness of the stellite is 0.06 inch. In addition to the corrosion resistance, the stellited surface also offers a high resistance to impact and sudden changes in temperature. 7. Disc Inlet Body stellited Hardness 40 45 HRC stellited Hardness 40 45 HRC LWN 47.9

Series 437 Threaded Safety Relief Valves Spring Loaded Accessories and Options Soft Seal Soft Seal O-ring disc (Type 438) Vulcanized soft seal (Type 439) Disc with sealing plate (Type 437, optional) Code letter 7. 7. 7.3 Code letter 57 7.3 7. 7. Code letter 57 7. 7. 7.3 O-ring disc Type 438 Vulcanized soft seal disc Type 439 Disc with sealing plate Type 437 Application Type 437, 438 and 439 are provided with a soft seal disc for superior tightness maintained tightness close to the set pressure Features and Benefits three different designs for extended application range minimized leakage and product loss large selection of soft seal materials simple replacement of soft seal standard ARP o-ring sizes one standard durometer per o-ring material reduced maintenance costs Disc with vulcanized soft seal Type 439 with a vulcanized soft seat allows maintained tightness close to the set pressure especially at lower set pressures. Disc with sealing plate For applications, where the increased tightness of a soft seal is required but the temperature is too low or too high for an o-ring-disc, e.g. liquefied gases. Note: Code letter: Please refer to soft seal selection table For temperature limits and medium resistance refer to the soft seal selection table. Materials subassembly Item 7 Item Type 438 O-ring disc Type 439 Vulcanized soft seal disc Type 437 Disc with sealing plate Part Name Material Part Name Material Part Name Material 7. Disc Disc with vulcanized soft seal, refer to soft seal selection table Disc 7. Lifting aid Lifting aid Lifting aid 7.3 O-ring Refer to soft seal selection table 57 Pin Nut Pin 36 Sealing plate Pin Refer to soft seal selection table 36 LWN 47.0

Accessories and Options Soft Seal Soft Seal Selection Type 438 O-ring, Type 439 Vulcanized soft seal Abbrevation ASTM 48 CR NBR EPDM FPM (FKM) Designation Trade name Neoprene (Chloroprene) Buna-N (Nitrile-Butadiene) Buna - EP (Ethylene-Propylene - Diene) Viton (Fluorocarbon) FFKM 3 Kalrez (Perfluoro) Codeletter Option Code [ F] [ F] K J -40-40 N J30-3 -5 30 D J -49-45 30 L J3-4 -0 356 C J0 3 T min [ C] 0 48 T max [ C] 00 0 50 80 50 Application Paraffin oil, silicone oil and grease, water and waterbased solvents, refrigerants, ozone Hydraulic oil, vegetable and animal grease and oil Hot water and superheated steam up to 30 F, several organic and inorganic acids, silicone oil and grease, FDA compliant For high temperature service (no superheated steam), mineral oil and grease, silicone oil and grease, vegetable and animal grease and oil, ozone, FDA compliant compound available on request Nearly all chemicals, standard compound is Kalrez 6375 with steam resistance, FDA compliant compound available on request Type 437 Sealing plate SP PCTFE VESPEL SP- (Polyimide) Kel-F (Polychlorotrifluoroethylene) T G J49 J48-454 -454 57 400 High temperature and high pressure applications (no steam), for chemical resistance refer to manufacturers guide Cryogenic and refrigeration application, flammable media, gaseous oxygene application up to 75 psig at 40 ºF Teflon PTFE (Polytetrafluoroethylene) A J44-300 -84 30 50 Nearly all chemicals Other Please contact LESER LLC Notes: The code letters will be stamped on the disc. For soft seal materials other than listed the code letter X will be used. Pressure and temperature service must be considered in any case. 3 For type 439: material is ISOLAST. -70-70 300 04 Set Pressure Limits Sealing plate disc Material [psig] VESPEL SP- 50 Kel-F.5 min. Pressure Range [bar] [psig] 0 60 0. 60 max. [bar] 80 80 Registered Trademarks Buna-N, Teflon, Viton, VESPEL SP-, Neoprene, Kalrez Buna EP Company DuPont Bayer 3M Teflon.5 0. 45 0 Kel-F Busak + ISOLAST Shamban LWN 47. 3

Series 437 Threaded Safety Relief Valves Spring Loaded Accessories and Options Heating Jacket Heating Jacket (Type 437) Application Pressure relief valves in systems to be protected from media which are viscous, sticky or have a tendency to crystallize out of solution can be fitted with a heating jacket. For type 437 the outlet body is fitted with a fabricated heating jacket. The position of the heating connections is shown in figure. Specifications of the heating jacket The operating data for the heating jacket are shown on a separate name plate. Operating Pressure p max Operating Temperatures T max 60 psig 40 F Available heating connections Connection Option Code Couplings FNPT S0 + H9 Type 437 with heating jacket 4 LWN 47.

Spare Parts Discs O-ring Spare Parts Discs Type 437 metal to metal seat (Item 7) Valve Size [Inch ] Type 4373 Hardened stainless steel Type 4374 Stainless Steel all 0. 00.8739.9000 00.8749.9000 Discs Type 438 soft seal with o-ring, disc material: (Item 7) Valve Size all (standard version) [Inch ] O-ring size ARP-no. CR Neoprene K EPDM Ethylene F FPM (FKM) Viton L NBR Nitrile N FFKM Kalrez C 0. 7 /6 x 3 /3 00.8349.975 00.8349.974 00.8349.977 00.8349.978 00.8349.979 ARP all (long version) 0. 7 /6 x 3 /3 00.8549.9053 00.8549.904 00.8549.9073 00.8549.9083 00.8549.909 ARP O-ring Type 438 soft seal (Item 7.3) Valve Size [Inch ] O-ring size ARP-no. CR Neoprene K EPDM Ethylene F FPM (FKM) Viton L NBR Nitrile N FFKM Kalrez C all 0. 7 /6 x 3 /3 50.007.65 50.007.64 50.007.67 50.007.68 50.007.69 ARP Discs Type 439 with vulcanized soft seal (Item 7) Valve Size [Inch ] CR Neoprene K EPDM Ethylene F FPM (FKM) Viton L NBR Nitrile N FFKM ISOLAST C all 0. 00.9049.905 00.9049.904 00.9049.907 00.9049.908 00.9049.909 LWN 47.3 5

Series 437 Threaded Safety Relief Valves Spring Loaded Spare Parts Inlet Bodies Inlet Bodies Types 437 Threaded connections Material (Item ) Male NPT Female NPT Size [Inch ] Part Number Size [Inch ] Part Number / 0. 36.4449.904 / 0. 36.4449.9 3 /4 0. 36.4549.904 3 /4 0. 36.4549.9 0. 36.5849.904 0. 36.5849.9 Inlet Bodies Types 438 / 439 Threaded connections Material (Item ) Male NPT Female NPT Size [Inch ] Part Number Size [Inch ] Part Number / 0. 36.4949.904 / 0. 36.4949.9 3 /4 0. 36.5449.904 3 /4 0. 36.5449.9 0. 36.6849.904 0. 36.6849.9 6 LWN 47.4

Approvals Series 437 Rated slope Approvals Series 437 Coefficient of Discharge Country Code Type Fluid Approval No. ASME Certified K ASME Measured K D United States ASME Sec. VIII 437 438 / 439 S / G L S / G L 373 3789 3790 370 0. 0.458 0.333 0.406 0.3 0.509 0.370 0.45 0.358 Canada CRN 437 / 438 / 439 S / G / L OG077.9C 0. Refer to ASME Sec. VIII Country Code Type Fluid Approval No. Certified Coefficient of Discharge K dr Europe PED 97 / 3 / EC (CE-marking) 437 438 / 439 S / G L S / G L 0700 Z0008/0/- 0. 0.50 0.35 0.40 0.33 α w Germany AD 000- Merkblatt A China: 437 438 / 439 CSBQTS S / G L S / G L TUEV-SV 980 0. 0.50 0.35 0.40 0.33 Others Russia: Ship classification authorities: DIN GOST BV, DNV, GL, LROS, RINA Notes: Acc. to ASME Sec. VIII the certified coefficient of discharge K is calculated by K = 0.9 * K D For sizing acc. to ASME Sec. VIII K must be used in the sizing equations. Rated slope Within the capacity certification according to ASME Sec. VIII the coefficients of discharge for series 437 are issued as rated slope values instead of K values. Rated slope values can be converted into K values. The table above shows the converted K values. The original rated slope values are listed below. Fluid Rated slope Type 437 Rated slope Type 438/439 S.86 lb / hr / PSIA.55 lb / hr / PSIA G.0 SCFM / PSIA 0.904 SCFM / PSIA L.54 GPM PSID.49 GPM / PSID LWN 47.5 7

Series 437 Threaded Safety Relief Valves Spring Loaded Capacities US Units STEAM AIR WATER Type 437 STEAM ASME Section VIII [lb/hr] Capacities US Units AIR ASME Section VIII [S.C.F.M.] Capacities US Units WATER ASME Section VIII [US - G.P.M.] Capacities US Units Set pressure [psig] 5 94 0 08 30 37 40 68 50 00 60 3 70 63 80 95 90 36 00 358 0 4 40 484 60 547 80 6 00 674 0 737 40 800 60 863 80 96 300 990 30 053 340 6 360 79 380 4 400 306 500 6 600 937 700 53 800 569 900 000 00 00 300 400 500 000 500 3000 Set pressure 0. Inch [psig] 5 33.5 0 38.6 30 48.9 40 60. 50 7.4 60 8.7 70 93.9 80 05 90 7 00 8 0 50 40 73 60 95 80 8 00 4 0 63 40 86 60 308 80 33 300 353 30 376 340 398 360 4 380 443 400 466 500 579 600 69 700 804 800 97 900 030 000 43 00 55 00 368 300 48 400 594 500 706 000 70 500 834 3000 Set pressure 0. Inch [psig] 0. Inch 5 6.54 0 7.39 30 8.86 40 0. 50.4 60.5 70 3.5 80 4.5 90 5.3 00 6. 0 7.7 40 9. 60 0.5 80.7 00.9 0 4.0 40 5.0 60 6. 80 7. 300 8.0 30 8.9 340 9.8 360 30.7 380 3.5 400 3.3 500 36. 600 39.6 700 4.8 800 45.7 900 48.5 000 5. 00 53.6 00 56.0 300 58.3 400 60.5 500 6.6 000 7.3 500 80.8 3000 Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure. Capacities at 30 psig and bellow are based on 3 psig overpressure. Capacities for air according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 60 F. Capacities at 30 psig and below are based on 3 psig overpressure. Capacities for water according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 68 F. Capacities at 30 psig and below are based on 3 psig overpressure. 8 LWN 47.6

Capacities Metric Units STEAM AIR WATER Type 437 STEAM ASME Section VIII [kg / hr] Capacities Metric Units AIR ASME Section VIII [Sm 3 /hr] Capacities Metric Units WATER ASME Section VIII [0 3 kg/ hr] Capacities Metric Units Set pressure [bar] 4 6 3 8 4 0 5 3 6 44 7 65 8 85 9 06 0 7 69 4 30 6 35 8 393 0 435 476 4 58 6 560 8 60 30 643 3 684 34 76 36 768 38 809 40 85 50 059 60 67 70 80 90 00 0 0 30 40 50 60 70 80 90 00 Set pressure 78.5 mm [bar] 56 8 3 09 4 37 5 65 6 9 7 0 8 48 9 76 0 304 359 4 45 6 470 8 56 0 58 637 4 693 6 748 8 804 30 860 3 95 34 97 36 06 38 08 40 38 50 46 60 694 70 97 80 50 90 58 00 806 0 3084 0 336 30 3640 40 398 50 496 60 4474 70 475 80 5030 90 00 Set pressure 78.5 mm [bar] 78.5 mm.46.98 3.4 4.80 5 3.3 6 3.4 7 3.70 8 3.95 9 4.9 0 4.4 4.84 4 5.3 6 5.59 8 5.93 0 6.5 6.56 4 6.85 6 7.3 8 7.40 30 7.66 3 7.9 34 8.5 36 8.39 38 8.6 40 8.84 50 9.89 60 0.8 70.7 80.5 90 3.3 00 4.0 0 4.7 0 5.3 30 5.9 40 6.5 50 7. 60 7.7 70 8. 80 8.8 90 00 Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure. Capacities at.07 bar (30 psig) and below are based on 0.07 bar (3 psig) overpressure. Capacities for air according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 6 C. Capacities at.07 bar (30 psig) and below are based on 0.07 bar (3 psig) overpressure. Capacities for water according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 0 C. Capacities at.07 bar (30 psig) and below are based on 0.07 bar (3 psig) overpressure. LWN 47.7 9

Series 437 Threaded Safety Relief Valves Spring Loaded Capacities US Units STEAM AIR WATER Type 438 / 439 STEAM ASME Section VIII [lb/hr] Capacities US Units AIR ASME Section VIII [S.C.F.M.] Capacities US Units WATER ASME Section VIII [US - G.P.M.] Capacities US Units Set pressure [psig] 5 83 0 96 30 40 49 50 77 60 05 70 33 80 6 90 89 00 37 0 373 40 49 60 485 80 54 00 597 0 653 40 709 60 765 80 8 300 877 30 933 340 989 360 045 380 0 400 57 500 437 600 700 800 900 000 00 00 300 400 500 000 500 Set pressure 0. Inch [psig] 5 30 0 34 30 43 40 53 50 63 60 73 70 83 80 93 90 03 00 3 0 33 40 53 60 73 80 93 00 3 0 33 40 53 60 73 80 93 300 33 30 333 340 353 360 373 380 393 400 43 500 53 600 63 700 73 800 83 900 93 000 03 00 3 00 3 300 33 400 43 500 53 000 0 500 5 Set pressure 0. Inch [psig] 0. Inch 5 6.3 0 7.5 30 8.56 40 9.89 50. 60. 70 3. 80 4.0 90 4.8 00 5.6 0 7. 40 8.5 60 9.8 80.0 00. 0 3. 40 4. 60 5. 80 6. 300 7. 30 8.0 340 8.8 360 9.7 380 30.5 400 3.3 500 35.0 600 38.3 700 4.4 800 44. 900 46.9 000 49.4 00 5.9 00 54. 300 56.4 400 58.5 500 60.5 000 69.9 500 78. Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure. Capacities at 30 psig and bellow are based on 3 psig overpressure. Capacities for air according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 60 F. Capacities at 30 psig and below are based on 3 psig overpressure. Capacities for water according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 68 F. Capacities at 30 psig and below are based on 3 psig overpressure. 30 LWN 47.8

Capacities Metric Units STEAM AIR WATER Type 438 / 439 STEAM ASME Section VIII [kg / hr] Capacities Metric Units AIR ASME Section VIII [Sm 3 /hr] Capacities Metric Units WATER ASME Section VIII [0 3 kg/ hr] Capacities Metric Units Set pressure [bar] 37 54 3 7 4 9 5 09 6 8 7 46 8 64 9 83 0 0 38 4 75 6 3 8 349 0 386 4 4 459 6 496 8 533 30 570 3 607 34 644 36 680 38 77 40 754 50 60 70 80 90 00 0 0 30 40 50 60 70 80 90 00 Set pressure 78.5 mm [bar] 50 7 3 97 4 5 46 6 7 7 95 8 0 9 44 0 69 38 4 368 6 47 8 466 0 56 565 4 64 6 663 8 73 30 76 3 8 34 86 36 90 38 959 40 008 50 55 60 50 70 748 80 994 90 4 00 487 0 734 0 980 30 37 40 3473 50 370 60 3966 70 43 80 4459 90 00 Set pressure 78.5 mm [bar] 78.5 mm.4.9 3.34 4.70 5 3.0 6 3.3 7 3.58 8 3.8 9 4.06 0 4.8 4.68 4 5.06 6 5.4 8 5.74 0 6.05 6.34 4 6.6 6 6.89 8 7.5 30 7.40 3 7.65 34 7.88 36 8. 38 8.33 40 8.55 50 9.56 60 0.5 70.3 80. 90.8 00 3.5 0 4. 0 4.8 30 5.4 40 6.0 50 6.6 60 7. 70 7.6 80 8. 90 00 Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure. Capacities at.07 bar (30 psig) and below are based on 0.07 bar (3 psig) overpressure. Capacities for air according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 6 C. Capacities at.07 bar (30 psig) and below are based on 0.07 bar (3 psig) overpressure. Capacities for water according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 0 C. Capacities at.07 bar (30 psig) and below are based on 0.07 bar (3 psig) overpressure. LWN 47.9 3

Series 437 Threaded Safety Relief Valves Spring Loaded Specification Sheet Specification Sheet Please fax to: 636 36 985 or your local representative Company: Phone: Page: of Location: Name: Reference: Fax: e-mail: Date: GENERAL Item No.: 9 Basis of Selection: Code: Tag No.: ASME VIII 3 Customer: PED 97/ 3/ EC (CE-marking) Fire 4 Equipment: other: 5 Enquiry/Order No.: 0 Documentation: Material test report 6 Delivery time: inlet body outlet body 7 Number of valves: other: 8 Number of spare valves: SERVICE CONDITIONS Fluid and state: Steam (S) Gas (G) Liquid (L) Two phase Molecular weight: 0 Set pressure / units: 3 Coefficient C: Operating pressure / units: 4 Ratio of specific heats k: Cold diff. set pressure / units: 5 Compressibility factor Z: 3 Const. back pressure / units: 6 Spec. gravity / units: 4 Var. back pressure / units: 7 Viscosity / units: 5 Overpressure: 0 %... % 8 Relieving temperature / units: 6 Blowdown: 0 % 0 % 9 Required capacity / units:... % VALVE CONSTRUCTION 7 Designation: 8 Connection inlet Connection outlet 9 Size: Size: 30 Thread type or Flange class: Thread type or Flange class: 3 Facing type: RF RJ other: Facing type: RF RJ other: MATERIALS 3 LESER Material Code 3: Chrome steel 4: Stainless steel 33 LESER Type: 437 438 439 37 Soft seat CR NBR EPDM 34 Inlet body: seal: FPM FFKM other: 35 Outlet body: 38 Spring: high temp. alloy steel carbon steel 36 Disc (Type 437): SS hardened stainless steel other: other: 39 Comply with NACE MR 075 Yes No ACCESSORIES AND OPTIONS 40 Lifting lever: packed H4 cap H 4 Others (specify): SIZING AND SELECTION 4 Required orifice area / units: 43 Selected orifice area / units: 44 Coeff. of discharge: 45 Calculated capacity / units: Order Code 4 3. Please fill in these fields in any case. Please fill in these fields if possible. These fields will be completed by the supplier. Article No. Set Pressure Connections Options Documentation Code and Medium 3 LWN 47.30

Series 459 Series 459 Type 459 / 46 Type 459 / 46 carbon steel LWN 47.3 33

Series 459 Threaded Safety Relief Valves Spring Loaded Materials Type 459 Materials Type 459 Item Part Name Type 4593 SG Iron Inlet body SA 479 Outlet body Gr. 60-40-8 7 Disc 8 Guide Hardened stainless steel AISI 430F tenifer 9 Bonnet Gr. 60-40-8 Carbon Steel SA 05 SA 479 Spindle AISI 40 AISI 40 4 Split ring AISI 430F AISI 430F 6/7 Spring plate Steel Steel 8 54 Adjusting screw with bushing Spring standard Spring optional Threaded Connections AISI 430F PTFE 9 Lock nut Steel Steel 40 Cap H Steel Steel Carbon Steel High temp. alloy steel or stainless steel Type 459 Carbon Steel SA 479 SA 479 Hardened stainless steel AISI 430F tenifer AISI 430F PTFE Carbon Steel High temp. alloy steel or stainless steel Type 4594 Stainless Steel SA 479 SA 479 PTFE Stainless Steel Type 459 40 8 9 9 6 54 7 4 60 8 57 6 7 57 Pin 36 36 36 60 Gasket Graphite / Flanged Version Inlet body SA 479 SA 479 SA 479 Outlet body Gr. 60-40-8 SA 479 SA 479. Outlet adaptor. Outlet flange 48 Inlet flange Graphite / Graphite / 6 Ball 36 36 36.. 40 8 9 9 6 54 7 4 60 8 57 6 7 48 34 Type 459 Flanged version LWN 47.3

Materials Type 459 Balanced Bellows Design Materials Type 459 Balanced Bellows Design 40 Threaded Connections Item Part Name Type 4593 SG Iron Inlet body SA 479 Outlet body Gr. 60-40-8 Type 459 Carbon Steel SA 479 SA 479 Type 4594 Stainless Steel SA 479 SA 479 8 9 9 6 54 7 Disc 8 Guide Hardened stainless steel AISI 430F tenifer 9 Bonnet Gr. 60-40-8 Carbon Steel SA 05 SA 479 Bonnet spacer SA 479 SA 479 SA 479 Spindle AISI 40 AISI 40 4 Split ring AISI 430F AISI 430F 5 Bellows 6 / 7 Spring plate Steel Steel 8 54 Adjusting screw with bushing Spring standard Spring optional AISI 430F PTFE 9 Lock nut Steel Steel 40 Cap H Steel Steel Carbon Steel High temp. alloy steel or stainless steel Flanged Version Inlet body SA 479 Outlet body Gr. 60-40-8 Hardened stainless steel AISI 430F tenifer AISI 430F PTFE Carbon Steel High temp. alloy steel or stainless steel SA 479 SA 479 SA 479 SA 479. Outlet adaptor. Outlet flange 48 Inlet flange PTFE Stainless Steel 57 Pin 36 36 36 60 Gasket Graphite / Graphite / Graphite / 6 Ball 36 36 36 Type 459 Balanced bellows design 7 4 60 5 60 57 6 7 LWN 47.33 35

Series 459 Threaded Safety Relief Valves Spring Loaded Materials Type 46 Materials Type 46 Item Part Name Type 463 SG Iron Inlet body SA 479 Outlet body Gr. 60-40-8 7 Disc with soft seal 8 Guide AISI 430F tenifer 9 Bonnet Gr. 60-40-8 Carbon Steel SA 05 SA 479 Spindle AISI 40 AISI 40 4 Split ring AISI 430F AISI 430F 6 Spring plate Steel Steel 8 54 Adjusting screw with bushing Spring standard Spring optional Threaded Connections AISI 430F PTFE 9 Lock nut Steel Steel 40 Cap H Steel Steel 60 Gasket Carbon Steel High temp. alloy steel or stainless steel Graphite / Type 46 Carbon Steel SA 479 SA 479 AISI 430F tenifer AISI 430F PTFE Carbon Steel High temp. alloy steel or stainless steel Graphite / Type 464 Stainless Steel SA 479 SA 479 PTFE Stainless Steel 57 Pin 36 36 36 Graphite / 6 Ball 36 36 36 Type 46 40 8 9 9 6 54 7 4 60 8 57 6 7 40 8 Flanged Version Inlet body SA 479 Outlet body Gr. 60-40-8 SA 479 SA 479 SA 479 SA 479. Outlet adaptor. Outlet flange 48 Inlet flange Note: CR Neoprene NBR Nitrile EPDM Ethylene / Propylene FPM Fluorocarbon FFKM Kalrez.. 9 6 54 7 60 8 7 48 36 Type 46 Flanged version LWN 47.34

Materials Type 46 Balanced Bellows Design Materials Type 46 Balanced Bellows Design Item Part Name Type 463 SG Iron Inlet body SA 479 Outlet body Gr. 60-40-8 7 Disc with soft seal 8 Guide AISI 430F tenifer 9 Bonnet Gr. 60-40-8 Bonnet spacer SA 479 SA 479 SA 479 Spindle AISI 40 AISI 40 4 Split ring AISI 430F AISI 430F 5 Bellows 6/ 7 Spring plate Steel Steel 8 54 Adjusting screw with bushing Spring standard Spring optional Threaded Connections AISI 430F PTFE 9 Lock nut Steel Steel 40 Cap H Steel Steel 60 Gasket Carbon Steel High temp. alloy steel or stainless steel Graphite / Flanged Version Inlet body SA 479 Outlet body Gr. 60-40-8 Type 46 Carbon Steel SA 479 SA 479 AISI 430F tenifer CarbonSteel SA 05 AISI 430F PTFE Carbon Steel High temp. alloy steel or stainless steel Graphite / SA 479 SA 479 Type 464 Stainless Steel SA 479 SA 479 SA 479 PTFE Stainless Steel 57 Pin 36 36 36 Graphite / 6 Ball 36 36 36 SA 479 SA 479. Outlet adaptor. Outlet flange 48 Inlet flange Note: CR Neoprene NBR Nitrile EPDM Ethylene / Propylene FPM Fluorocarbon FFKM Kalrez Type 46 Balanced bellows design 40 8 9 9 6 54 7 4 60 5 60 57 6 7 LWN 47.35 37

Series 459 Threaded Safety Relief Valves Spring Loaded Materials Type 459 Heavy Duty Design Materials Type 459 Heavy Duty Design Item Part Name Inlet body Outlet body 7 Disc 8 Guide 9 Bonnet Spindle 6/7 Spring plate 8 Adjusting screw with bushing 40 Cap H 54 Spring Threaded Connections Type 4594 Stainless Steel SA 479 SA 479 SA 479 4 Split ring PTFE 9 Lock nut Stainless Steel 57 Pin 36 60 Gasket Graphite / 6 Ball 36 40 8 9 9 6 54 7 4 60 8 57 6 7 Type 459 Heavy duty design 40 8 9 9 6 54 7 4 60 5 60 57 6 7 38 Type 459 Heavy duty design with balanced bellows LWN 47.36

Material Options Type 4594 The Heavy Duty Design of Type 459 offers the possibility to easily obtain special material versions. The fact that all product wetted parts are machined from bar stock materials makes it easier and faster to fulfill almost all material requirements according to the material availability. Two special material levels are available: Level special materials for the trim = wetted parts in closed position Level special material for trim and outlet = wetted parts in open position Material Options Type 4594 Heavy Duty Design Item 7 Level Trim Part Name Inlet body Disc Level Trim and Outlet Item Part Name Inlet body Outlet body 7 5 57 Disc Bonnet spacer Bellows Pin 6 Ball Option Code Material Option Code Material Grade HA Hastelloy Grade HB Hastelloy Grade MA Monel Grade MB Monel Grade DA Duplex Grade DB Duplex Note: Available in, Duplex, Hastelloy, Inconel, Monel. Other materials on request. LWN 47.37 39

Series 459 Threaded Safety Relief Valves Spring Loaded How to Order Numbering System How to Order Numbering System 3 Article Number Set Pressure Connections 3 4 459 4. 55 Type 459 / 46 Please state unit (in gauge)! Please do not exceed pressure range mentioned in the spring charts. Please refer to table Available Connections on page 43. Please state one option code for each, inlet and outlet. Types of sealing Metal seat Metal-to-metal Metal-to-metal stellited Soft seat EPDM NBR CR FFKM (Kalrez ) FKM (Viton ) Plastic seat SP Vespel-SP PCTFE Kel-F PTDE-FDA Teflon 459 Type 46 3 4 Material Code Body Material Carbon Steel 3 Body Material SG iron 4 Body Material Stainless Steel Valve Code Identifies valve size, body material and orifice, refer to page 4. Code for lifting device Screwed cap H 3 Plain lever H3 4 Packed lever H4 4594.55 00 psig V6 V7 Article No. Set Pressure Connections 40 LWN 47.38

How to Order Numbering System 4 5 6 Options Documentation Code and Medium Type 459 / 46 Option Code Outlet body L9 heavy duty design (Type 459) Inlet body stellited L0 (Type 459) Soft seal material NBR N J30 (Type 46) EPDM F J CR K J FKM L J3 FFKM C J0 Stainless steel bellows p < 580 psig J78 p > 580 psig J78 + J55 Hastelloy J8 Elastomer bellows J79 Heating jacket H9 Heating jacket H33 bonnet spacer High temperature X0 alloy spring Stainless steel spring X04 Please select requested documentation: Material test certificate DIN EN 004-3. Parts Inlet body Outlet body Bonnet Cap/ lever cover Disc Option Code H0 L34 L30 L3 L3. Code. ASME Section VIII. CE / VdTUEV 3. ASME Section VIII + CE / VdTUEV Medium. Gases. Liquids.3 Steam.0 Steam/ Gases/ Liquids (valid only for CE / VdTUEV) J78 H0 L30. Options Documentation Code and Medium LWN 47.39 4

Series 459 Threaded Safety Relief Valves Spring Loaded How to Order Article Numbers How to order Article Numbers Type 459 Type 4593 Body Material SG Iron Type 459 Body Material Carbon Steel Type 4594 Body Material Stainless Steel [Inch ] Cap H Packed Lever H4 Plain Lever H3 Cap H Packed Lever H4 Plain Lever H3 Cap H Packed Lever H4 0.099 4593.50 4593.504 4593.503 459.47 459.474 459.473 4594.55 4594.554 0.06 4593.5 4593.54 4593.53 459.48 459.484 459.483 4594.56 4594.564 0.373 4593.5 4593.54 4593.53 459.49 459.494 459.493 4594.57 4594.574 Article Numbers Type 46 Type 463 Body Material SG Iron Type 46 Body Material Carbon Steel Type 464 Body Material Stainless Steel [Inch ] Cap H Packed Lever H4 Plain Lever H3 Cap H Packed Lever H4 Plain Lever H3 Cap H Packed Lever H4 0.099 463.90 463.904 463.903 46.377 46.3774 46.3773 464.95 464.954 0.06 463.9 463.94 463.93 46.378 46.3784 46.3783 464.96 464.964 0.373 463.9 463.94 463.93 46.379 46.3794 46.3793 464.97 464.974 Article Numbers Type 459 Heavy duty design [Inch ] Cap H Type 4594 Body Material Stainless Steel Packed Lever H4 0.044 (L) 4594.53 4594.534 0.044 (S/G) 4594.54 4594.544 0.099 4594.58 4594.584 0.06 4594.59 4594.594 Notes: Liquid service Steam and gas service Article Numbers Type 46 Heavy duty design [Inch ] Cap H Type 464 Body Material Stainless Steel Packed Lever H4 0.099 464.5 464.54 0.06 464.7 464.74 4 LWN 47.40

How to Order Available Connections Male thread Female thread Flanged version Available Connections Threaded Option codes Inlet Male NPT Inlet Female NPT Outlet Female NPT Size 0.044 [Inch ] 0.099 0.06 0.373 Size 0.044 [Inch ] 0.099 0.06 0.373 Size 0.044 [Inch ] 0.099 0.06 0.373 / V6 V6 V6 / V58 V58 V58 / 3 /4 V6 V6 V6 3 /4 V59 V59 V59 V59 3 /4 V63 V63 V63 V63 V60 V60 V60 V60 V7 V7 V7 / V64 / V75 / V7 V7 V7 Available Connections Flanged ANSI B6.5 Option codes Inlet [Inch ] Outlet [Inch ] Size / 3 /4 / ANSI-Class 50 300 / 600 900 / 500 500 50 300 / 600 900 / 500 500 50 300 / 600 900 / 500 500 0.044 V0 V0 V03 V04 V05 V06 V07 V08 V09 V0 V V 0.099 V0 V0 V03 V04 V05 V06 V07 V08 V09 V0 V V 0.06 V05 V06 V07 V08 V09 V0 V V 0.373 V05 V06 V07 V08 V09 V0 V V Size / ANSI-Class 50 300 / 600 900 50 300 / 600 900 0.044 0.099 0.06 V8 V9 V0 V8 V9 V0 V V V3 V8 V9 V0 V V V3 0.373 V V V3 Notes: maximum inlet flange class: #500 extended center to face dimension outlet: 4 3 /4 (0 mm) LWN 47.4 43

Series 459 Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Type 459 / 46 Male thread Female thread Flanged version Dimensions and Weights Threaded Connections US Units Connection Size [Inch] Inlet Center to Face [Inch] Male Female a c a / x /4 x x 3 /4 3 /4 47 /64 55 /64 /64 /8 /64 /64 /64 3 /4 x / 9 /3 55 /64 /4 x / 57 /64 /8 /4 / x / /8 /8 63 /64 Note: not for orifice 0.044 inch Outlet b 6 /64 Standard Height [Inch] Bellows Weight [lbs] H max. H max. m /6 /6 7 /3 7 /3 /64 /8 6 /64 6 /64 3 7 /64 3 7 /64 3 7 /64 3 5 /64 5.7 5.7 5.7 6.6 6.6 6.6 Dimensions and Weights Flanged Connections US Units [Inch ] 0.044 0.099 50 RF 500 RF a 3 5 /6 3 5 /6 0.06 3 5 /6 0.373 4 9 /64 Center to Face [Inch] Inlet 300 RJ 500 RJ a 4 7 /3 4 7 /3 4 7 /3 4 9 /6 500 RJ a 4 3 /64 4 3 /64 4 3 /64 4 7 /3 Outlet 50 RF 600 RF b 3 5 /6 Standard H 63 /64 63 /64 63 /64 3 7 /64 Height [Inch] Bellows H 4 /4 4 /4 4 3 /8 Weight [lbs] m 7.6 44 LWN 47.4

Dimensions and Weights Type 459 / 46 Flange Thickness Dimensions and Weights Threaded Connections Metric Units Center to Face [mm] Connection Size Inlet [Inch] Male a c / x /4 x x 45 45 44 7 3 /4 x / 49 x / 48 7 / x / 54 7 76 Note: not for orifice 0.044 inch Female a 55 55 55 57 57 Outlet b 75 Standard Height [mm] Bellows Weight [kg] Hmax. Hmax. m 75 75 74 79 78 8 307 307 306 3 30 33.6.6.6 3 3 3 Dimensions and Weights Flanged Connections Metric Units [mm ] 8. 63.6 50 RF 500 RF a 00 00 33 00 4 05 Center to Face [mm] Inlet 300 RJ 500 RJ a 07 07 07 6 500 RJ a 4 4 4 3 Outlet 50 RF 600 RF b 00 Standard Hmax. 330 330 330 333 Height [mm] Bellows Hmax. 36 36 365 Weight [kg] m 8 Flange Thickness US Units Flange Thickness [Inch] Flange Thickness Metric Units Flange Thickness [mm] Connection Size [Inch] Class 50 s Class 300/600 s Class 900/500 s Class 500 s Connection Size [Inch] Class 50 s Class 300/600 s Class 900/500 s Class 500 s / /4 5 /8 /6 3 /4 / 5 /6 5 /6 5 /6 /8 3 /6 /4 /4 9 /6 9 /6 7 /6 / 5 /8 / /4 7 7 9 / 4 5 5 8 3 33 3 39 40 37 39 4 53 LWN 47.43 45

Series 459 Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings US Units Type 459 / 46 Pressure Temperature Ratings US Units Type 459 Notes: [Inch ] 0.044 0.099 0.06 min. 50.8.9 0.373.9 Set Pressure Range [psig] max. 8550 (600) 3 5800 900 450 min. with bellows 43.5 43.5 43.5 Temperature Range acc. to ASME [ F] SG Iron Carbon Steel Stainless Steel Stainless Steel Heavy Duty Design min. max. min. max. min. max. min. max. -0 + 57-0 +800 for flanged versions the pressure temperature rating acc. to ANSI B 6.34 may supersede these limits above 57 F / 300 C stainless steel bellows is required for spring heat protection 3 value in brackets: special spring required, expect longer lead time - 300 +800-450 +000 Pressure Temperature Ratings US Units Type 46 Notes: [Inch ] 0.099 0.06 min. 7.3.9 0.373.9 Set Pressure Range [psig] max. 5075 900 450 min. with bellows 43.5 43.5 43.5 SG Iron min. max. -0 + 356 for flanged versions the pressure temperature rating acc. to ANSI B 6.34 may supersede these limits the temperature is limited by the soft seal material, please refer to soft seal selection table on page 53 Temperature Range acc. to ASME [ F] Carbon Steel Stainless Steel min. max. min. max. - 0 + 356-49 +356 46 LWN 47.44

Pressure Temperature Ratings Metric Units Type 459 / 46 Pressure Temperature Ratings Metric Units Type 459 Notes: [mm ] 8. 63.6 33 min. 0.5 0. 4 0. Set Pressure Range [bar] max. 590 (800) 3 400 00 00 min. with bellows 3 3 3 Temperature Range acc. to ASME [ C] SG Iron Carbon Steel Stainless Steel Stainless Steel Heavy Duty Design min. max. min. max. min. max. min. max. -9 + 300-9 + 47-84 + 47 for flanged versions the pressure temperature rating acc. to ANSI B 6.34 may supersede these limits above 57 F / 300 C stainless steel bellows is required for spring heat protection 3 value in brackets: special spring required, expect longer lead time - 68 +538 Pressure Temperature Ratings Metric Units Type 46 Notes: [mm ] 63.6 33 min. 0.5 0. 4 0. Set Pressure Range [bar] max. 350 00 00 min. with bellows 3 3 3 SG Iron min. max. for flanged versions the pressure temperature rating acc. to ANSI B 6.34 may supersede these limits the temperature is limited by the soft seal material, please refer to soft seal selection table on page 53 Temperature Range acc. to ASME [ C] Carbon Steel Stainless Steel min. max. min. max. - 9 + 80-9 + 80-45 +80 LWN 47.45 47

Series 459 Threaded Safety Relief Valves Spring Loaded Accessories and Options Caps and Levers Accessories and Options Caps and Levers Series 459 is available with the following lever designs Cap H Plain lever H3 Packed lever H4 Test gag, available for cap H and packed lever H4 Materials subassembly Item 40 Item Component Cap H Body Material Carbon Steel or SG Iron Plain Lever H3 Packed Lever H4 Body Material Stainless Steel. Lever cover Gr. 60-40-8 Gr. 60-40-8 CF8M Cap Steel 3 a Spacer 3 b Hex screw B7 4 /.4 Shaft / Bolt Steel Steel.5 Lifting fork Carbon Steel Carbon Steel 6 /.6 Lever Carbon Steel Carbon Steel 36SS.7 Washer Carbon Steel Carbon Steel 36SS.8 Nut H 8M.9 O-ring Viton.9 Bushing Graphite.0 Retaining clip Carbon Steel Carbon Steel.0 Nut. Support ring Carbon Steel 36SS Spindle cap Carbon Steel Carbon Steel 3 Pin 36SS 36SS 36SS 4 Retaining clip 36SS 36SS 36SS Plug Plastic 3 Seal Plastic Plastic Plastic Plastic Plastic 4 Seal wire 36SS 36SS 36SS 36SS 36SS 5 Sealing nose 93 Test gag 36SS 36SS 36SS 36SS 93.5 Washer Fiber Fiber Fiber Fiber Cap H Packed Lever H4 5 4 3 4 3 3 6 3b 4 0 4 Cap H Plain lever H3 48 LWN 47.46

Accessories and Options Caps and Levers 93 93.5 4 3.5 4 3.6 3a.8.7.0 BLOCKED. Remove after testing!..9.4 Packed lever H4 Test gag LWN 47.47 49

Series 459 Threaded Safety Relief Valves Spring Loaded Accessories and Options Balanced Bellows Balanced Bellows Application Bellows protect the guides, moving parts and the spring from dirt, corrosion, impurities or temperature to guarantee the proper function of the safety relief valve. Additionally they provide for back pressure compensation. Design Series 459 with balanced bellows is provided with a bonnet spacer to house the bellows. The spacer serves for cooling and shields the bellows against turbulences during discharge to avoid vibration and to guarantee longer lifetime. Materials and Limits of Application Bellows material Bellows joint materials Minimum set pressure limit Maximum set pressure limit Superimposed back pressure limit 3 Built up back pressure limit 3 Temperature limits (Type 459) Standard Heavy Duty Option codes J78 J78 + J55 43.5 psig 580 psig 580 psig acc. to set pressure limit of the valve 3 psig 580 psig max. 35 % of set pressure, not to exceed the maximum bellows back pressure limit up to 75 F Hastelloy Hastelloy C Hastelloy C J8 (Hastelloy ) Inconel Inconel Inconel J78 + S5 (Inconel ) Notes: The bellows for type 459/46 is back pressure compensating for orifice size 0.06 Inch (33 mm ). It is over compensating for orifice size 0.099 Inch (63,6 mm ) and under compensating for orifice size 0.373 Inch (4 mm ). Please ask factory for details. Type 4594 with heavy duty body: up to 0 F, the temperature limits for type 46 depend on other parts e.g. soft seal materials. 3 The so called built up back pressure limit defines limit for which the proper function of the pressure relief valve is ensured. The superimposed back pressure limit of a bellows refers only to the static stability of the bellows design and does not consider the influence of the backpressure on the opening and closing of a pressure relief valve. Conversion kits are available for an easy change from a conventional design to a balanced bellows design. Conversion kits contain all necessary parts which must be replaced (bellows, spacer, spindle and gaskets). Please refer to page 56 Spare Parts. 50 LWN 47.48

Accessories and Options Metal Seat Metal Seat (Type 459) The LESER metal seats (disc and nozzle) are lapped to optical flatness to ensure a tight shut off. LESER safety relief valves are supplied with a standard leak tightness according to API 57. 57 57 Type 459 / Type 4593 Standard material for the disc is a hardened stainless steel. The combination of a hard disc material and a softer seat material () provides for improved wear resistance and longer product life. 7. 7. 7.3 7. 7. 7.3 Type 4594 Disc and seat are provided in material for highest corrosion resistance. Any other material which is available from bar stock can be supplied as well (e.g. Hastelloy, Monel, Alloy0, ). Metal seat Stellited sealing surfaces Materials subassembly Item 7 Item Part Name Type 4593 Body Material SG Iron Type 459 Body Material Carbon Steel Type 4594 Body Material Stainless Steel 7. 7. 7.3 57 Disc Hardened stainless steel Hardness 40 50 HRC Hardened stainless steel Hardness 40 50 HRC Lifting aid Retaining clip Pin 36 36 36 Item 7. Part Name Disc Inlet Body Optional stellited sealing surfaces stellited Hardness 40 45 HRC stellited Hardness 40 45 HRC Discs with stellited sealing surfaces For high temperature applications above 84 F, or applications with abrasive fluids wear resistant sealing surfaces are recommended. The sealing surfaces of the disc, seat or nozzle can be stellited by build-upwelding. The minimum thickness of the stellite is 0.06 inch. In addition to the corrosion resistance, the stellited surface also offers a high resistance to impact and sudden changes in temperature. LWN 47.49 5

Series 459 Threaded Safety Relief Valves Spring Loaded Accessories and Options Soft Seal Soft Seal O-ring disc (Type 46) Disc with sealing plate (Type 459, optional) Application Type 459 and 46 are provided with a soft seal disc for superior tightness maintained tightness close to the set pressure Features and Benefits two designs with o-ring or sealing plate for extended application range minimized leakage and product loss large selection of soft seal materials simple replacement of soft seal standard ARP o-ring sizes reduced maintenance costs one standard durometer per o-ring material 57 3 4 57 3 4 For temperature limits and medium resistance refer to the soft seal selection table. O-ring disc Type 46 Disc with sealing plate Type 459 Disc with sealing plate For applications, where the increased tightness of a soft seat seal is required but the temperature is too low or too high for an o-ring-disc, e.g. liquefied gases. Materials subassembly Item 7 Item Type 46 O-ring disc Item Type 459 Disc with sealing plate Part Name Material Part Name Material Disc Lifting aid Disc Lifting aid 3 Pin 36 3 Retaining clip 4 O-ring Refer to soft seal selection table 4 Sealing plate Refer to soft seal selection table 57 Pin 36 57 Pin 36 5 LWN 47.50

Accessories and Options Soft Seal Soft Seal Selection Code Designation Trade name Codeletter Option Code T min [ F] [ C] [ F] [ C] T max Application CR Neoprene (Chloroprene) K J -40-40 00 Paraffin oil, silicone oil and grease, water and waterbased solvents, refrigerants, ozone Type 46 O-ring NBR EPDM FPM (FKM) Buna-N (Nitrile-Butadiene) Buna - EP (Ethylene-Propylene - Diene) Viton (Fluorocarbon) N J30-3 -5 30 D J -49-45 30 L J3-4 -0 356 0 50 80 Hydraulic oil, vegetable and animal grease and oil Hot water and superheated steam up to 30 F, several organic and inorganic acids, silicone oil and grease, FDA compliant For high temperature service (no superheated steam), mineral oil and grease, silicone oil and grease, vegetable and animal grease and oil, ozone, FDA compliant compound available on request FFKM Kalrez (Perfluoro) C J0 3 0 48 50 Nearly all chemicals, standard compound is Kalrez 6375 with steam resistance, FDA compliant compound available on request Type 459 Sealing plate Notes: SP PCTFE PTFE Other VESPEL SP- (Polyimide) Kel-F (Polychlorotrifluoroethylene) Teflon (Polytetrafluoroethylene) T G A J49 J48 J44-454 -454-300 -70-70 -84 57 400 30 300 04 50 Please contact LESER LLC High temperature and high pressure applications (no steam), for chemical resistance refer to manufacturers guide Cryogenic and refrigeration application, flammable media, gaseous oxygene application up to 75 psig at 40 ºF Nearly all chemicals The code letters will be stamped on the retainer (Item ). For soft seal materials other than listed the code letter X will be used. Pressure and temperature service must be considered in any case. Set Pressure Limits Sealing plate disc Material [psig] VESPEL SP- 50 Kel-F.9 min. Pressure Range [bar] [psig] 0 5800 0. 4350 max. [bar] 400 300 Registered Trademarks Buna-N, Teflon, Viton, VESPEL SP-, Neoprene, Kalrez Buna EP Kel-F Company DuPont Bayer 3M Teflon.9 0. 45 0 LWN 47.5 53

Series 459 Threaded Safety Relief Valves Spring Loaded Accessories and Options Heating Jacket Heating Jacket Application Pressure relief valves in systems to be protected from media which are viscous, sticky or have a tendency to crystallize out of solution can be fitted with a heating jacket. For type 459 the outlet body is fitted with a fabricated heating jacket. The position of the heating connections is shown in the drawing. Balanced Bellows Design For safety relief valves with balanced bellows, the bonnet spacer required to house the bellows is fitted with an additional heating jacket. Both heating jackets are joined by a tubing. Specifications of the heating jacket The operating data for the heating jacket are shown on a separate name plate. Operating Pressure Operating Temperatures p max 60 psig T max 57 F Available heating connections Type 459 with heating jacket Connection Option Code Couplings FNPT H9 54 LWN 47.5

Accessories and Options Lift Indicator Lift Indicator (proximity switch) Lift indicators are an important component for automation. They are used to monitor operating status. As an option, Series 459 can be provided with an inductive proximity switch. The lift indicator will indicate an opening of the pressure relief valve when the vessel pressure has increased so that the valve opens with a pop. LESER provides DC proximity switches type N using two-wire technology. These intrinsically safe proximity switches can be used in explosion hazard area zone 0. Other types of switches can be used as well. B A 94 The lift indicator option is available for series 459 in combination with the packed lever H4 either with or without proximity switch. The connection size is M8 x. A = closed position B = open position Option Option Code Lifting device H4 with adaptor for lift indicator M8 x J39 Lift indicator type PEPPERL + FUCHS NJ5-8GK-N (5 V to 5 V d.c.) J93 LWN 47.53 55

Series 459 Threaded Safety Relief Valves Spring Loaded Spare Parts Discs Spare Parts Discs Type 459 metal to metal seat (Item 7) [Inch ] 0.044 0.099 Type 459 / 4593 Hardened stainless steel 00.039.9000 Type 4594 Steam and gas service: 00.369.98 Liquid service: 00.3969.98 00.049.9000 0.06 00.39.9000 00.49.9000 0.373 00.39.9000 00.49.9000 Discs Type 46 soft seal, disc material: (Item 7) [Inch ] O-ring size ARP-no. CR Neoprene K EPDM Ethylene D FPM (FKM) Viton L NBR Nitrile N FFKM Kalrez C 0.099 / x 3 /3 ARP 00.9349.905 00.9349.904 00.9349.907 00.9349.908 00.9349.909 0.06 9 /6 x 3 /3 ARP 3 00.4549.905 00.4549.904 00.4549.907 00.4549.908 On Request 0.373 3 /6 x 3 /3 ARP 7 00.4649.905 00.4649.904 00.4649.907 00.4649.908 On Request O-ring Type 46 soft seal (Item 7) [Inch ] O-ring size ARP-no. CR Neoprene K EPDM Ethylene D FPM (FKM) Viton L NBR Nitrile N FFKM Kalrez C 0.099 / x 3 /3 ARP 50.03.65 50.03.64 50.03.67 50.03.68 50.03.69 0.07 9 /6 x 3 /3 ARP 3 50.039.65 50.039.64 50.039.67 50.039.68 On Request 0.373 3 /6 x 3 /3 ARP 7 50.00.65 50.00.64 50.00.67 50.00.68 On Request 56 LWN 47.54

Spare Parts Inlet Bodies Inlet Bodies and Flanges Bellows Gaskets Inlet Bodies Type 459 / 46 Threaded connections Material (Item ) Male NPT Size [Inch ] Inlet Body / 36.6969.904 3 /4 0.044 36.7069.904 36.769.904 3 /4 36.7549.904 0.099 36.7649.904 / 36.7849.904 3 /4 36.8049.904 0.06 36.849.904 / 36.8349.904 36.3649.904 0.373 / 36.8649.904 Female NPT Size [Inch ] Inlet Body / /4 /4 / /4 0.044 0.099 0.06 36.6969.9 36.7069.9 36.769.9 36.7549.9 36.7649.9 36.7849.9 36.8049.9 36.849.9 / 36.8349.9 36.3649.9 0.373 / 36.8649.9 Bellows and Bellows Conversion Kits Material (Item 5) Valve Size Set pressure Bellows Conversion Kit all p 580 psig (40 bar) 400.7949.0000 50.050 all p > 580 psig (40 bar) 400.6349.0000 50.05 Note: The bellows for type 459 / 46 is back pressure compensating for orifice size 0.06 In (33 mm ). Gaskets Body Bonnet (Item 60) Valve Size Gasket Material all 500.407.0000 Graphite + 36 SS all 500.405.0000 Gylon (filled PTFE) LWN 47.55 57

Series 459 Threaded Safety Relief Valves Spring Loaded Approvals Series 459 Approvals Series 459 Coefficient of Discharge Country Code Type Fluid Approval No. ASME Certified K ASME Measured K D United States ASME Sec. VIII 459 / 46 S / G L 37 All 370 All 0.8 0.566 0.90 0.69 Canada CRN 459 / 46 S / G / L OG0730.9C All Refer to ASME-code Country Code Type Fluid Approval No. Certified Coefficient of Discharge K dr Europe PED 97/3/EC (CE-marking) 459 / 46 S / G L S / G L S / G L S / G L 0700 Z0008/0/3 0.044 0.099 0.06 0.373 0.8 0.70 0.83 0.6 0.8 0.53 0.79 0.5 α w Germany AD 000- Merkblatt A 459 / 46 S / G L S / G L S / G L S / G L TUEV-SV 909 0.044 0.099 0.06 0.373 0.8 0.70 0.83 0.6 0.8 0.53 0.79 0.5 China: SELO / AQSIQ (SQLBPV) Others Russia: Ship classification authorities: DIN GOST BV, DNV, GL, LROS, RINA Note: Acc. to ASME Sec. VIII the certified coefficient of discharge K is calculated by K = 0.9 * K D For sizing acc. to ASME Sec. VIII K must be used in the sizing equations. Type 46: K dr = 0.6 / α w = 0.6 58 LWN 47.56

Capacities US Units / Metric Units STEAM Type 459 / 46 STEAM ASME Section VIII [lb/hr] Capacities US Units STEAM ASME Section VIII [kg / hr] Capacities Metric Units [Inch ] Set pressure [psig] 0.044 0.099 0.06 0.373 5 8 509 0 55 34 586 30 96 40 74 40 4 504 93 50 87 599 085 60 33 693 56 70 377 788 47 80 43 88 599 90 468 977 770 00 53 07 94 0 604 60 84 40 695 449 66 60 349 785 638 969 80 389 876 87 33 00 430 966 06 3654 0 470 057 05 3996 40 50 48 394 4339 60 550 38 584 468 80 59 39 773 504 300 63 49 96 5367 30 67 50 35 5709 340 7 60 3340 605 360 75 69 359 6394 380 79 78 378 6737 400 83 87 3907 7080 500 034 36 485 879 600 35 779 5797 0505 700 436 33 674 8 800 638 3685 7688 393 900 839 438 8633 5644 000 040 459 9578 7357 00 4 5044 053 9070 00 443 5497 469 078 300 644 5950 44 495 400 84 6394 3340 474 500 306 6889 4373 000 433 955 987 500 560 604 698 Set pressure [bar] [mm ] 8. 63.3 33 4 5 7 87 8 330 3 7 44 44 4 47 306 555 5 76 368 667 6 06 430 780 7 36 493 893 8 66 555 005 9 96 67 8 0 45 36 679 3 7 385 804 456 4 98 445 98 68 6 4 505 053 907 8 5 564 77 33 0 77 64 30 358 304 683 46 584 4 330 743 550 809 6 357 803 675 3035 8 383 86 799 360 30 40 9 94 3486 3 436 98 048 37 34 463 04 73 3937 36 489 0 97 46 38 56 6 4 4388 40 54 0 546 463 50 675 58 368 574 60 807 87 3790 6868 70 940 5 44 7996 80 07 43 5035 93 90 05 7 5657 05 00 340 305 690 398 0 487 3345 6978 0 638 3685 7687 30 794 4036 84 40 956 440 983 50 6 4783 9980 60 305 586 08 70 496 565 76 80 70 6077 680 90 96 6583 3734 00 376 746 4909 Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure. Capacities at 30 psig (.07 bar) and bellow are based on 3 psig (0.07 bar) overpressure. LWN 47.57 59

Series 459 Threaded Safety Relief Valves Spring Loaded Capacities US Units / Metric Units AIR Type 459 / 46 AIR ASME Section VIII [S.C.F.M.] Capacities US Units AIR ASME Section VIII [Sm 3 /hr] Capacities Metric Units Set pressure [psig] [Inch ] 0.044 0.099 0.06 0.373 5 00 8 0 55 5 09 30 70 46 64 40 86 80 36 50 03 3 387 60 9 47 448 70 35 8 509 80 5 35 570 90 67 348 63 00 84 38 69 0 6 449 84 40 48 57 936 60 5 8 584 058 80 39 33 65 80 00 54 346 79 30 0 68 378 787 44 40 8 40 854 546 60 97 443 9 669 80 475 989 79 300 6 508 056 93 30 40 540 4 035 340 54 57 9 57 360 69 605 59 79 380 83 637 36 40 400 98 670 393 53 500 370 83 73 334 600 44 994 068 3744 700 54 56 405 4354 800 586 38 74 4965 900 658 480 3079 5575 000 730 64 346 686 00 80 804 3753 6796 00 874 966 409 7407 300 946 8 448 807 400 08 90 4765 868 500 090 45 50 000 450 36 6788 500 80 407 8473 3000 70 488 3500 530 569 4000 890 650 4500 350 733 5000 360 83 6000 4330 7000 5050 8000 5770 9000 6490 0000 7 000 793 [mm ] Set pressure [bar] 8. 63.3 33 4 68 303 7 43 440 3 57 36 590 4 96 409 740 5 36 49 89 6 76 575 04 7 36 658 9 8 356 74 34 9 396 85 493 0 94 436 908 643 9 56 074 944 4 65 596 40 46 6 300 676 406 547 8 336 756 573 848 0 37 836 739 349 407 96 905 3450 4 44 996 07 375 6 478 075 38 405 8 53 55 404 4353 30 549 35 570 4654 3 585 35 737 4955 34 60 395 903 556 36 656 475 3069 5557 38 69 555 335 5858 40 77 635 340 659 50 904 034 433 7664 60 08 434 5064 970 70 59 833 5895 0675 80 437 333 677 80 90 64 363 7558 3685 00 79 403 8389 590 0 969 443 9 0 47 483 005 30 35 530 0883 40 50 5630 75 50 680 609 546 60 857 649 3377 70 3035 688 409 80 3 78 5040 90 3390 767 587 00 3568 807 670 50 4455 004 300 5343 0 350 63 400 400 79 607 500 8894 600 0670 700 446 800 4 Capacities for air according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 60 F (6 C). Capacities at 30 psig (.07 bar) and below are based on 3 psig (0.07 bar) overpressure. 60 LWN 47.58

Capacities US Units / Metric Units WATER Type 459 / 46 WATER ASME Section VIII [US - G.P.M.] Capacities US Units WATER ASME Section VIII [0 3 kg/ hr] Capacities Metric Units [Inch ] Set pressure [psig] 0.044 0.099 0.06 0.373 5 8.8 34.0 0 0.. 38.4 30. 5.4 46.0 40 4. 9.3 53. 50 5.8 3.8 59.4 60 7.3 35.9 65. 70 8.7 38.8 70.3 80 9.9 4.5 75. 90. 44.0 79.7 00.3 46.4 84.0 0 4.4 50.8 9.0 40 6.4 54.9 99.4 60.5 8. 58.7 06 80 3.3 9.9 6.3 3 00 4.0 3.5 65.6 9 0 4.7 33. 68.8 5 40 5.4 34.5 7.9 30 60 6.0 36.0 74.8 35 80 6.6 37.3 77.6 4 300 7. 38.6 80.4 46 30 7.7 39.9 83.0 50 340 8.3 4. 85.6 55 360 8.8 4.3 88.0 59 380 9.3 43.5 90.5 64 400 9.8 44.6 9.8 68 500. 49.9 04 88 600 4.3 54.6 4 06 700 6. 59.0 3 800 8.0 63. 3 38 900 9.7 66.9 39 5 000 3.3 70.5 47 66 00 3.9 74.0 54 79 00 34.3 77. 6 9 300 35.7 80.4 67 303 400 37. 83.4 74 34 500 38.4 86.4 80 000 44.3 99.7 08 500 49.6 3 3000 54.3 3500 58.6 3 4000 6.7 4 4500 66.5 50 5000 70. 58 6000 76.8 7000 8.9 8000 88.6 9000 94.0 0000 99. 000 04 Set pressure [bar] [mm ] 8. 63.3 33 4 4.0 7.6.73 5.68 0.3 3 3.34 6.95.6 4 3.86 8.0 4.5 5 4.3 8.97 6. 6 4.7 9.83 7.8 7 5. 0.6 9. 8 5.45.3 0.5 9 5.78.0.8 0.7 6..7 3.0.97 6.68 3.9 5. 4 3. 7. 5.0 7. 6 3.43 7.7 6.0 9. 8 3.64 8.8 7.0 30.8 0 3.83 8.6 7.9 3.5 4.0 9.04 8.8 34. 4 4.0 9.45 9.7 35.6 6 4.37 9.83 0.5 37.0 8 4.53 0.. 38.4 30 4.69 0.6.0 39.8 3 4.85 0.9.7 4. 34 5.00. 3.4 4.4 36 5.4.6 4. 43.6 38 5.8.9 4.7 44.8 40 5.4. 5.4 45.9 50 6.06 3.6 8.4 5.4 60 6.64 4.9 3. 56.3 70 7.7 6. 33.6 60.8 80 7.67 7. 35.9 65.0 90 8.3 8.3 38. 68.9 00 8.57 9.3 40. 7.7 0 8.99 0. 4. 0 9.39. 44.0 30 9.77.0 45.7 40 0..8 47.5 50 0.5 3.6 49. 60 0.8 4.4 50.8 70. 5. 5.3 80.5 5.9 53.8 90.8 6.6 55.3 00. 7.3 56.7 50 3.6 30.5 300 4.8 33.4 350 6.0 36. 400 7. 38.6 500 9. 600.0 700.7 800 4. Capacities for water according to ASME Section VIII (UV), based on set pressure plus 0 % overpressure at 68 F (0 C). Capacities at 30 psig (.07 bar) and below are based on 3 psig (0.07 bar) overpressure. LWN 47.59 6

Series 459 Threaded Safety Relief Valves Spring Loaded Specification Sheet Specification Sheet Please fax to: 636 36 985 or your local representative Company: Phone: Page: of Location: Name: Reference: Fax: e-mail: Date: GENERAL Item No.: 9 Basis of Selection: Code: ASME VIII Tag No.: PED 97/ 3/ EC (CE-marking) Fire 3 Customer: Two phase flow 4 Equipment: other: 5 Enquiry/Order No.: 0 Documentation: Material test report 6 Delivery time: inlet body outlet body 7 Number of valves: bonnet: 8 Number of spare valves: other: SERVICE CONDITIONS Fluid and state: Steam (S) Gas (G) Liquid (L) Two phase Molecular weight: 0 Set pressure / units: 3 Coefficient C: Operating pressure / units: 4 Ratio of specific heats k: Cold diff. set pressure / units: 5 Compressibility factor Z: 3 Const. back pressure / units: 6 Spec. gravity / units: 4 Var. back pressure / units: 7 Viscosity / units: 5 Overpressure: 0 %... % 8 Relieving temperature / units: 6 Blowdown: 0 % 0 % 9 Required capacity / units:... % VALVE CONSTRUCTION 7 Designation: 8 Connection inlet Connection outlet 9 Size: Size: 30 Thread type or Flange class: Thread type or Flange class: 3 Facing type: RF RJ other: Facing type: RF RJ other: MATERIALS 3 LESER Material Code : Carbon Steel 3: SG Iron 4: Stainless steel 33 LESER Type 459 46 38 Soft seat CR NBR EPDM 34 Inlet Body: seal: FPM FFKM other: 35 Outlet Body: 39 Bellows: Hastelloy 36 Bonnet: Inconel other: 37 Disc (metal): SS hardened 40 Spring: high temp. alloy steel carbon steel other: stainless steel other: 4 Comply with NACE MR 075 Yes No ACCESSORIES AND OPTIONS 4 Lifting lever: plain H3 packed H4 cap H 44 Bellows: yes no 43 Test gag: yes no 45 Others (specify): SIZING AND SELECTION 46 Required orifice area / units: 47 Selected orifice area / units: 48 Coeff. of discharge: 49 Calculated capacity / units: Order Code 4. Please fill in these fields in any case. Please fill in these fields if possible. These fields will be completed by the supplier. 6 Article No. Set Pressure Connections Options Documentation Code and Medium LWN 47.60

First in safety a not so brief history of LESER History The company started in 88 as a brass foundry and over the decades developed a product portfolio of components for mechanical equipment and machines during the industrial revolution. At first LESER specialized on tough applications and its level gauges for steam boilers were famous. Soon, the company delivered their first safety valve and as a consequence of quick growing industrialization and improving demand for safety, LESER rapidly became the specialist for safety valves. Safe solutions from the specialist Today, LESER s product range includes 3 different designs with a variety of materials and sizes from / to 6, providing safe solutions for almost every application with Full lift safety valves High-pressure safety valves Safety valves according to API 56 Relief and safety relief valves Clean service safety relief valves Safety valves for critical service conditions Safety valves according to special standards and regulation Safety valves with supplementary pneumatic load Special versions Where to find LESER Headquartered in Germany, with a state-of-the-art factory and more than 90 employees, LESER is present through subsidiaries and qualified partners in over 40 countries, providing products and services worldwide. For the nearest source please contact us at: LESER LLC 664 Headland Drive Fenton, MO 6306 Phone: 636-343 - 8766 Fax: 636-36 - 985 e-mail: sales@leserusa.com www.leserusa.com Type 44 Type 459 Type 437 Type 488 Type 56 LESER s factory today LESER Headquarter 88 94