LESLIE CLASS DLO(S)-2 CAGE-RETAINED TRIM CONTROL VALVES ANSI CLASS

Transcription

1 LESLIE CLASS DLO(S)-2 CAGE-RETAINED TRIM CONTROL VALVES ANSI CLASS Page B

2 Leslie s Class DLO(S)-2 cage-retained control valves are designed for general purpose control of clean, dirty, viscous or corrosive liquids, as well as low to medium pressure, clean or dirty steam and gas service. The cage-retained seat design eliminates the need or use of any threaded internal parts insuring ease of maintenance and parts replacement even after years in corrosive service. Top entry design also permits easy access to all internal parts for inspection or maintenance without removal of the valve from the DESIGN FEATURES pipeline. The DLO-2 class also features the highest Cv capacity of any comparable single seated valve in the industry providing maximum flows and minimum pressure losses. Two point stem guiding provides rigid plug guiding and makes these valves especially suited for controlling dirty liquids or steam. Through-bolted bonnet on cast steel and stainless steel valves, in lieu of bonnet studs, makes valve servicing easy, even after many years of service in corrosive environments. Body Materials Class DLO(S)-2 control valves are available in several body materials to handle a wide variety of applications. Standard body materials include cast iron, carbon steel (DLOS-2), and 36 stainless steel (DLOS-2). Other materials are available on request. Two Point Stem Guiding The heavy duty stem is guided at the top and bottom of the bonnet by two guide bushings. Unlike single point guiding, this method minimizes trim wear and seat leakage caused by plug deflection and vibration. Stem guiding also eliminates any possibility of pumping of fluid as can happen with post guided globe valves by eliminating the bushing cavity where media can become trapped then pumped through the packing. Tight Shut-Off Seat material choices include 36 stainless steel seats with Stellite* alloy hardfacing providing ANSI Class IV or V shut-off, 36 stainless steel optional. An optional 36 stainless steel seat with a PTFE insert provides ANSI Class VI bubble-tight shut-off and Class IV metal-tometal back-up. End Connections DLO-2 Series valves are available in ANSI 25# 250#, and (DLOS-2) series in 50# and 300# class body ratings. Choice of standard end connections include threaded, socket weld, butt weld and raised face flanged. DIN flange end connections optional. * STELLITE is a registered trademark of Stoody Deloro Stellite, Inc. Page B2

3 Cage-Retained Trim Leslie Class DLO-2 valves feature no internal threaded parts making them ideally suited for handling corrosive fluids and insuring ease of parts removal even after years of service. The non-threaded seat ring is rigidly clamped into the valve body by the bonnet and the seat retaining cage. Reduced Trim Options Class DLO-2 Series control valves offer up to five different trim sizes and flow capacities for a given body size. Reduced trim options provide controllable Cv s from.02 to 57. For metering applications, Microtaper* trim provides Cv s as low as.0. Multiple trim selections provide optimized valve sizing, allow for future capacity increases, control of body velocities and easy correction of oversized valve problems. One Piece Stem/Plug One piece plug and stem eliminates any possibility of separation due to vibration and ensures correct plug/stem alignment at assembly for accurate seating and tight shut-off. Stem Wrench Flats Wrench flats on the stem provide convenient means for holding the valve stem during disassembly without risk of damaging the 8 micro-inch sealing surface. Bolted Yoke Conventional valves with the lock-nut actuator mounting design are easily ruined and scrapped due to corrosion. Leslie valves use a 4-bolt actuator mounting design which guarantees ease of disassembly no matter how corrosive the environment. APPLICABLE INDUSTRY STANDARDS All Leslie control valves are 00% factory tested and serialized. Leslie Controls quality assurance program is accredited and certified to ISO 900. All Leslie control valves are also designed, built and tested to meet the following industry standards. ANSI B.20. Pipe Threads - Conforms to pipe thread requirements. ANSI B6. Cast Iron Flanges and Flanged Fittings - Conforms to wall thickness, flange dimensions, materials, pressure/temperature ratings, markings and hydrostatic test requirements. ANSI B6.5 Pipe Flanges and Flanged Fittings - Conforms to flange thickness, diameter and drilling requirements. ANSI B6.0 Face-To-Face Dimensions - Conforms to globe style control valve face-to-face dimension requirements. ANSI B6.25 Butt-welding Ends - Conforms to requirements of Schedule 40 or Schedule 80 pipe, without backing rings. ANSI B6.34 Valves, Flanged and Butt-weld - Integral flanged and BWE valve conforms to wall thickness, materials, pressure/temperature ratings, markings, and hydrostatic test requirements. ANSI B6.37 Hydrotesting of Control Valves - Conforms to hydrotesting requirements. ANSI/ISA 70-2 Control Valve Seat Leakage - Conforms to Class III, IV, and V shutoff requirements. ISA S75.0 Flow Equations for Sizing Control Valves. ISA S75.02 Control Valve Capacity Test Procedure - Conforms to flow capacity test procedure requirements. ISA S75.03 Uniform Face-To-Face Dimensions for Flanged Globe Style Control Valves - Conforms to faceto-face dimension requirements. ISA S75.2 Face-To-Face Dimensions for Socketweld End and Screwed End Globe Style Control Valves - Conforms to face-to-face dimension requirements. ISA S75.5 Face-To-Face Dimensions for Butt-weld End Globe Style Control Valves - Conforms to face-toface dimension requirements. MSS SP25 Standard Marking System for Valves, Fittings, Flanges, and Unions - Conforms to marking requirements for flanged, screwed and weld end fittings. MSS SP84 Steel Valves, Socketweld End and Threaded End - Conforms to end connection requirements. In addition, when required, Leslie control valves can be manufactured and tested in compliance with: CAN 3 Z299.3 ANSI N45.2 MIL-I-STD MIL-I B 3. Assessed and certified by ABS, Houston, Texas * MICROTAPER is a registered trademark of Leslie Controls, Inc. Page B3

4 GENERAL SPECIFICATIONS BODY ASSEMBLY: Style: Single seated, top entry bolted bonnet, globe style body, cage retained seat, unbalanced plug ANSI Body Ratings: Cast Iron: Class 25 & 250 (DIN ND6 & ND25) Steel and alloys: Class 50 & 300 (DIN ND 6 & ND40) BODY/BONNET MATERIALS: Cast Iron, ASTM A26 Class B Carbon Steel, ASTM A26 Gr WCB 36 stainless steel, ASTM A35 Gr CF8M Note: See ANSI B6. (cast iron) or ANSI B6.34 (other materials), or Leslie Engineering Data Sheet 5/0.3.3 for pressure/temp. limits of body/bonnet assemblies. SIZES: 2" - 4" END CONNECTIONS: ANSI Class 25/50 Integral Flanged, "- 4" ANSI Class 250/300 Integral Flanged, "- 4" Threaded, NPT - 2"- 2": Cast iron - ANSI Class 250 rated Steel & alloys - ANSI Class 300 rated Socket weld ends (Sch. 40) 2" - 2" Butt weld ends (Sch. 40) 2 2" - 4" END CONNECTIONS (cont'd.): DIN Flanges: ND-6, ND-25, ND-40, ND-00 BONNET: Through-bolted bonnet BODY/BONNET BOLTING: ASTM A-93 GRB7 Studs ASTM A-94 GR2H Nuts STEM PACKING: PTFE V-Rings, -40 to 460 F (-22 to 238 C) Braided PTFE/Graphite (Split-ring), -40 to 500 F (-22 to 260 C) Laminated Graphite,-320 to 800 F (-95 to 426 C) PACKING STUDS, NUTS & FOLLOWER: 300 Series Stainless Steel GASKETS: Body gasket: Spiral wound AISI Type 36L Seat/Body Gasket: DLO-2 - Filled PTFE, 460ºF (238ºC) DLOS-2 - Graphite filled Inconel* ºF (399ºC) TRIM SIZES: Full, reduced port FLOW CHARACTERISTICS: Linear or equal percent - standard Modified linear - optional SHUT-OFF CLASS: Metal/metal seats - ANSI/ISA 70-2 Class IV, Class V optional to 750ºF (399ºC) Metal/PTFE seats - ANSI/ISA 70-2 Class VI, bubble-tight to 460ºF (238ºC) TYPICAL SPECIFICATION All globe style control valves shall be designed, built and tested in accordance with the following industry standards: ANSI B.20. ANSI B6.0 ANSI\ISA 70-2 MSSSP25 ANSI B6. ANSI B6.34 ISA S75.0 MSSSP84 ANSI B6.5 ANSI B6.37 ISA Control Valves shall be single seated globe style body with bolted bonnets. Valves shall have cage-retained seat trim and contain no internal threaded parts. Valve trim shall be 36 stainless steel or 36 stainless steel with Stellite alloy overlay. Specified valve plug and stem assembly shall be of an integral one piece design threaded and pinned connections are not acceptable. Valve stems shall be of 36 stainless steel with an 8 micro-inch finish or better, and provided with wrench flats at the top. Valves shall be designed to accept two reduced trim options. Valves shall be provided with two replaceable stem guides of Nitronic** 60 or equal. Actuators shall be of the spring and diaphragm type, normally open or normally closed, as specified. Actuators shall have an external spring adjusting nut to facilitate bench set adjustments. Adjustable packing shall be provided by means of a packing follower, packing clamp, studs and nuts, all of 300 series stainless steel construction. * INCONEL is a registered trademark of Huntington Alloy, Inc. ** NITRONIC is a registered trademark of Armco, Inc. Page B4

5 Temperature ºF Metal Seated Trim Pressure Drop (MPa) Stellite Trim Trim Pressure Drop (psi) Temperature ºC TRIM SELECTION DATA Temperature ºF Soft Seated Trim Pressure Drop (MPa) Soft Seated Trim Pressure Drop (psi) Temperature ºC % of Capacity Inherent Flow Characteristics Microtaper Linear Equal Percentage % of Travel LINEAR Note: 36 stainless steel body required below 20 F See page 6, Table for material specifications Metal seat Class IV shut-off to 750 F (399 C) PTFE soft seat Class VI shut-off to 460 F (238 C) Linear Contoured Equal Percentage Microtaper Valve Full Port Cv s-reduced Trim Size Cv 4"MT 4" 2" 3 4" " 2" 2" 2 2" 3" Page B5

6 TRIM MATERIAL SELECTION Maximum ANSI/ISA Trim Service Guide 70-2 Material Temp. Plug* Seat Ring Stem Cage Bushings Shut-off ºF/50 F AISI AISI AISI ASTM Trim (232ºC/398 C) Type 36 Type 36 Type 36 A35 CF8M Nitronic 60 IV,V** 36 Stellite 750 F AISI Type AISI Type AISI ASTM Trim (398 C) 36 Stellite 36 Stellite Type 36 A35 CF8M Nitronic 60 IV,V** 36 Soft-seated 460 F AISI ANSI Type 36 AISI ASTM Trim (238 C) Type 36 PTFE Insert Type 36 A35 CF8M Nitronic 60 VI * Microtaper plugs are solid Stellite alloy ** on application *** 450 F when used with cast iron bodies. PACKING CONFIGURATIONS LIVE-LOADED PTFE - V-RING (PRESSURE) Live-loaded PTFE V-ring packing provides the most maintenance free stem seal. The V-ring packing is both pressure energized and live-loaded by a 36 Stainless Steel spring to automatically compensate for packing wear. Maximum service temperature is 460 F (238 C). V-rings can be inverted for vacuum service. PTFE/GRAPHITE Split rings allow packing replacement without removal of actuator. Graphite impregnated PTFE provides 500 F (260 C) service temperature, better memory and sealing than pure PTFE rings, lowered stem hysteresis, and is ideal for fluids that contain suspended particles. DOUBLE-PTFE WITH BLEED, PURGE Two sets of packing rings separated by a 36 stainless steel lantern ring can provide zero stem leakage and prevent fugitive emissions. Bonnets are /4" NPT drilled/tapped for connection of lubricators, water seals, bleed-off or positive inert gas purge. Maximum temperature 500 F (260 C). Rangeabilities 4" MT (Microtaper ) 55: 4-2" Trim 25: COMBINATION PRESSURE/ VACUUM PACKING Inverted sets of PTFE V-ring packing provide tight sealing in valves which may be controlling pressure or vacuum at different times. Max. temperature 500 F (260 C). LAMINATED GRAPHITE Precision die-cut laminated graphite rings provide a reliable, tight stem seal to operating temperatures of 800+ F (426 C) " Trim 35: 2 2-3" Trim 40: 4" Trim 50: Page B6

7 DIMENSIONS CONTROL VALVE CAST IRON CONTROL VALVE CAST STEEL & ST. STEEL DIMENSIONS IN INCHES DIMENSIONS IN INCHES SIZE A B C D* WGT.* SIZE A B C D* WGT.* /2 7-3/4 THREADED 2-3/8 5-3/6 2-3/8 54 lb. / THREADED /4 7-3/4 2-3/8 5-3/6 2-3/8 54 lb. 3/ /4 2-3/8 5-3/6 2-3/8 54 lb. 7-3/4 2-/4 5-3/6 2-3/8 5 lb. -/2 9-/4 2-3/8 7-/2 2-3/8 63 lb. -/2 9-/4 2-3/8 7-/2 2-3/8 62 lb. 2 0-/ /4 5-/4 70 lb. 2 0-/ /4 5-/4 69 lb. 25 LB ANSI FLANGE STANDARD 50 LB. ANSI FLANGE STANDARD 7-/4 2-/8 5-5/8 2-3/8 54 lb. 7-/4 2-/4 5-5/8 2-3/8 54 lb. -/2 8-3/4 2-/2 7-3/8 2-3/8 70 lbs. -/2 8-3/4 2-/2 7-3/8 2-3/8 70 lb /8 5-/4 9 lb /2 7-5/8 5-/4 9 lb. 2-/2 0-7/8 3-/2 8 5-/4 08 lb. 2-/2 0-7/ /4 07 lb. 3-3/4 3-3/4 8-3/8 5-/4 30 lb. 3-3/4 3-3/4 8-3/8 5-/4 27 lb /8 3-/2 0-/8 9-5/8 23 lb /8 4-7/8 0-/8 9-5/8 27 lb. 250 LB. ANSI FLANGE STANDARD 300 LB. ANSI FLANGE STANDARD 7-3/4 2-/8 5-3/6 2-3/8 56 lb. 7-3/4 2-/4 5-3/6 2-3/8 56 lb. -/2 9-/4 3-/6 7-/2 2-3/8 70 lbs. -/2 9-/4 3-/6 7-/2 2-3/8 72 lb. 2 0-/2 3-/4 7-3/4 5-/4 95 lb. 2 0-/ /4 5-/4 95 lb. 2-/2 -/2 3-3/4 8-3/6 5-/4 4 lb. 2-/2 -/2 3-7/8 8-3/6 5-/4 6 lb. 3 2-/2 4-/8 8-/2 5-/4 4 lb. 3 2-/2 4-/8 8-/2 5-/4 38 lb. 4 4-/ /6 9-5/8 248 lb. 4 4-/2 4-7/8 0-5/6 9-5/8 236 lb. DIMENSIONS IN MILLIMETERS DIMENSIONS IN MILLIMETERS SIZE A B C D* WGT.* SIZE A B C D WGT.* THREADED THREADED kg kg kg kg kg kg kg kg DIN 2533 FLANGE STANDARD (ND-6) DIN 2543 FLANGE STANDARD (ND-6) kg kg kg kg kg kg kg kg kg kg DIN 2534 FLANGE STANDARD (ND-25) DIN 2545 FLANGE STANDARD (ND-40) kg kg kg kg kg kg kg kg kg kg kg kg Spring & Diaphragm, Standard Piston, Double Acting/Spring Return Electric Electro-Hydraulic Spring and Diaphragm Actuators Leslie spring and diaphragm actuators are available for Class DL0-2 valves in three different sizes, from 35 to 85 square inches in diaphragm area, both in direct (fail open) and reverse (fail closed) action. Leslie actuators feature long strokes, constant effective diaphragm area for linear response and high operating pressures (to 60 psi) to minimize actuation costs. Leslie actuators also feature a 4-bolt yoke mounting method (not bonnet lock-nut) to insure ease of disassembly, even after years in corrosive service. ACTUATORS As standard options, a variety of accessories can be yoke mounted including: Positioners, Pneumatic/Electro-Pneumatic I/P Transducers Proximity or Limit Switches Position Transmitters Solenoid Valves Integral Filter/Regulators A manual override hand operating device (HOD) is also available for manual valve operation or use as a valve travel limit stop. See product data sheets 0/0.2. and 0/0.2.2 for complete specifications. Page B7

8 D(D)LO(S)-2 CONTROL VALVES CODE SELECTION CHART Class Material Valve End Actuator Bonnet Trim Accessories Size Conn. Packing U 8 5 A A D F Class - Position U Material - Position 2, 3 & 4 85 = Iron 853 = Carbon Steel 854 = SST Valve Size - Position 5 A = 2 B = 3 4 C = E = 2 F = 2 G = 2 2 H = 3 J = 4 End Connection - Position 6 = Threaded 2 = Flanged 25/50 3 = Flanged 250/300 4 = SWE (steel only) 5 = BWE (steel only) 6 = ND6,ND0/6 7 = ND40 (steel only) 0 = Other (Specify) * 55A(R) used on 2"-3" D(D)LO(A)(S)-2 only. 55R used on all other applicable valves. Does not include spring or mounting kit. CODE SELECTION CHART Actuator - Position 7 A = 35 B = 35R C = 35 HOD D = 35R HOD E = 55 F = 55R G* = 55A H* = 55AR I = 55 HOD J = 55R HOD K* = 55A HOD L* = 55AR HOD M = 85 N = 85R P = 85 HOD Q = 85R HOD Bonnet& Packing - Position 8 = Std. Bonnet, Braided Teflon Graphite Pkg. 2 = Std. Bonnet, Teflon Pkg. 3 = Std. Bonnet, Laminated Graphite Pkg. 4 = Std. Bonnet, Double Teflon Pkg. Accessories - Position 0 = No Accessories Mounted -8 = Actual Number of Accessories Mounted Trim - Position 9 & 0 Equal %, SST 36 BF = 4 DF = 2 GF = 3 4 JF = LF = 2 MF = 2 NF = 2 2 PF = 3 RF = 4 Equal %, Resilient Seat DG = 2 GG = 3 4 JG = LG = 2 MG = 2 NG = 2 2 PG = 3 RG = 4 Equal %, SST 36 Stellite BH = 4 DH = 2 GH = 3 4 JH = LH = 2 MH = 2 NH = 2 2 PH = 3 RH = 4 Linear, SST 36 BJ = 4 DJ = 2 GJ = 3 4 JJ = LJ = 2 MJ = 2 NJ = 2 2 PJ = 3 RJ = 4 Linear, Resilient Seat DK = 2 GK = 3 4 JK = LK = 2 MK = 2 NK = 2 2 PK = 3 RK = 4 Linear, SST 36 Stellite BL = 4 DL = 2 GL = 3 4 JL = LL = 2 ML = 2 NL = 2 2 PL = 3 RL = 4 Microtaper is available in /4" Stellite only Code BB. Resilient seat DLOA, DLOAS available with full size trim. TRIM BODY SIZE (IN) ACTUATOR DIA CV STROKE (R) 55 (R) 55A(R) 85(R) 4MT X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 2 57 X X X X X X X X X X X X Consult Factory for availability. Page B8