Index SECTION LIST No. DESCRIPTION PAGE No. GENERAL INFORMATION General Information Selection of Valve Types /0, /0 /0 VALVE TYPE FL (STANDARD PREURE SERIES) Method of Model Numbering /0 General Arrangement & Assembly Drawing /0, /0 Standard Materials Overall Dimensions Discharge Capacities /0 /0 /0, /0, /0 Accessories /09 to / Instructions for Installation / to / VALVE TYPE FL (HIGH PREURE SERIES) Method of Model Numbering /0 General Arrangement Drawing /0 Standard Materials Overall Dimensions Discharge Capacities /0 /0 /0, /0 Accessories Refer to /09 to / Instructions for Installation Refer to /, /, / VALVE TYPE FL 9 SERIES Method of Model Numbering /0 General Arrangement & Assembly Drawing /0, /0 Standard Materials Discharge Capacities Overall Dimensions /0, /0 /0 Accessories Refer to /09, /0 Instructions for Installation Refer to /, /, / FAINGER LESER April 00 I
Index SECTION LIST No. DESCRIPTION PAGE No. VALVE TYPE FL 9 SERIES Method of Model Numbering /0 General Arrangement & Assembly Drawing /0, /0 Standard Materials Overall Dimensions Discharge Capacities /0, /0 /0 Instructions for Installation Refer to /, / & / VALVE TYPE FL 9 SERIES Method of Model Numbering /0 General Arrangement & Assembly Drawing /0, /0, /0 Standard Materials Overall Dimensions Discharge Capacities /0 /0 /0 Accessories /09, /0 Instructions for Installation Refer to /, /, / SIZING OF SAFETY VALVES Sizing Calculations Acc. to AD-Merkblatt 000-A, ISO /0 Sizing Calculations Acc. to ASME Sec. VIII, Div. /API RP Sizing Calculations Acc. to IBR 9 Standard Specification Sheet /0, to /0 /0 /0 APPROVALS /0 to /0 CAPACITY TESTING FACILITY 9 9/0 to 9/0 LESER AT A GLANCE 0 0/0 to 0/0 II FAINGER LESER April 00
Method of Model Numbering For Valve Type FL 9 Series 9 / C S X FL 9 MODEL No. 9/CSX ORIFICE DESIGNATION MATERIAL TYPE CONNECTION RATING FOR INLET & OUTLET SPECIAL FEATURES/EXTRA ACCEORIES 'X' FOLLOWED BY THE FOLLOWING NOS. 0 0 0 0 9 0 0 FLOW DIA 0. Note: For Flow dia., the model No. would read as /... C - CS, ASTM A WCB ( 0 TRIM) C - CS, ASTM A WCB ( TRIM) S -, ASTM A CF ( 0 TRIM) S -, ASTM A CF ( TRIM) S -, ASTM A CF M ( TRIM) L -, ASTM A CF ( 0L TRIM) L -, ASTM A CF M ( L TRIM) 00 - OTHER, TO SPECIFY HS - ASTM A GR. WC ( TRIM) LS - ASTM A GR. LCB ( TRIM) AY - ALLOY - 0 (ALLOY - 0 TRIM) HY - HASTELLOY - 'C' (HASTELLOY- 'C' TRIM) SP - SPECIAL A - ANSI # B - ANSI # C - ANSI 00 # D - ANSI 900 # E - ANSI 0 # F - ANSI 0 # 0 - OTHER, TO SPECIFY S - SCREWED - PN 0 - PN - PN - PN - PN - PN 00 - PN 0 0 - OTHER, TO SPECIFY - OPEN BONNET - JACKETED TYPE - TEST GAG - 'O' RING DISC - STELLITED INLET (SEAT) & DISC - DRAIN PLUG CONSTRUCTION TYPE C - CONVENTIONAL O - OTHER, TO SPECIFY SPRING MATERIAL 0 - OTHER, TO SPECIFY - CS CD. PLATED - STAINLE STEEL STANDARD ACCEORIES 0 - OTHER, TO SPECIFY - CLOSED, SCREWED CAP - PACKED LEVER CAP NOTE FLF - 9 is for Flanged type and FLS - 9 is for Screwed type construction. PROCEDURE FOR VALVE SIZING & SELECTION Valves manufactured by FAINGER LESER are based on DIN design. Relieving capacity of the selected valve would meet the customer required capacity. Sizing calculations are according to DIN 0 / TRD, AD-Merkblatt 000 - A, ISO or ASME Sec. VIII Div. / API RP, where applicable. These valves are approved by the CCoE (Chief Controller of Explosives), Nagpur. FAINGER LESER Valves are tested for seat leakage according to API. FAINGER LESER April 00 /0
FL 9 Safety Valve with Packed Lever Cap, H (Screwed Type FLS-9) 9 9 9 ~ H 0 a + c c a 0 b /0 FAINGER LESER April 00
Safety Valve with Packed Lever Cap, H (Flanged Type FLF-9) FL 9 9 9 H ~ 9 0 d 0 e FAINGER LESER April 00 /0
FL 9 Assembly of a Spring Loaded Safety Valve *= Basic valve assembly fitted with *and * Item Part Name 90 9 * * * 9 9 9 0 Inlet Body Outlet Chamber Disc Compl. Spindle Guide Bonnet Spindle Split Ring Spring Plate Adjusting Screw Lock Nut Name Plate Spring Pin Securing Ring Gasket Ball 9 * * = Cap H, gastight no lifting gear Cap H Spacer Lead Seal Seal Wire 9 0 0 9 * *= Lifting Gear H, gastight construction 9 Lever Cover H Lever H Lifting Fork Shaft Spindle Cap Pin Spacer O ring Supporting Ring/Gland Circlip Lead Seal Seal Wire /0 FAINGER LESER April 00
Standard Materials FL 9 TYPE PART No. PART NAME STANDARD MATERIAL (Also Refer to Method of Model Numbering for Details) C / C S / S / S SPECIAL- C L O S E D C A P, H PACKED LEVER, H 9 9 9 0 INLET BODY OUTLET CHAMBER DISC SPINDLE GUIDE BONNET SPINDLE SPLIT RING SPRING PLATE ADJUSTING SCREW LOCK NUT CAP () INLET FLANGE SPRING ROLL PIN SECURING RING GASKET BALL SPACER LEAD SEAL SEAL WIRE LEVER LIFTING FORK LEVER SHAFT SPINDLE CAP PIN GLAND HEX. NUT A Gr. WCB A Gr. WCB CS CD. PLATED A Gr. WCB CS CS CD. PLATED C.A.F. / NON ASB. C.A.F. / NON ASB. LEAD MS CS CS CS A Gr. CF /M A Gr. CF /M A Gr. CF /M C.A.F. / NON ASB. C.A.F. / NON ASB. LEAD MS CS HASTELLOY-C/MONEL A Gr. CF M HASTELLOY-C/MONEL AISI A Gr. CF M AISI AISI AISI AISI AISI A Gr. CF M AISI C.A.F. / NON ASB. / PTFE C.A.F. / NON ASB. / PTFE LEAD MS CS AISI AISI AISI NOTE Material of construction will vary according to the service conditions and customer requirement. Other special materials, for example, Monel, Alloy-0, CF, CF M and accessories such as Test Gag, Heating Jacket, Drain Plug, Soft Seat (O-Ring) Disc etc.. can be provided on request. TEMPERATURE Vs. MATERIAL OF CONSTRUCTION SPRING 0 C - -0-0 00 0 F - - 9 000 DIN.0 () DIN.00 (CS) DIN.9 (ALLOY STEEL) BODY 0 C - -0-9 0 F - - - 0 000 ASTM A LCB ASTM A WCB ASTM A CF /M ASTM A WC Note: The above material is for standard construction. Suitable material to be used for corrosion resistant/special application. FAINGER LESER April 00 /0
FL 9 Overall dimensions FLANGED TYPE (FLF-9 Series) Sl. No. Inlet Size Outlet Height (approx) H Center to face Inlet d Outlet e Weight Approx. kgs. Designation Orifice Details Area sq. in. sq. Dia. d Flow dia do * 90.0 0 0.0...@ 0 90.0 0 0.0.0.0.@ 90. 0 0.0..0.@ 90. 0 0..00 9.. 90.0 0..00 9.. 0 9.0 9 0.9..9 0 9. 0 0.9..9 0 9. 0 0.0 9.0. 9 0 9.0 0.0 9.0. SCREWED TYPE (FLS-9 Series) Sl. No. Inlet Size Outlet Height (approx) H Center to face Inlet a + c Outlet b Weight Approx. kgs. Designation Orifice Details Area sq. in. sq. Dia. d Flow dia do * 90.0 0 0.0...@ 0 90.0 0 0.0.0.0.@ 90.0 0 0.0..0.@ 90.0 0 0..0 9.. 0.0 9 0.9..9.0 0 0.9..9 0. 0 0.0 9.0..0 0.0 9.0. NOTE @ The flow Dia 'do' shall be.0 for set pressure above.0 bar g while using C.S. Spring and 9.0 bar g while using S.S. Spring. * Outlet size of is standard, however, 0 can also be provided on request for flow Dia,.0 Special sizes & connections or different center to face dimensions etc. can also be provided on request. /0 FAINGER LESER April 00
Discharge Capacities FL 9 Calculation of mass flow according to AD-Merkblatt 000 - A, ISO I- Saturated Steam kg/h II - Air at 0 C ( F) and 0, mbar absolute (scm/h) III - Water at 0 C ( F) m³/h(0³ kg/h) do, do, do p(barg) I II I II III I II III p(barg) I II I II III I II III p(barg) II 0, 0, 99, 9, 9, 0, 9 9,, 90 0, 9, 0 0 9, 9, 9 9, 90,,, 0, 99 9,9 9, 9 9, 9, 0,, 0 0, 0, 0 09,0, 0,, 0 0, 0,0 0 0,,,0,9 0 9 9,,0 9 9 90,, 99 0 9,9, 0 0 9,0 9, 90 0 0, 99, 9 9, 9, 00 9 0, 0, 9 9 9,9 9,0 0 0 0, 909 9, 0, 9, 0 09,9 00, 90 0, 0, 0 0 009,0 9,9 0 9,,9 9, 0 9, 9 9, 9 09,0 9 0, 0 0, 0,, 9,, 9,0 9, 0 0,0 9, 9,0 9 9, 0, 99 9 9, 9, 90, 0 9 0 0,, 9, 909 0,, 00 9, 0 9, 9, 0 9, 09 9, 9 9, 0 09 9 9, 0 9,0, 9 0 0 9, 0, 0 FAINGER LESER April 00 /0
Accessories FL 9. Safety Valves with Heating Jacket Safety Valve can be fitted with a heating jacket for special applications. Areas of application are systems to be protected from media, which are viscous, sticky or have tendency to crystallize out of solution. Outlet Chamber, item, is fitted with heating jacket. The heating connections of these Safety Valves shall be / NPT female G A G Type 9 0 Heating connections turned at 90 as shown above R C C Arrangement of heating connections for Type 9 R FAINGER LESER April 00 /09
FL 9 Accessories. Safety Valves with Test Gag In order to allow the adjustment of each Safety Valve in a plant provided with several Safety Valves or to carry out a pressure test above the allowable operating pressure a test gag is required. The test gag is fitted in the lever cover and exerts force on top of the spindle. After testing the test gag shall be removed.. Safety Valves with Lift Stopper That Safety Valves are only available in standardized nominal diameters, the valve could in a given application be oversized. It is therefore recoended to reduce the lift by means of a lift stopper, thus reducing the coefficient of discharge in addition. Lift limitation by gag /0 FAINGER LESER April 00
Instructions for the Treatment and Installation of Pressure Relief Valves. FL. General Notes Pressure Relief Valves are highly quality instruments which should be handled with great care. To ensure the correct performance of a pressure relief valve all parts are made with exact precision. Only this precision ensures the correct functioning of the pressure relief valves. Careless handling of the finished valve in workshops, stores, during transportation or installation could cause leakage or possibly permanent damage (also refer to API Report Guide for inspection of refinery equipment, Chapt. XVI Pressure Relieving Devices" Para 00 and 00). The sealing surfaces have been ground and lapped with high precision to ensure the required tightness. Even though the surfaces are extremely hard, the seal can still be damaged. By all means, one must take care to prevent impurities from entering the valve during transportation, installation and operation. When installing pressure relief valves with threaded connections, use only metal seal washers. Seal materials such as hemp or PTFE tape should not be used as this type of material can break off and enter the valve causing it to leak. If valves with open bonnets and/or levers are to be painted after despatch from the factory, care must be taken to protect the sliding parts. Otherwise the correct operation of the pressure relief valve may be affected.. Transport Protection The inlet and outlet of the pressure relief safety valves are protected during transportation with plastic caps. These caps should only be removed just before installing the valve. The lifting lever of spring loaded pressure relief valves is secured with a wire to the bonnet. This wire should be removed only after installation. For testing the set pressure or tightness of the pressure relief valve remove also this wire and take care that the lever is not engaged with the spindle cap.. Installation/Assembly. General Notes Spring loaded pressure relief valves should be installed with the bonnet VERTICALLY UPWARDS. Furthermore, pressure relief valves should be mounted in such a way that no inadmissible static, dynamic or thermal loads can be transmitted to the valve due to up and downstream pipe work. If necessary, expansion possibilities should be provided. Stresses by incorrect mounting should be avoided. According to rules a drain hole of sufficient size must be incorporated at the lowest point of pipe work. In all cases the discharge pipe must first slope in a downwards direction and fitted with a suitable size drain hole before any bends are connected (refer to sketch). Exception: In special cases, for instance on board of ships an optional drain hole may be recoended in the valve body as it may be that pipe work drainage cannot be guaranteed at a lower point than the valve. The standard drain hole which will then be supplied by the factory is /" BSP. But, by all means, the discharge pipe must be drained too. In extreme cases this hole can be drilled outside of our factory provided that special care is taken to ensure that no damage is done to the sealing surfaces. All drainage pipes that have been connected must be free of restriction and the ends easily seen. Care must be taken when discharging any drainage to prevent injury to personnel. For example on steam connect a suitable steam trap. Note! When valves are supplied with a drain hole that is not going to be used the plastic plug fitted in the hole must be removed and replaced by a metal plug.. Mounting Brackets For pressure relief valves with mounting brackets a fastening possibility for the brackets should be provided to withstand the forces of reaction when valve blows off. The bracket holes can be drilled on request.. Insulation In case any insulation of the pressure relief valve is provided, the bonnet must be kept free to avoid unacceptable heating up of the spring.. Inlet Pipe The inlet pipe for pressure relief valves should be as short as possible and should be so arranged, that when the valve is in its fully open position the pressure drop the must not exceed % of set pressure, the edging at inlet pipe should be rounded off or at least be chamfered. If the calculation results in a higher than % pressure drop of set pressure then the inlet pipe size must be enlarged.. Draining of Condensate To prevent dirt and all kinds of impurities from the pressure relief valve the drainage of discharge pipe be. Discharge Pipes/Back Pressure The discharge piping on vapours and gases should installed in an ascending direction, on liquids in an FAINGER LESER April 00 /
FL Instructions for the Treatment and Installation of Pressure Relief Valves. The discharge pipework of all pressure relief valves should be so arranged that the back pressure, which is built up during blow off, does not exceed a max. % of set pressure. In case of higher back pressure, pressure relief valves with pressure compensating metal bellows (balanced type) shall be used. In case the back pressure is >0. times set pressure the capacity of the pressure relief valves must be recalculated.. Pressure Relief Valves with bellows Pressure relief valves with elastomer bellows (TRD ) as well as metal bellows have a vent hole in the bonnet. When fitting pressure relief valve with a vent hole care must be taken to prevent moisture from entering the bonnet. However, fluid escaping from the vent hole indicates that the bellows have failed. Repair is required. When pressure relief valves with bellows are used with toxic or inflaable fluids, care must be taken to fit a suitable vent pipe to provide safe venting. For this purpose, the vent can be threaded /" BSP female on request.. Mode of Operation/Maintenance The working pressure of the plant should be at least % below the blow down pressure of the valve to enable a correct reseat. When a slight leakage occurs, due to deposits between the sealing surfaces, surfaces can be cleaned by operating the lifting lever causing the valve to blow off. The valve should be closed by sudden release of the lever. If this procedure does not stop the leakage, the valve seals are probably damaged. Repairs should be carried out at our It is recoended and in Germany required by Rules to lift manually the valve lifting lever from time to time in order to prevent accumulation of deposits that will affect valve operation. For steam generators, the following requirements are established in the German Technical Rules for Steam Boilers TRD 0, edition., Section. "Testing of pressure relief valves is required for plants operating with demineralized water and for hot water generators at intervals of at least months, with the exception of power plants. For other steam generators, the test interval should not exceed weeks". It is important to ensure that the lifting lever does not engage the spindle cap after the lift operation. The lever must be deflected towards the center line of the bonnet until the lifting fork is disengaged. For pressure relief valves with open bonnet, a drain groove is provided in the guide flange. Whilst blowing, condensate escaping through the clearance between guide disc and spindle is drained through this groove. According to DIN specification, Oct. Edition "Explanations", Para. pressure relief valves represent the last step in the line of protection for the vessel, and they should be able to prevent excess pressure when all other automatic or pilot operated checking instruments have failed. To guarantee this function pressure relief valves require, like all other technical equipment, regular service. How often a valve must be checked, depends on the actual operating conditions, so that no general indications can be given. Usually pressure relief valves operating in a corrosive atmosphere or on laden fluids require service more often than valves operating clean conditions. This also applies if the pressure relief valve operates frequently causing a higher wear out to the seat and disc. Special consideration is required if conditions such as vibration (to be avoided, if possible) pressure pulsation and/or Add, drain pipe in case of prepared drain hole / FAINGER LESER April 00
Dismantling and Assembly Instructions For Valve Type FL, FL 9 & FL 9 Series FL. Loosen the existing lead seal.. Press the lever () towards the middle until it reaches the stop so that the lifting fork() no longer holds the spindle cap ().. Loosen and remove the lever cover ().. Loosen the spindle cap () from the spindle (), remove the securing ring (9) and the pin ().. Loosen the lock nut (9) of the adjusting screw ().. Turn the adjusting screw () anticlockwise to remove the all spring tension.. Remove the hex. nuts () from the flange of the bonnet (9).. Lift off the bonnet (9). 9. Remove the upper spring plate (). 0. Lift of the spring () and remove lower spring plate () and split rings ().. Remove spindle () with guide () and disc ().. Carefully clean seat () and disc (), and if required body internals.. Refit spindle () with guide () and disc ().. Fit the split rings () into spindle groove and retain with the securing ring (9); slip on lower spring plate () to locate on split rings ().. Replace spring ().. Slip on the upper spring plate () onto the spindle ().. Align adjusting screw (), and bonnet (9), over the spindle () and refit.. Fit and tighten the hex. nuts (). 9. Load the spring () to obtain the required set pressure. Clockwise rotation of adjusting screw () increases pressure. Anticlockwise rotation of adjusting screw () reduces pressure. 0. Tighten the lock nut (9) onto the adjusting screw ().. Refit and secure spindle cap () by pin () and securing (9).. Screw-on the lever cover ().. Pull the lever () towards the middle so that the lifting fork () is pushed under the spindle cap ().. Test spindle will lift correctly by pulling lever. These instructions are applicable for Relief Valves, CAUTION During all work the spindle has to be secured against twisting in order to prevent damage to the sealing surfaces. 9 FAINGER LESER April 00 /