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Instruction Manual
0017EN-VSFL-IM
January 2010 - Rev. 03
Pilot-Operated relief Valves
Summary
Introduction ........................................................................
P.E.D. Categories and Fluid Group ...................................
Characteristics ...................................................................
Labelling ............................................................................
Overpressure Protection ....................................................
Transport and Handling .....................................................
Atex Requirements ............................................................
Pilots ..................................................................................
Operation ...........................................................................
Dimensions and Weights ...................................................
Installation .........................................................................
Startup ...............................................................................
Pilot Adjustment .................................................................
Shutdown ...........................................................................
Periodical Checks ..............................................................
Relief Valve Maintenance ..................................................
Type PRX/182 Pilot Maintenance ......................................
Spare Parts ........................................................................
Troubleshooting .................................................................
Parts Lists ..........................................................................
Schematic Assemblies .......................................................
INTrODuCTION
Scope of manual
This manual provides instructions for installation, startup,
maintenance and spare parts ordering for the VS-FL Series
pilot operated relief valves and for PRX/182 pilot.
TM
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Figure 1. Relief Valve Type VS-FL with PRX/182 Pilot
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Product Description
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The VS-FL Series relief valves are axial flow type with a
single seat and counterbalanced shutter.
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They are used in reduction, distribution and conveying
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stations using suitably filtered natural gas.
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They can also be used for air, propane, butane, LPG, city
gas, nitrogen, carbon dioxide and hydrogen.
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The following versions are available:
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VS-FL-BP : For low and mid pressure applications
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VS-FL
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Also available version with type SR silencer.
All standard gas pressure devices (relief valves) used
in assemblies will comply to EN 12186 and EN 12279
standards.
Any accessories (e.g. pilots) used on the Emerson Process
Management range of relief valves, must be manufactured
by one of the Emerson Process Management companies
and bear that manual.
If this is not respected, Emerson Process Management will
not be responsible in the case of any inefficiency.
Type VS-FL
Pilot PRX/182
: For mid and high pressure applications
Pilot PRX/182 or PRX-AP/182
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Table of Contents
Related Manuals for Emerson VS-FL Series
Summary of Contents for Emerson VS-FL Series
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Page 1: Table Of Contents
Dimensions and Weights ........... Installation ................. Startup ................Product Description Pilot Adjustment ..............The VS-FL Series relief valves are axial flow type with a single seat and counterbalanced shutter. Shutdown ................They are used in reduction, distribution and conveying Periodical Checks .............. -
Page 2: P.e.d. Categories And Fluid Group
ANSI 300 : 50 bar pressure relief valve closing. ANSI 600 : 100 bar At average ambient temperature. Table 1. P.E.D. Category for VS-FL Series Relief Valves Outlet Set Pressure ranges PrODuCT SIzE CaTEGOry FLuID GrOuP VS-FL-BP PN 16 ANSI 150 DN 25-40-50 : 0.5 ÷... -
Page 3: Overpressure Protection
Type VS-FL Note 1: See “Characteristics” • drainage to safe area via drain lines of foreign materials, if any, by inflow of fuel gas with low velocity in the pipe-work (5m/sec) Note 2: Year of manufacture In any case, • provisions of Directive 1999/92/EC and 89/655/EC shall Note 3: Class 1: -10°/60°C be enforced by gas pressure regulating/measuring station/ Class 2: -20°/60°C... -
Page 4: Pilots
Type VS-FL PILOTS VS-FL relief valves are equipped with the PRX/ series pilots. Table 2. Pilots Type PRX/182 and PRX-AP/182 Characteristics allowable Pressure Set range Body and Covers model PS (bar) Wd (bar) material PRX/182 0.5 - 40 Steel PRX-AP/182 30 - 80 N.B.: 1/4”... -
Page 5: Dimensions And Weights
N.B.: (*) ANSI 300 I = 568 - 1/4” NPT female threaded connections INSTaLLaTION To the atmosphere or in a safe area PRX/182 Plug (0,75 mm) To the atmosphere or in a safe area VS/FL NOTE: rECOmmENDED PIPING IS STaINLESS STEEL WITh 10 mm DIamETEr. Figure 6. VS-FL Series Connection/Installation Schematic... -
Page 6: Startup
Type VS-FL INSTaLLaTION (CONTINuED) In particular, when venting a hazardous gas, the piping or tubing should be located far enough away from any buildings or windows • Ensure that the data found on the valve label are so to not create a further hazard, and the compatible with usage requirements. -
Page 7: Pilot Adjustment
Bring pressure upstream of relief valve up to set point. • Slowly loosen adjusting screw until relief valve opens. VS-FL Series Relief valve and its pressure accessories are This is revealed by the escape of gas through vent. subject to normal wear and must be inspected periodically and replaced as necessary. -
Page 8: Type Prx/182 Pilot Maintenance
Type VS-FL relief Valve General maintenance Reassembly Lubricate all seals with MOLYKOTE 55 M, being very careful a. Disconnect all fittings, remove regulator from the line and not to damage them when reassembling. Reassemble the place it in upward vertical position. parts by reversing the above steps. -
Page 9: Spare Parts
Replace any worn parts. any damage. TrOuBLEShOOTING Table 4. General Troubleshooting for VS-FL Series Relief Valves SymPTOmS CauSE aCTIONS Lack of incoming gas... -
Page 10: Parts Lists
Type VS-FL ParTS LISTS Description 402* O-ring VS-FL relief Valve Support (See Figures 7 to 11) 404* O-ring Spring collet Description Indicator Inlet flange Bracket Anti-friction ring Support O-ring Proximity switch O-ring Fitting Screw Spring Fitting Inlet plate Type PrX/182 Pilot Screw (See Figure 12) Diaphragm... -
Page 11: Schematic Assemblies
Type VS-FL SChEmaTIC aSSEmBLIES LM/1403 Figure 7. VS-FL Relief Valve DN 25 to DN 150... - Page 12 Type VS-FL SILENCED VS-FL PAD HOLDER PAD HOLDER DN 25 TO DN 50 DN 65 TO DN 150 NOT SILENCED VS-FL PAD HOLDER PAD HOLDER DN 25 TO DN 50 DN 65 TO DN 150 LM/1403 Figure 8. Pad Holder for VS-FL Relief Valve DN 25 to DN 150...
- Page 13 Type VS-FL 10 11 12 13 14 15 Figure 9. VS-FL Relief Valve DN 200...
- Page 14 Type VS-FL VS-FL-BP/150 DETAIL VS-FL/150 ANSI 300-600 DETAIL VS-FL/150 ANSI 300-600 DETAIL VS-FL-BP/150 DETAIL Figure 10. VS-FL Relief Valve DN 150 Various Versions VS-FL/ AND VS-FL-BP/ WITH PROXIMITY SWITCH VERSION LM/1403 LM/1403 Figure 11. VS-FL Relief Valve DN 25 to DN 150 with Proximity...
- Page 15 Type VS-FL aP VErSION Table 5. Type PRX/182 and PRX-AP/182 Connections To the controlled To Chamber 2 of the To the controlled pressure relief valve pressure PrX/182 SECTION a-a LM/1390 Figure 12. Type PRX/182 and PRX-AP/182 Pilots...
- Page 16 For further information visit www.emersonprocess.com/regulators The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Tartarini is a mark of O.M.T. Officina Meccanica Tartarini s.r.l., a business of Emerson Process Management.