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WCB Pressure Safety Valves , Pilot Operated Safety Valve For Air Pipeline
Pilot Operated Safety Valve
Description
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WCB?Pressure?Safety?Valves?,?Pilot?Operated?Safety?Valve?For?Air?Pipeline
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Quick?Detail:?
# # Pressure?Rating:?Inlet?Class?150~2500,?Outlet?Class?150?-?300
# Base?Material:?ASTM?A216?WCB,?ASTM?A351-CF8,?SPECIAL?STEEL
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Performance
# # The?allowable?tolerance?of?the?set?pressure:≤±3%?of?the?set?pressure
# Overpressure:?≤±10%?of?the?set?pressure
# Blowdown:?≤±10%?of?the?set?pressure
# Tightness:?The?valves?have?good?seat?tightness,?conforms?to?API?Std?527
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Features
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# # The?soft?design?provides?good?seat?tightness?before?and?after?each?relief?cycle.
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# The?system?can?be?operated?nearer?set?pressure?without?valve?leakage.
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# No?more?overpressure?required?for?full?lift?of?main?valve.
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# Proper?valve?operation?and?lift?are?unaffected?by?back?pressure.
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# Adjustable?blowdown.
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# Non-flowing?pilot?reduces?product?loss?and?environmental?pollution.
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# Quick?simple?verification?of?set?pressure?while?valve?remains?in?service.
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Principles?of?operation
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In?the?normal?closed?position,?system?pressure?is?transmitted?through?the?pilot?valve?and?into?the?dome?
of?main?valve.?The?pressure?above?the?main?valve?disc?generates?a?net?downward?force,?hold?the?main?
valve?closed.
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When?system?pressure?reaches?the?set?pressure,?the?pilot?spindle?lifts?and?reseat?piston?closed?
simultaneously,?venting?the?dome?pressre?through?the?pilot?valve?to?atmosphere.??Because?of?system?
pressure?remains?above?reseat?pressure,?the?reseat?piston?is?held?tightly?closed,?blocking?flow?to?the?
pilot?valve?(the?non-flowing?pilot?valve?feature),?at?this?time?the?dome?pressure?of?main?valve?is?
depressed?quickly,?allowing?the?main?valve?to?open?fully.
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When?the?desired?system?pressure?is?achieved,?the?pilot?spring?force?overcomes?force?on?the?reseat?
piston,?the?reseat?piston?snaps?open?and?the?pilot?spindle?snaps?closed?simultaneously.?Finally,?
system?fliud?reenter?the?dome?and?closes?the?main?valve.
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Shandong Luda Packing Co.,Ltd
stretch film .paper corner ,plywood box ,adhesive tape
Address: Room No.1302,Huangtai E-commerce industrial park,Lishan North Road,TianQiao District,Jinan City,Shandong Province,China,
Jinan, Shandong
China, 250000
Tel: 15376875220
Fax: 53181258989
