Wuhan Spico Machinery & Electronics Co., Ltd.
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Circulation (Casing) Relief Valve UL Listed and FM Approved
The *Circulation Relief Valve (CRV)* is essential for electric motor-driven fire pumps because
it prevents overpressure, protects equipment, ensures system efficiency, and complies with
NFPA 20 standards. It relieves excess pressure during low-demand periods, preventing damage
to system components and reducing energy consumption. Overall, the CRV maintains the safety,
efficiency, and longevity of fire pump systems
UL Listed / ULC Listed Pressure Relief Valve
Factory Mutual Approved
Fast Opening to Maintain Steady Line Pressure
Accommodates Wide Range of Flow Rates
Closes Gradually for surge-Free Operation
Adjustable Pressure Settings, Not Affected by
Pressure at Valve Discharge
Specifications:
Globe: 2"-10" flanged Angle: 2" -10" flanged
150 and 300 ANSI B16.42
Class 150-250 psi Max. Class 300-300 psi Max
Water, to 180°F Max.
Main valve body & cover
Ductile Iron ASTM A536 Grade 65-45-12
Standard Main Valve Trim: Bronze Seat, Teflon Coated Stainless Steel Stem, Dura-Kleen Stem
Standard Pilot Control System: Cast Bronze with Stainless Steel trim
Aailable in the following relief
Pressure ranges:
20~200 psi (150 Class) 100~300psi (300 Class)
Protective epoxy resin coating of wetted surfaces of main valve cast iron components
(UL Listed HNFX EX2855)