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)

Wuhan Spico Machinery & Electronics Co., Ltd.（Hereinafter referred to as SPICO） is the Wuhan

office of  CNP NM Fire-fighting System Co.,Ltd (Hereinafter referred to as NM Fire). SPICO mainly resp-

onsible for product promotion，export declaration and foreign exchange collection of overseas orders.NM

Fire  is the subsidiary of Nanfang Zhongjin Environment Co.,Ltd, which islocated in Hunan Changsha

Economic and Technological Development Zone, mainly produceand sell Diesel engine &Motor fire pump

groups ,controllers and fire pumps which are in accordance with domestic & international standards and have

gotten related certifications .

With the help of multi-national engineers with more than 20 years of professional experience, the NMFIRE

technical team fully understands the technical requirements of fire fighting systems. They have overcome

difficulties, conquered technical aspects, created China's first in this industry and opened up a new market

for China's fire fighting research andtechnology.

The company’s mission is to protect the community fire safety, in line with the spirits of “integrity,

win-win”,glad to provide high cost-effective products and high-quality service for our customers.

Fire fighting is the last protection for life and property. These include strict technical, quality and testing requirements

for fire fighting equipment that are specified in the UL/FM product standard.

Under the premise of fully learning and understanding these standards, our company has invested huge sums of money

and energy in research and development of new products. Many innovative technologies have been developed through

product R&D. The pumps and diesel engines have reached the level of first class in the world. The research and

development of these two critical products has put an end to the long history in the domestic marketplace of taking

non-certified ordinary water pumps and diesel engines and using them in life safety applications. This has also completely

changed the domestic technology level of this industry and has allowed NM FIRE to lead the market

Start by meeting the customer obvious needs, follow by continuously deepening and exploring potential customer demand,

meanwhile, plant the philosophy into our soul.