Main Relief Valves

U.L. Listed /U.L.C. Listed

Factory Mutual Approved

The Cla-Val Model 2050B-4KG1 Globe/ 2050B-4KG1 Fire Pump Angle Pressure Relief Valve is designed to automatically relieve excess pressure in fire protection pumping systems. Pilot controlled, it maintains constant system pressure at the pump discharge within very close limits as demands change. 

eFirePump.com stocks the Cla-Val Model 50B-4KG1 flanged angle pattern UL/FM fire pump relief valves and ships to the continental US for $450.00 typically within 1-2 business days to any commercial address.  If the address being delivered to is residential, we reserve the right to collect the additional cost for the residential delivery.

Optional globe pattern and grooved valves available. Contact efirepump.com for price and availability. 

Pressure Ratings Class 150# Flanged

250 PSI Maximum Inlet Pressure

20-200 PSI Adjustable Set Relief Pressure Range

Pressure Rating Class 300# Flanged

300 PSI Maximum Inlet Pressure 

100-300 PSI Adjustable Set Relief Pressure Range

The Kunkle Model 218/228 is a bronze trim UL Listed and FM approved relief valve designed for fire pump installations. It is easily adjustable with the provided hand-wheel. Maximum set pressure of 175 PSI with the 125# inlet flange and a maximum set pressure of 200 PSI with a 250# inlet flanges.

eFirePump.com stocks the Kunkle 218 fire pump relief valve and typically ships to the continental US for FREE typically within 1-2 business days.

We furnish the Kunkle Model 228 which is the same valve as the 218; but includes both the pressure cap and handwheel. Both are equivalent to the non-listed Kunkle Model 91.

Pressure Ratings Class 125# Flanged

200 PSI Maximum Inlet Pressure

60-175 PSI Adjustable Set Relief Pressure Range

Pressure Rating Class 250# Flanged

200 PSI Maximum Inlet Pressure 

60-200 PSI Adjustable Set Relief Pressure Range

The Cla-Val fire protection rubber repair kit includes a replacement diaphragm, disc, and spacer washers fir the Cla-Val 2050B-4KG1 angle and the 50B-4KG1 globe pattern UL/FM relief valves. A pilot valve repair kit is also available.

This Kit Includes

• (1) Diaphragm
• (1) Disc 
• (2) Spacer Washers

Pilot Kit can be included.

Pilot Kit Includes

• (1) Stem Assembly
• (1) Diaphragm 
• (2) O-Rings

The Cla-Val fire protection pilot kit includes a replacement diaphragm, stem assembly, and O-Rings for the Cla-Val 2050B-4KG1 angle and the 50B-4KG1 globe pattern UL/FM relief valves. A fire protection rubber repair kit is also available.

Pilot Kit Includes

• (1) Stem Assembly
• (1) Diaphragm 
• (2) O-Rings