Pressure relief valve or safety valves for compressed air & air tank

WHAT ARE THEY, AND HOW DO THEY WORK?

Any compressed air pressure vessel must be protected from an over-pressure situation - the maximum allowable working pressure (MAWP) approved by DOSH must not be exceeded. A pressure relief valve is used to limit the pressure build-up in a system, by automatically relieved by a spring-loaded valve, actuated by the static pressure upstream of the device. The valve opens in proportion to the increase in pressure over the opening pressure.


Brass Safety Valves - 145 psi, 200 psi

Safety valve 1/4 inch;

Connection: 1/4"
Set pressure: 200 psi

Safety valve 1/4 inch; 200psi

Connection: 1/4"
Set pressure: 200 psi

Safety valve, brass, conn. 3/8"

Connection: 3/8"
Set pressure: 145 psi

Safety valve 3/8" 145 psi

Connection: 3/8"
Set pressure: 145 psi



Safety valve 3/8" 145 psi

Connection: 1/2"
Set pressure: 145 psi



Inter-Stage Safety Valves - 60, 80, 160, 200, 260 (PSI)

Features - lock nut - Brass material - Heavy Duty

Heavy duty inter-stage safety valve with lock nut

Connection: 1/4"
Set pressure: 60 psi

Inter-stage safety valve with lock nut 1/4" 80 psi

Connection: 1/4"
Set pressure: 80 psi

Inter-stage safety valve with lock nut

Connection: 1/4"
Set pressure: 160 psi

Inter-stage safety valve with lock nut

Connection: 1/4"
Set pressure: 200 psi



Inter-stage safety valve with lock nut

Connection: 1/4"
Set pressure: 260 psi



Heavy Duty Brass Safety Valves - 65, 160, 200, 260, 600 (PSI)

Heavy duty brass safety valve

Connection: 1/2"
Set pressure: 65 psi

Heavy duty brass safety valve

Connection: 1/2"
Set pressure: 160 psi

Heavy duty brass safety valve 1/2" 200 psi

Connection: 1/2"
Set pressure: 200 psi

Heavy duty brass safety valve 1/2" 260 psi

Connection: 1/2"
Set pressure: 260 psi



Heavy duty brass safety valve 1/2" 600 psi

Connection: 1/2"
Set pressure: 600 psi



Brass Safety Valves With Lock Cap - 145 PSI

Brass safety valve with lock cap 3/4" 145 psi

Connection: 3/4"
Set pressure: 145 psi



Bronze / Brass Safety Valves With Lever for Air Receiver - 150 PSI

It is used to vent excess pressure which could rupture a pressure vessel. A pressure relief device is the last line of defense for safety If all other safety controls fail, the pressure relief device must be capable of venting excess pressure.


Bronze safety valve with lever 1/2" 150 psi

Connection: 1/2"
Set pressure: 150 psi

Bronze safety valve with lever 3/4" 150 psi

Connection: 3/4"
Set pressure: 150 psi

Bronze safety valve with lever 1/2" 150 psi

Connection: 1"
Set pressure: 150 psi