Relief Valves

Features

Set pressure: RV series: 7 color-coded springs available for a wide range of set pressure,

-50 to 6000 psig @ 70°F (3.4 to 414 bar @ 20°C)

-RL series: 10 to 225 psig @ 70°F (0.68 to 15.5 bar @ 20°C)

-RM series: 3 color-coded springs available for a wide range of set pressure,

-50 to 1500 psig @ 70°F (3.4 to 103 bar @ 20°C)

Maximum outlet pressure:

-RV series: 1500 psig (103 bar)

-RL series: 225 psig (15.5 bar)

-RM series: 1500 psig (103 bar)

Orifice size:

-RV series: 0.14 (3.6 mm)

-RL series: 0.19 (4.8 mm) and 0.25 (6.4 mm)

-RM series: 0.25 (6.4 mm)

Back pressure

-Back pressure is the pressure of the outlet of valves. It increases the set pressure of proportional relief valves.

-RV and RM series: Balance stem design to eliminate the effect of system back pressure

-RL series: Pre-set pressure = Desired pressure – 0.8 × Back pressure

Working temperature: -10°F to 300°F (-23°C to 148°C)

Variety of end connections

Liquid or gas service

Adjustable bonnet cap and adjustable set pressure

Lead seal through lock wire holes to lock proportional relief valve so as to secure a set pressure effectively

Variety of seal materials

Label identifies the set pressure range