Safety Relief Valve RL37-G

The RL37-G is a 3/8” ported relief valve. Designed for emergency relief applications, it may be used to protect systems up to 414 bar (6,000 psi). The valve is a proportional metering style relief valve with soft seats enabling its use with gasses, and is approved as a safety accessory to category IV of the Pressure Equipment Directive.

Available in Stock, Contact our sales at [email protected]

Approved to category IV of the Pressure Equipment

Directive (2014/68/EU)

Available preset via internal adjustment or with an

external handwheel adjustment option

Wire locking and tagging available on request

Minimal leakage at 90% of set pressure

Reseat within 20% of set pressure

Repeatabily within ±5% of set pressure

Subsea variants available, contact us for advice

Suitable for use with air, nitrogen and sweet natural gas.

Suitable for many other media, contact us for advice

Available in many other materials.




Max Working Pressure

414 bar




Fluid: Gas




Port Size – 3/8’’



0.9 KG (2.0 lb)



Externally Exposed Parts:

316 stainless steel. The handwheel

version contains other 300 series stainless steels.



Internally Wetted Parts:

316, 302 and 431 stainless steel and