Safety Relief Valve RL75

The RL75 is a 3/4” ported relief valve. Designed for emergency relief applications, it may be used to protect systems up to 1,034 bar (15,000 psi). The valve is a proportional metering style relief valve, and is approved as a safety accessory to category IV of the Pressure Equipment Directive, enabling its use in the most demanding applications.

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 mineral oils and water glycols, with

options for water and sea water duty

Suitable for many other media, contact us for advice

Various spring ranges available





Max Working Pressure

1,034 bar




Fluid: Liquid




Port Size – 3/4’’



2.0 KG (4.4 lb)



Externally Exposed Parts:

316 stainless steel on all pressure retaining

components, 300 series stainless steel is used for the external adjuster.

The non-wetted and enclosed internal adjuster is chrome steel

and brass.



Internally Wetted Parts:

316, 302 and 431 stainless steel. The seat and

ball are 440C stainless steel and silicon nitride respectively.