Gordon Brothers
Relief
Valves

Trusted & Reliable

Gordon relief valves have been the most trusted design for pressure relief valves used in Australian industrial refrigeration and petrochemical applications for over forty years

Gordon Brothers manufactures a range of ammonia relief valves (formerly known as Valco by Elster Metering) in both single and dual manifold style.

Gordon Brothers can recalibrate your relief valves, all recalibrations and settings are carried out on our test rig using NATA calibrated instruments. A tag and test certificate is provided as part of our recalibration service.

We can recalibrate many brands of ammonia relief valves, including Valco, Hansen, Mycom, Danfoss, Parker, and Henry.

All ammonia relief (safety) valves need to be visually inspected annually and recalibrated every 5 years. This is required under AS/NZS 3788:2001

Flanged Safety Relief Valves

These valves are suited for ammonia and fluorinated refrigerants. 

Nominal Size Range
Inlet x Outlet (mm)

32 x 40

40 x 40

50 x 50


Duel Stop Valve with Flanged Relief Valves

Gordon Brothers Dual Stop Valve complete with Safety Relief Valves enable the operator to service either of the Safety Relief Valves without disruption to the equipment in service or any drop in plant performance.

Nominal Size Range
Inlet x Outlet (mm)

32 x 32

40 x 40

Safety Relief Valves

Gordon Brothers Safety Relief Valve Type 22405 is a rugged, dependable safety relief valve suitable for low, medium and high pressure services in Refineries, Chemical plants, Refrigeration systems and other process plant applications.

The range includes both male and female end connections, with standard body material in forged steel, and complete stainless steel internals with bursting discs (optional).

Maximum design pressure 2760 Kpa
Maximum design temp  250° c

All safety relief valves are factory set and lead sealed to suit your particular conditions, with the option of colour coded springs if resetting is required.


Duel Stop Relief Valves

Gordon Brothers Dual Stop Manifold Valve c/w Safety Relief Valves enable the operator to service either of the Safety Relief Valves without disruption to the equipment in service or any loss in plant performance.

We recommend that only ONE Safety Relief Valve is in service at any given time, this being achieved by the use of a diverting spindle. 

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