Subsea Relief Valves

The Oliver Valvetek Subsea Relief Valves have a cracking pressure of 10 psi to 20 psi and a reverse sealing pressure of up to 5,000psi. Our relief valves are widely regarded as an industry standard when it comes to preventing leakage from hydraulically actuated gate valves.

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Oliver Valvetek's Subsea Relief Valves are widely used on hydraulically actuated gate valves to prevent leakage from gland seals entering actuators.

The fail close sprung poppet arrangements have been design and flow tested to prevent pressure build ups by relieving to the sea, and closing to stop the seawater from entering.

The small bore subsea relief valves can be supplied with a range of opening pressures and are suitable for water depths to 3050m (10,000ft). We are also able to work with customers to extend the standard 20 PSI cracking pressure where necessary.

Key Features

  •     Pressure relief valve, typical material of body construction being BS 970 316S11 stainless steel spindle material of 316 stainless steel. Other material options are available on request.
  •     A range of inlet connections based on the customers specific requirements.
  •     Certification for materials of wetted pressure retaining parts (i.e. body and spindle) are traceable to original material certification to BS EN 10204 3.1 certification and optional EN 10204 with intent of 3.2 type certification option is also readily available (EN 10204 3.2 true mill witnessed shall be assessed for availability upon request).

Technical Specifications

  •     The valve has been designed and tested to have a cracking pressure of 10psi to 20psi and a reverse sealing pressure of 5,000psi.
  •     The operating temperature range is - 40 C to 121 C.
Subsea Relief Valve Specifications:
Body Construction BS 970 316S11 stainless steel
Inlet Connection To customers specific requirement.
Water Depths 3050m (10,000ft).
Reverse Sealing Pressure 5,000 PSI
Cracking Pressure 10 PSI to 20 PSI

Below is the data sheet for this product:

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