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Sonar LP 3/8" Male UNF Safety Over Pressure Valve (OPV)

WMD-UA-6 | AHA-14


The Sonar Low Pressure (LP) 3/8 inch Male UNF standard safety Over Pressure Relief Valve (OPV or OPRV) is factory set for 175 to 185 psi for pressure release.

Compact OPV releases pressure in the event of an over pressurisation of the first stage regulator.

The Sonar Over Pressure Valve is for any 1st stage that doesn't have a 2nd stage to relieve excessive pressure if the 1st stage fails. Primarily used for argon suit inflation cylinders that don't have a 2nd stage, you need an OPV to prevent excess pressure building up in the 1st stage and hose leading to your suit that could cause damage or uncontrolled inflation.

Technical Divers need redundant safety back-ups on most all their equipment to assure the safest dive techniques allowed. A first stage regulator should work well when it is maintained properly, yet if it does malfunction added safety features can make the difference between a controlled emergency and a diving accident. Incorporating a safety relief valve on your 1st stage regulator makes an over pressurisation of a 2nd stage regulator hose nearly impossible.

This compact safety valve is designed to release pressure in the event of an over pressurisation of the first stage regulator. Easy to install into a standard 3/8 inch UNF low pressure regulator port, the OPV is factory set at 175 to 185 psi.

The 3/8"-24 UNF Male end of this OPV screws into a standard LP port on a first stage regulator.

Sonar Safety Over Pressure Valve (OPV) Features

  • Factory set at 175 to 185 psi for pressure release
  • Compact relief valve releases pressure in the event of an over pressurisation of the first stage
  • Fits standard 3/8-24 UNF low pressure regulator port
  • Durable marine grade chromed brass construction
  • Stainless steel internal spring
  • Factory cleaned - Nitrox ready

(03/22 HS)

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