Over-Pressure Relief Valve (User Adjustable)
- Install into 3/8" male LP port and provides protection from first stage failure
- Factory set to 180 PSI rating but user adjustable with a 3mm hex wrench
- Adjust to a minimum setting of 90 PSI to maximum setting of 240 PSI
The First Stage Overpressure Relief Valve screws into any first stage 3/8-inch male low pressure port. They are factory set to 180 PSI rating but that can and will change over time and with travel and shipping. For this reason the OPV is User adjustable, with a 3mm Allen (HEX Head)wrench, and has a minimum setting of about 90 psi and a max setting of 240 psi.
To provide better drysuit insulation than their back gas breathing mixture would, divers sometimes carry a small pony containing argon or air with just a first stage regulator and a low pressure drysuit inflator hose. However, on dedicated drysuit inflation systems there is no regulator second stage to provide relief should the high pressure seat fail. Without a way to relieve the pressure, the drysuit could begin inflating rapidly or the low pressure hose could rupture. The over-pressure relief valve provides the same fail-safe function as a normal regulator second stage.
This is also a common item that is added to older Poseidon regulators that do not have the built in OPV at the base of the first stage..thus allowing them to use current standard hoses(not a specific Poseidon hose with an OPV built into the hose itself.
Most Helpful Customer Reviews
Over pressure valve (OPV)
on 9 May, 2017Delivery was on time and the OPV was what I wanted and Dive gear Express is doing a good job. Trusted and reliable. ThanksComment Thank you for your feedback! You already voted Sorry, we failed to record your vote. Please try again
Great product, great service...as always.
on 10 February, 2017With DGX you know exactly what you are getting, plus great service and free shipping.Comment Thank you for your feedback! You already voted Sorry, we failed to record your vote. Please try again