Drager over pressurization valve

[andibk]

List,
Has anybody out there had any problems with the over pressurization valve on the Drager Dolphin.
For the past few years it has always worked correctly even to the adjustment. Two dives ago the valve was constantly letting out gas with it adjusted on the hardest setting. I disassembled the unit and put it together then it would not let the gas out unless I totally squezed the gas out with my back. I took it apart and compared it to another valve that has been working fine and everything looked fine. Does anybody got any suggestions.

andibk

 

[scubatech]

It's probaly not over pressure valve. It may be your flow rate. Get out your flow meter and check it out. a comon problem with the drager's is that the seat wears out in the bypass valve before the recomended service intervial In other words, the extra gas could be coming from the bypass valve not the orifice.