Pressure relief valve
OPRV series
Hauck
The valves in this series are suitable for most combustion applications. Maximum fluid temperature is 400°F (204°C) for all valves. The HVB and model are suitable for light oil, No. 4, 5 & 6 fuel oil, Bunker C and waste oils. The valves in the HVB series use a hand wheel adjustment with locking nut. All valves feature NPT connections.








