Over-/under pressure safety valves

Over-/Under-Pressure Relief Valve is a safety device designed to protect biogas reactors, tanks and gas holders against excessive pressure and vacuum. Reliable sealing is achieved using a liquid seal, typically a water-glycol mixture, with density determined by the mixing ratio. The valve provides safe and stable operation of biogas installations and features a robust, low-maintenance design. Available sizes: DN150, DN200 and DN300.