Over- and-under pressure relief valve 300 mm

A highly developed pressure and vacuum relief valve with excellent flow performance. Typically, the valve is installed in the in-breathing and out-breathing lines of tanks, vessels, and process equipment to protect against unallowable overpressure and underpressure. The valve prevents emission losses almost up to the set pressure and prevents air intake almost up to the set vacuum.

The device will start to open as soon as the set pressure is reached and only requires 10% overpressure to full lift. A low pressure valve which has the same opening characteristic as a high pressure safety relief valve. This “full lift type” technology allows the valve to be set at just 10% below the maximum allowable working pressure or vacuum (MAWP or MAWV) of the tank and still safely vent the required mass flow. The opening characteristic is the same for pressure and vacuum relief.

Due to the highly developed manufacturing technology, the tank pressure is maintained up to set pressure with a tightness that is far superior to the conventional standard. This feature is achieved by valve seats made of high quality stainless steel and with precisely lapped valve pallets (1) or with an air cushion seal (2) in conjunction with high quality FEP diaphragm. The valve pallets are also available with a PTFE seal to prevent the them from sticking when sticky products are used and to enable the use of corrosive substances. After the overpressure is released or the vacuum is balanced, the valve re-seats and provides a tight seal.

For biogas, biomethane, natural gas, CNG, bioCNG.

Housing aluminum or stainless steel
Heating jacket - stainless steel
Valve seat - stainless steel
Sealing - PTFE
Weather hood- stainless steel

Pressure: from +2.0 mbar to +60 mbar
Vacuum: from -2.0 mbar to -60 mbar
Gas flow from 3 000 to 10 000 m3/hour

Technical Details

DN, mm:

300

Flow, m³/h:

3000-10000

Technical Details

DN, mm:

300

Flow, m³/h:

3000-10000

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