Pressure Relief Valve

New Pressure Relief Valve Technology for Protection of People and Equipment

04/26/2012 | Editor: Marcel Dröttboom

The Hoerbiger EVN 2.0 pressure relief valve featuring opening detection according to EN 16009.
The Hoerbiger EVN 2.0 pressure relief valve featuring opening detection according to EN 16009. (Picture: Hoerbiger)

The Hoerbiger EVN 2.0 pressure relief valve combines the latest standard according to EN 16009 with the benefits of vacuum-proof, almost entirely maintenance-free construction, and the opening detection function in the EX-protected version according to EN 16009 comes as a standard.

The EVN 2.0 was developed based on the design of the Hoerbiger explosion relief valves, which have been tried and tested for decades. According to the manufacturer, It offers maximum reliability in flameless explosion venting and combines the latest standard according to EN 16009 with the proven benefits of vacuum-proof, almost entirely maintenance-free construction, flexible system planning, and installation without vent ducts to the outside. The opening detection function in the EX-protected version according to EN 16009 comes as a standard with the EVN 2.0 series.

The EVN 2.0 valve is available in different materials, ranging from standard carbon steel to stainless steel variants for the food industry. This material selection, which is tailored to the customers’ requirements, combined with a variety of O-ring materials allows the relief valve to be used in a wide range of applications.

The EV valve is the cost-effective alternative for explosion venting outside. Designed as a recloseable valve, the EV valve additionally offers decreased flame propagation over bursting disks and rupture panels. The robust design, combined with the ability to reuse the valve, offers a key advantage over conventional relief devices. The EV valve is certified and is safety tested according to EN 14797.

In the event of an oil mist, dust or gas explosion, the Hoerbiger relief valve opens quickly and vents the developing excess pressure to a safe level without darting flames. After the explosion, the valve seals tightly again, preventing secondary explosions. The system can continue to operate without interruption.

The compact Hoerbiger valves are tested in accordance with the ATEX Directive. Because of the low-mass valve plates, they respond within fractions of a second in the event of an explosion.

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