Pressure venting valves / - vacuum venting valves with end-of-line flame arresters

They are used as protective equipment with pressure - and vacuum installations. In the same time, they are explosion-proof (anti deflagrant) under atmospheric pressure conditions.


The PROTEGO product range offers flame arrester equipped pressure venting valves, - vacuum venting valves and also a combination model of venting valve fit for both pressure and vacuum. The basic design concept regarding the pallet of the valve is to allow for complete valve opening until the increasing pressure reaches a 10% limit under the admitted overpressure value.
At usual valves, the overpressure value lies between 40 % and 100 % of set value. These valves open at low overpressure values and close behindhand, which results in significant loss of working fluid.
Instead, the "10% technique" allows for setting the pressure at only 10% under the maximum admitted pressure value, which results in reducing the loss by more than 30 %.

The major advantages of this technology are as follows.
▪ Increased efficiency regarding loss reduction of working fluid.
▪ Diminished cost by using smaller dimension valves.
▪ Significantly higher flow rates at smaller valve dimensions as compared to conventional valves.
▪ Reduced loss with low-pressure valves.
▪ Protection against propagation flame, no matter the stored working fluid.
▪ Under normal conditions, the flame arrester is not in contact with vapour layer, thus reducing maintenance dedicated time.
▪ Protection against enduring burning when alcohol substances are involved.
▪ Protection against enduring burning when alcohol substances are involved.



In order to secure safe long-term operation, the internal structure parts are made of high-grade stainless steel.