In-line pressure venting valves / vacuum venting valves

They are used as protective equipment with pressure - and vacuum installations.
These devices can be directly actuated by their pallet own weight or by means of a spring.
The role of these valves consists in protecting industrial production installations (tanks, technological equipment, pipes, etc.). In-line venting valves can also be used as end-of-line venting valves. In end-of-line applications, the location area shall be protected from atmospheric factors, powder and dust, and from animal interference.
The PROTEGO product range offers 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 loss with inert gas upper blanket tanks.
▪ Diminished cost by using smaller dimension valves.
▪ Significantly higher flow rates at smaller valve dimensions as compared to conventional valves.
▪ Superior tightness, complying with international standards requirements.
▪ The pallet guiding system is adequately weatherproof; so valve blocking because of frost is thus prevented.
▪ Mounting in areas with explosion risk is possible.
▪ Maintenance ease.


In order to secure safe long-term operation, the internal structure parts of the valve are made of high-grade stainless steel.
 
Typical applications for the in-line venting valves:
- safety valve at blanketing systems;
- pressure reducer for connection at nitrogen blanket systems;
- aeration control of installations or tanks included in a vapour recuperation system.