Pressure containment valves
The task of the pressure containment valves is to ensure that the pressure after the valve remains at the predetermined level. If the pressure tends to drop, the valve opens and adds some extra pressure into the system. Otherwise, the valve stays closed.
Pressure containment valves are suitable for steam, liquids and gases.
Two operating principles
For pressure containment, you can choose whether you want to use valves where the pressure regulation occurs entirely inside the valve as a function between the inflow pressure of the line and the adjustable closing spring of the valve, like in case of NIEZGODKA and ARI pressure containment valves.
Another approach, allowing slightly more stable pressure containment, is used in models where the pressure is regulated by a membrane actuator. An impulse pipe connects the actuator to the upstream side of the valve. On the other side of the membrane there is a spring; the pressure setting can be changed by adjustment of its spring force. GESTRA pressure containment valves are based on this technology.