VALVE ASSEMBLY Russian patent published in 2017 - IPC F16K31/126 

FIELD: machine engineering.

SUBSTANCE: valve assembly includes a valve body having a first pressure chamber and a second pressure chamber. At that, the pressure in the first pressure chamber is lower than in the second pressure chamber, and the pressure from the second pressure chamber is released into the first pressure chamber in response to the pressure change in the first pressure chamber. A blocking device is located between the first pressure chamber and the second pressure chamber. A valve stem is located in the valve body. In this case, an end of the valve stem interacts with the blocking device configured movable therewithin. A membrane is connected to the valve stem and located next to or above the first pressure chamber. At that, when the pressure in the first pressure chamber changes, the membrane causes the valve stem to move in the result of determining pressure change in the first pressure chamber. In this case, the first pressure chamber contains an inner chamber located on the valve stem. The valve stem has a connection hole at one end that contacts the blocking device. At that, the connection hole provides communication of the valve stem inner chamber with the to the second pressure chamber.

EFFECT: reduced elements mounting and replacement complexity.

15 cl, 14 dwg