DIFFERENTIAL PRESSURE CONTROL VALVE WITH BACK-WASH Russian patent published in 2018 - IPC F24D19/10 G05D16/06 F16K31/145 

FIELD: instrument engineering.

SUBSTANCE: this invention relates to a valve. Valve having a valve part comprising: a valve body with flow communication from an inlet for a fluid to a flow outlet and a valve seat disposed within said flow communication, a valve cone configured to change the position for changing the valve opening, defined as the opening between the valve seat and the valve cone, a diaphragm configured to deflect under the effect of a pressure drop across said diaphragm, and device which imparts pressure to opposite sides of the diaphragm; adjusting part comprising a biasing member, a setting device and a master body, said adjusting portion being attached to said valve part; spindle having a part located inside the adjusting part and a part, located inside the valve part and connected to said valve cone; valve part and the adjusting part being insulated from each other; setpoint adjuster is located partially inside the body of the setting device, wherein the master case and the adjuster are interconnected the way the adjuster can be moved inside the body of the setting device, thereby moving the spindle inside the valve cone, and in that both the body of the setpoint and the dial are hollow bodies.

EFFECT: thus, a part of the valve can be made of cheaper materials, which may not be resistant to the existing fluids in the system.

9 cl, 5 dwg