FIELD: valves industry.
SUBSTANCE: invention relates to pressure drop valves. Valve having a valve portion in a housing comprising a flow passage from a fluid inlet to a flow outlet, valve seat disposed inside the said flow passage, and a valve cone configured to change the position. Said position defines the valve opening, which is the opening between the valve seat and the valve cone. Valve further comprises a membrane configured to deflect under the effect of a pressure drop across the membrane, first means and a second means for transferring pressures to the membrane opposite sides. Auxiliary valve is connected to the valve, connected with possibility of opening and closing with one of said first means and second means. When the auxiliary valve is closed, the pressure is transferred only to one of the two of the membrane opposite sides.
EFFECT: differential pressure valve is proposed.
10 cl, 3 dwg
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