DIFFERENSTRYKVENTIL

A valve comprising a valve part comprising; - a valve housing with a flow communication from a fluid inlet to a flow outlet and a valve seat positioned within said flow communication, a valve cone (3) adapted to change position to change the valve opening defined as the opening between the valve seat and valve cone, a membrane adapted to deflect under the influence of a differential pressure across said membrane and means to communicate pressures to the opposing sides of the membrane, -a regulation part comprising a biasing member and setting housing, said regulation part attached to said valve part. - a spindle having a part within the regulation part and a part within the valve part and connected to said valve cone, where the spindle may be translocated to and maintained at an flushing position the valve cone forms no or at least limited obstruction to the fluid communication from fluid inlet to fluid outlet.