STOP AND CONTROL VALVE Russian patent published in 2009 - IPC F16K1/12 F16K3/22 F16K39/02 

FIELD: transportation.

SUBSTANCE: invention is related to pipeline valves, to isolating devices with stop element that executes sliding motion along seat surface, having shape of revolution bodies surface, and is intended for installation on technological lines of gas field to isolate and control of transported medium flow. Valve comprises body with inlet and outlet channels. Body contains two locks that are displaced by drive, for limited slewing electric drive. In case of stop and control lock opening, sealing element of seat is in unloaded condition, i.e. pressure drop on it is absent, and in case of medium flow control common pressure drop is equally distributed between both steps of control.

EFFECT: increased reliability and durability of valve operation.

2 dwg