Basic situation of blind valve

Blind valve is a type of gate valve that cuts off gas medium manually, electrically, or pneumatically or hydraulically. It is generally divided into electric blind valve, hydraulic blind valve, pneumatic blind valve, closed plug valve, and electric open blind valve.

The blind valve has three driving devices, including two manual clamping or loosening devices. One is an electric device that opens or closes the gate. When opening or closing the gate, the two manual devices are first released, and then the electric device is activated to achieve the purpose of opening or closing the gate (special attention: the two manual devices are not released, and the electric device cannot be opened). After the gate is opened or closed, the two manual devices are clamped again, Only pipelines can carry out the work.

The blind valve is composed of left and right valve bodies, telescopic mechanisms, fan-shaped valve plates, electric push rods I that drive the valve plates, and clamping and loosening electric push rods II. The electric push rod II acts, the sealing pair disengages, and then the electric push rod I acts, causing the fan-shaped valve plate to move from open to closed. After it is fully closed, the electric push rod II acts in the opposite direction, clamping the sealing pair, and closing the valve. Opening the valve will cause the opposite.