The disc of the flanged gate valve is installed in the diameter direction of the pipe. In the valve body cylindrical channel, disc shaped disc around the axis of rotation, rotation Angle between 0°-90°, rotation to 90°, the valve is fully open.

Sandwich type thin ball valve, sandwich butterfly valve simple structure, small volume, light weight, only a few parts. Moreover, the valve can be opened and closed quickly by rotating only 90°, which is easy to operate. At the same time, the valve has good fluid control characteristics.

When the ball valve is in the fully open position, the thickness of the valve plate is the resistance of the medium flowing through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The tower valve has two kinds of seal type: elastic seal and metal seal. Resilient sealing valve, sealing ring can be embedded in the body or attached to the periphery of the disc.