A flat gate valve is a sliding valve that closes a parallel gate. The closure may be a single shutter or a double shutter with a distraction mechanism in between.
The pressing force of the gate to the valve seat is controlled by the medium pressure acting on the floating gate or the floating valve seat. If it is a double gate plate gate valve, then the two gates to see the distraction agencies can add this pressure.
The advantages of flat gate valve :
The flow resistance is small, not shrinking its flow resistance and short tube flow resistance similar. Plate gate with guide hole installed in the pipeline can also be directly pig pigging. As the gate is sliding on the two valve seat surfaces, the gate valve fluid can be used for media with suspended particles. The sealing surface of the gate valve is actually automatically positioned. Seat sealing surface is not subject to thermal deformation damage. And even if the valve is closed in a cold state, the thermal expansion of the valve stem will not overload the sealing surface. At the same time, when the valve is closed, the gate valve without a guide hole also does not require a high degree of accuracy in the closing position of the gate plate. Therefore, the electric flat-plate valve can control the opening and closing position by the stroke.
Flat gate valve classification:
Flat gate valve by driving can be divided into manual flat gate valve, pneumatic flat gate valve and electric flat gate valve. According to the purpose and use occasions can be divided into a diversion orifice plate gate valve, no diversion orifice plate gate valve, oil field plate gate valve, pipeline flat gate valve and gas flat gate valve.
