Wedge gate-type valve can be divided
Valve types, according to the sealing surface configuration can be divided into wedge gate-type valve and parallel gate valve,
wedge gate-type valve can be divided into: single-gate type, gate-type
double plate and elastic; parallel gate-type valve can be divided into
single-gate type and double plate. Position by the valve stem threads
are divided into clear shot valve and the dark bar gate two.
Valve closed, the sealing surface can only rely on media pressure to
seal, which only rely on media pressure to ram pressure to the other
side of the sealing surface of the seat to ensure the sealing surface
of the seal, which is self-sealing. Most of the valve is sealed by
force, that the valve is closed, to rely on external pressure to force
the gate to the seat in order to ensure the sealing surface of the
seal.
Gate valve with the valve stem with a straight line, called (also
called clear shot valve.) Often movements are trapezoidal threaded rod,
nuts through the valve and the valve on the top of the guide slot, the
rotary motion into linear motion, that is, the operation of torque,
thrust into action.
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