ANSI DIN JIS Cast Iron Nrs Soft Seal Gate Valve (GTV-055-B)

The opening and closing part of the soft seal gate valve is the gate, whose motion direction is perpendicular to the fluid direction. The gate valve can only be fully opened and closed, and cannot be adjusted or throttled.There are two sealing faces of gate valve, the two sealing faces of the most commonly used model gate valve form wedge, wedge Angle varies with valve parameters, nominal diameter is DN50 ~ DN1200, service temperature: ≤200ºC.
Wedge gate valves can be made into a single block, called a steel gate;It can also be made into a small deformation of the gate, in order to improve its process, make up for the sealing surface Angle in the processing of the deviation, called elastic gate.
There are two kinds of soft seal gate valves: bright stem soft seal gate valve and dark stem soft seal gate valve.Usually there are trapezoidal threads on the lifting rod, through the nut in the middle of the gate and the guide groove on the valve body, to change the rotation motion to a straight line, that is, to change the operating torque to the operating thrust.When the valve is opened, when the gate lift height is equal to 1:1 of the valve size, the flow passage is fully open, but this position cannot be monitored during operation.In practice, it is marked by the peak of the stem, that is, the open position, as its full open position.In order to allow for temperature changes in the appearance of locking, usually at the top of the open position, and then back 1/2-1 turn, as the full open valve position.Therefore, the full open position of the valve is determined by the position of the gate (i.e. the stroke >).This class of valves should generally be installed horizontally in the pipeline.
ANSI NRS Soft seal gate valve: 
DIN NRS Soft seal gate valve: 
BS NRS Soft seal gate valve: