What are the classification of gate valve

       Gate valve is a gate opening and closing parts, RAM direction of motion perpendicular to the direction of the fluid, valve can only be fully open and fully closed, can not be adjusted and the throttle.There are two gate sealing surface, the most common mode of gate valve sealing surface to form two wedge, wedge angle varies with the valve parameters, usually 50, medium is not high temperature is 2 ° 52'. 

      Wedge gate valve can be made into a whole, called the rigid gate; also be made to produce small deformation of the gate, in order to improve its process, make up the sealing surface angle deviations arising during processing,this gate is called the flexible gate. Stainless steel valve material is divided into 304 stainless steel gate valve, gate valve 316stainless steel, 321 stainless steel gate valve.

     Classification

     Types of stainless steel gate valve, the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate type,dual gate plate and the flexible gate type; parallel gate valve can be divided into single gate type, dual gate plate. Classified according to location of threaded stem, can be divided into the next shot and the dark bar gate valve two. This type valve should normally be installed horizontally in the pipeline.

Ball Screw Set

     Open the valve, when the gate valve lift height is equal to 1:1times the diameter, the fluid flow channel completely, but at run time, this position is unable to monitor. Actual use, is the apex of the stem as a symbol, which means that the fixed position, as its full open position. Temperature changes appear to consider locking phenomenon, usually open to the vertex position, and then rewind 1/2 1 circle, as a fully open valve position. 

     Therefore, the fully open position of the valve, based on the location of gate (i.e.travel 'to determine.

Some valve, the stem nut is located at the gate, hand wheel rotation to drive the valve rod, leaving gate to upgrade, this valve is called the rotating rod valve or valve called the dark bar.

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