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The Characteristics Of The Sealing Material Of The Gate Valve Are Introduced

Oct 11, 2017

Soft seal gate valve is divided into the right soft seal gate valve and dark rod soft seal gate two. Usually on the lift bar with trapezoidal thread, through the middle of the gate nut and the valve body on the guide groove, the rotary motion into a linear motion, that is, the operating torque into the operating thrust. When the valve is opened, when the lift height is equal to 1: 1 times the diameter of the valve, the fluid channel is completely open, but this position can not be monitored during operation. The actual use of the stem is the vertex as a sign, that is, the location of the open, as its full open position.Gate Valve In order to consider the temperature changes appear locking phenomenon, usually in the open to the vertex position, and then back 1 / 2-1 lap, as the full valve position. Therefore, the fully open position of the valve, according to the position of the gate (ie stroke to determine.) This type of valve in the pipeline should generally be installed horizontally. Hard seal is a seal between metal and metal, sealed ball and seat are metal. Processing accuracy and process more difficult, generally used in high pressure, usually more than 35MPa. Soft seal is a metal and non-metallic seal between, Such as nylon \ tetrafluoroethylene, the manufacturing standards are the same.Gate Valve

Elastic soft seal gate valve and hard seal gate valve is the sealing material of the seat, the hard seal is the valve seat material precision machining to ensure that with the spool (ball) with the accuracy, generally have stainless steel and copper. The sealing material embedded in the valve seat is a non-metallic material, because the soft sealing material has a certain flexibility, so the processing accuracy requirements relative to the hard seal will be low.Gate Valve