果冻久久尤物

Stainless Steel Insulating Jacket Gate Valve BZ41W

Stainless steel gate valve opening and closing pieces is the gate, the direction of movement of the gate and the direction perpendicular to the fluid, the valve can only be fully open and fully closed, can not be adjusted and throttling, fluid resistance, sealing surface by the media brush And erosion is small, opening and closing more effort, the flow of unrestricted flow, do not spoiler, do not reduce the pressure, the body is simple, short structure length, manufacturing process is good, wide application.

Stainless steel gate valve opening and closing pieces is the gate, the direction of movement of the gate and the direction perpendicular to the fluid, the valve can only be fully open and fully closed, can not be adjusted and throttling. Gate has two sealing surfaces, the most common mode of the two gate valve sealing surface to form a wedge, wedge angle varies with the valve parameters, usually 50, the medium temperature is not high when the 2 ° 52 '. Wedge gate valve can be made into a whole, called the rigid gate; can also be made to produce trace deformation of the gate to improve its technology to make up the angle of the sealing surface in the process of generating the deviation, the gate The plate is called the elastic shutter.

Gate valve type, according to the sealing surface configuration can be divided into wedge gate type gate valve and parallel gate type gate valve, wedge gate type gate valve can be divided into: single gate type, double gate type and flexible gate type; parallel gate type gate valve Divided into single gate type and double gate type. According to the stem of the screw position, can be divided into two kinds of open-gate valve and the dark rod gate valve.

Gate valve closed, the sealing surface can only rely on media pressure to seal, that is, relying on the medium pressure to the gate of the sealing surface to the other side of the valve seat to ensure the sealing surface of the seal, which is self-sealing. Most of the gate valve is forced seal, that is, the valve is closed, to rely on external force to force the gate pressure to the valve seat to ensure the sealing surface of the seal.

Gate valve with the valve stem with a straight line movement, called the lift bar valve (also known as the Ming Barrier valve). Trapezoidal threads are usually provided on the lift rods. The rotary motion is changed to linear motion through the nut on the top of the valve and the guide groove on the valve body, ie the operating torque is changed to the operating thrust.

Open the valve, when the gate lifting height is equal to 1: 1 times the valve diameter, the fluid channel is fully open, but in operation, this position can not be monitored. The actual use, is based on the vertex of the valve stem as a sign, that is fixed position, as its full open position. In order to consider the phenomenon of temperature change lock phenomenon, usually in the open to the vertex position, and then back 1 / 2-1 laps, as a fully open valve position. Therefore, the valve fully open position, according to the gate position (ie stroke) to determine.

Some valve, stem nut located in the gate, the hand wheel rotation driven stem rotation, leaving the gate lift, this valve is called the rotary rod gate valve, or called the dark bar.