Gate valve product introduction

document.write ( '') valve document.write ( '') opening and closing member is a shutter, the shutter moving direction perpendicular to the flow direction, document.write ( '') valve document.write ( '') only Can be fully open and fully closed, can not be adjusted and throttled. The ram has two sealing faces. The two sealing faces of the commonly used sluice valves form a wedge shape. The wedge angle varies with the valve parameters, usually 50, and the temperature is not 2°52'''. The document.write('') wedge gate valve.write('') can be made into a whole piece called a rigid shutter; it can also be made into a gate that can produce a small amount of deformation to improve its craftability and make up The deviation of the angle of the sealing surface during the machining process is called a resilient shutter.

When the document.write('') gate valve.write('') ​​is closed, the sealing surface can be sealed only by the medium pressure, that is, the sealing surface of the gate is pressed against the valve seat on the other side by the medium pressure to ensure the sealing surface. The seal is self-sealing. Most of the gate valves are forced to seal, that is, when the valve is closed, the external force is forced to press the gate to the valve seat to ensure the sealing of the sealing surface.

Document.write('') ​​The gate of the document.write('') is linearly moved with the stem. It is called the lift gate valve (also called the open gate valve). Usually there is a trapezoidal thread on the lifting rod, and the rotary motion is changed into a linear motion by the nut at the top end of the valve and the guide groove on the valve body, that is, the operating torque is changed to the operating thrust.

Document.write('') gate valve document.write('') ​​When opening document.write('') valve document.write('') , when the gate lift height is equal to 1:1 times the valve diameter, the fluid The channel is completely unobstructed, but at runtime, this location cannot be monitored. In actual use, the apex of the valve stem is used as a mark, that is, the position where the valve is opened, as its fully open position. In order to consider the temperature change, the lock phenomenon is usually turned on to the apex position, and then back to 1/2-1 turn as the position of the fully open valve. Therefore, the fully open position of the valve is determined by the position of the shutter (ie stroke).

Some valves, the stem nut is set on the gate, the rotation of the handwheel drives the valve stem to rotate, and the gate is lifted. This valve is called the rotating rod document.write('') gate valve document.write('') or called Document.write('') Dark gate valve document.write('') .

The document.write('') gate valve document.write('') has the following advantages:

1. Document.write('') Gate valve document.write('') ​​The fluid resistance is small, and the sealing surface is less brushed and eroded by the medium.
2. Document.write('') Gate valve document.write('') is easier to open and close.
3. Document.write('') Gate valve document.write('') ​​The media flow is unrestricted, does not disturb, and does not reduce pressure.
4. Document.write('') gate valve document.write('') ​​is simple in shape, short in structure length, good in manufacturing process and wide in application range.

The disadvantages of document.write('') gate valve document.write('') are as follows:

1. Document.write('') gate valve document.write('') is easy to cause erosion and abrasion between sealing surfaces, and maintenance is difficult.
2. Document.write('') Gate valve document.write('') ​​has a large external size, requires a certain amount of space for opening, and has a long opening and closing time.
3. The document.write('') gate valve document.write('') structure is more complicated.

Document.write('') gate valve document.write ('') type, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, document.write ('') wedge gate valve document.write ('') can be divided into: single gate type, double gate type and elastic gate type; parallel gate type gate valve can be divided into single gate type and double gate type. According to the thread position of the valve stem, it can be divided into two types: open gate valve and dark gate valve.
Document.write('') gate valve document.write ('') installation and maintenance should pay attention to the following:

1. Document.write('') gate valve document.write ('') hand wheel, handle and transmission mechanism are not allowed to lift, and collision is strictly prohibited.
2. The document.write('') double gate valve document.write('') should be mounted vertically (ie the stem is in the vertical position and the handwheel is on the top).
3. document.write ( '') valve document.write ( '') document.write with a bypass valve ( '') valve document.write ( '') opening the bypass valve (to balance the opening should be preceded Importers Pressure difference and reduce opening force).
4. Document.write('') gate valve document.write('') with the drive's document.write('') gate valve document.write('') , installed as specified in the product's instruction manual.
5. If the valve is used frequently, it should be lubricated at least once a month.