To maintain air tightness, the valve must have a good seal. If there is a problem with the seal, there will be air leakage.   As a control component in the fluid conveying system, the valve has the functions of cut-off, regulation, diversion, prevent...

After the valve is used for a long time, the sealing surface of the valve disc and the valve seat will be worn and the tightness will be reduced. Repairing the sealing surface is a large and very important task. The main method of repair is grinding....

At first glance, there are not many valve parts, simple structure, and average precision. They are simple parts in the machinery industry, but the core sealing parts of the valve are particularly demanding. The valve manufacturing process is complex ...

1. Leakage at the packing of soft seal gate valve (1) The packing gland is too loose, and the nuts used to compress the packing gland can be tightened evenly. (2) The number of packing circles is not enough, so packing should be added. (3) The packin...

   When it comes to flanges, many people may not have a special understanding, and they may not be particularly familiar in our daily lives. However, it is very common in some pipeline projects. There are holes in the flanges and bolts make the flang...

Cleaning method Welding slag, rust, slag, etc. in the pipeline cause blockage or jam in the throttle, guide part, and balance hole of the lower bonnet, causing strain and scratches on the valve core surface and guide surface, and indentation on the s...

The main features of flanged butterfly valves are: 1. Small and light, easy to disassemble and repair, and can be installed in any position. 2. The structure is simple and compact, the operating torque is small, and the 90° turn to open quickly. 3. T...

        With the reform and progress of the times, my country's valve products are constantly innovating along with the change of the times. At present, in the valve market where environmental protection and safety are becoming more and more demandi...

Exhaust valves are used in independent heating systems, central heating systems, heating boilers, central air conditioners, floor heating and solar heating systems and other pipeline exhaust. Because there is usually a certain amount of air dissolved...

Selection of check valve structure Ordinary check valve is mainly composed of spool, valve seat and spring. Spool Most spools are either ball valves or poppet valves. The difference between these two structural forms is mainly reflected in the tightn...

The valve is a control component in the pipeline fluid transportation system. It is used to change the cross-section of the passage and the direction of the medium flow. It has the functions of diversion, cut-off, throttling, check, shunt or overflow...

1. Valve grinding inspection   During the grinding process, the inspection stage is always run through. The purpose is to keep abreast of the grinding situation at any time, to be aware of the situation, and to achieve the technical requirements of t...