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The valve can be installed on the flange only after the flange is welded to the pipe and cooled to ambient temperature. Otherwise, the high temperature generated by welding will affect the performance of the elastic valve seat.

After the valve is closed for 4-6 hours, use an infrared temperature measuring instrument to measure the temperature of the valve stem (near the valve body) or the metal temperature 150mm downstream of the valve body. If it is greater than 70°C, it is regarded as “internal leakage”. This judgment method is applicable to most internal leakage valves.

Seal elements are frequently used sealing parts for machinery and equipment, and are materials that play a sealing role. From this definition, it is not difficult for us to know how important the seal element is, so how to install the seal element is worthy of our attention. The correct installation can ensure the sealing performance and make the equipment run smoothly, otherwise it will damage the sealing seal element. Next, let’s take a closer look at what should be done.

The materials for manufacturing valve parts should be selected according to the following factors

1. The pressure, temperature and characteristics of the working medium.
2. The force of the part and its function in the valve structure.
3. It has better manufacturability.
4. If the above conditions are met, there must be a lower cost.

The casting is formed by integral pouring of the material in the mold, and its stress distribution is uniform, and there is no restriction on the direction of compression. The forgings are pressed by forces in the same direction, and their internal stresses are directional and can only withstand directional pressure.

With the advancement of science and technology, the #butterfly #valve manufacturing process has become more sophisticated, and different types have been extended from this, and the uses have become more and more extensive. What types of butterfly valves are there? What is the corresponding model?

The WAFER TYPE DUAL PLATE CHECK VALVE relies on the flow of the medium to automatically open and close the plates to prevent the medium from flowing back and the water hammering effect;
The two discs rotate around the middle valve shaft, just like two sliding doors, and are equipped with springs at the same time to help the two discs move in the direction of valve closing

The Y-type strainer is an indispensable strainer device in the pipeline system for conveying the medium. The Y-type strainer is usually installed at the inlet of a pressure reducing valve, a pressure relief valve, a fixed water level valve or other equipment to remove impurities in the medium. , In order to protect the normal use of valves and equipment. The strainer is suitable for liquid and gas materials in the production of chemical, petrochemical, light industry, etc., to strainer their solid impurities.

Viton-lined valves have been widely used in petroleum, chemical, pharmaceutical, metallurgical, electric power and other industries that are exposed to acid and alkali and other strong corrosive media. However, how to choose and use viton-lined valves is based on our customers for many years. Field application experience, when selecting viton-lined valves, the following precautions are put forward for several operating conditions such as medium temperature, pressure, and pressure difference: