Author: Peter Lee

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:

After the installation of the pump room and the piping system, it is often found that when the system is running, when the pump is stopped or the power is cut off, the piping system will have a great impact of water, impacting the pump, valve and pipeline, and some Water hammer may be very light, but some are serious, and even worse, serious quality accidents may occur. For example, valve discs, water pump blades, piping systems, etc. are crushed or broken by water. Such damage is caused by water hammer. Yes, we have also encountered this phenomenon in foreign projects.

The foot valve is composed of valve body, valve bonnet, valve disc, sealing ring and gasket. The English name is Foot Valve or bottom Valve, which is a kind of check valve. After the shutdown, the water in the suction pipeline is drained.