Because the ball valve usually uses rubber, nylon and polytetrafluoroethylene as the seat sealing ring material, its use temperature is limited by the seat sealing ring material. The cutoff function of the ball valve is completed by pressing the metal ball under the action of the medium with the plastic seat (floating ball valve). Elastoplastic deformation occurs in the sealing ring of the seat under certain contact pressure. This deformation can compensate the manufacturing accuracy and surface roughness of the ball and ensure the sealing performance of the ball valve.

2023

Pneumatic ball valve function and use advantages

The working principle of the pneumatic ball valve is to make the valve open or blocked by rotating the spool. Pneumatic ball valve switch light, small size, can be made into a large caliber, reliable sealing, simple structure, easy maintenance, sealing surface and sphere are often in a closed state, not easy to be washed by the medium, in various industries have been widely used.

2023

Sealing advantages of manual ball valves

The main seat sealing ring material of all manual ball valves is polytetrafluoroethylene (PTFE), which is inert to almost all chemical substances, and has the comprehensive characteristics of small friction coefficient, stable performance, easy aging, wide temperature application range and excellent sealing performance. However, the physical properties of teflon, including high coefficient of expansion, sensitivity to cold flow and poor thermal conductivity, require that the valve seat seal be designed around these characteristics. Plastic materials for seat sealing also include filled teflon, nylon and many other materials. However, when the sealing material becomes hard, the reliability of the seal will be damaged, especially in the case of low pressure difference. In addition, synthetic rubber such as butadiene rubber can also be used as a seat sealing material, but it is suitable for the medium and the temperature range used is limited. In addition, if the medium is not lubricated, the use of synthetic rubber is easy to jam the sphere. In order to meet the requirements of high temperature, high pressure, strong erosion, long life and other industrial applications, the metal sealed ball valve has been greatly developed in the past ten years. Especially in industrially developed countries, such as the United States, Italy, Germany, Spain, the Netherlands, etc., the structure of the ball valve continues to improve, the emergence of fully welded valve body directly buried ball valve, lifting ball valve, so that the ball valve is more and more widely used in industrial fields such as long-distance pipelines and refining units. Ball valves with large diameter (3050mm), high pressure (70MPa) and wide temperature range (-196 ~ 815 degrees) have appeared, so that the technology of ball valves has reached a new level.

2023

Congratulations on the official launch of our website

Cangzhou Zhongyi Valve Co., Ltd. is an enterprise specializing in the production, processing and sales of precision casting, stainless steel valves and pipe fittings. The company implements total quality management, adopts modern production equipment and advanced quality control methods, and is equipped with high-precision CNC lathes, spectrometers, testing machines, impact machines, hardness machines and metallographic microscopy and other processing and inspection equipment.

2023

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86-0317-8316606

Cangzhou Zhongyi Valve Co., Ltd. is a company specializing in precision casting,Stainless steel valves and pipe fittings production, processing and sales of enterprises.

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Add: Fuzhuang Development Zone, Nanpi County, Hebei, China

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