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Problems needing attention in valve selection of pneumatic diaphragm pump

2021-10-25 08:47:57
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Cavitation and multi effect evaporation of pneumatic diaphragm pump will endanger the calculation of flow coefficient in specific production process at the same time. Noise and vibration will also be reasonably generated in the application process, which will immediately reduce the service life of the valve. Therefore, it is necessary to avoid valve cavitation and multi effect evaporation in the whole process of valve selection.

Pneumatic diaphragm pump

The primary factor of pneumatic diaphragm pump is the variety of commercial valve body, which is a very key part in the selection of valve body. Common valve bodies include small total flow, direct double seating, axial rotation, diaphragm, ball, disc, etc. Before selecting the valve body, be sure to analyze the main parameters of the medium in the whole process of operation. The key is to consider the factors such as liquidity, performance and sense of imbalance. In the selection of valve body of pneumatic diaphragm pump, the key is based on the shape and structure of its valve core.

The wear resistance of pneumatic diaphragm pump is mainly that when the liquid medium contains a solution of wear-resistant material particles with high concentration, the composition of valve core and valve ball will be seriously rubbed each time it is closed. The material inside the valve must be hard and solid, and the flow path of the valve should be smooth. The corrosion of machinery and equipment is mainly caused by the erosion of medium. When the machine and equipment reach the control function, be sure to choose the valve with simple structure as far as possible.

Pneumatic diaphragm pump must use high-pressure gate valve and valve core raw materials that are vulnerable to temperature and working pressure changes. During the application of pneumatic diaphragm pump, the temperature and burden of medium will cause great changes. In order to avoid cavitation, flashing should be carried out only in liquid medium.

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