The choice of choosing a valve body is the most important part of the selection of the diaphragm pump. There are many types of diaphragm pump valve. Commonly used are 10 types such as direct single -seat, two -seater, horned, diaphragm, small flow, three -way, eccentric rotation, butterfly, sleeve, and spherical shape. Before selecting the valve, carefully analyze the media, process conditions and parameters of the control process, collect sufficient data, understand the requirements of the system on the diaphragm pump, and determine the type of valve to use according to the collected data. In the specific choice, you can consider from the following aspects:

(1) The shape structure of the valve core is mainly considered according to factors such as the selected flow characteristics and unbalanced force.

(2) Damage -resistant When the fluid medium is suspended from high concentration wear particles, each time the valve core and valve seat junction surface is closed, it will be severely friction. Therefore, the flow of the valve should be smooth, and the internal materials of the valve should be hard.

(3) Due to corrosive corrosion resistance, when the medium is corrosive, the structure of simple structure is selected as much as possible without the regulatory function.

(4) When the temperature and pressure of the medium When the temperature, the pressure of the medium is high, and the change is large, the material of the valve core and the valve seat should be selected from the valve with a small temperature and pressure change.

(5) Prevent flashing and vacation flashing and vacation only produce in the liquid medium. In the actual production process, flash steaming and vacation not only affect the calculation of the flow coefficient, but also form vibration and noise, which shorten the service life of the valve. Therefore, when selecting the valve, the valve should be prevented from flashing and vacating.