The choice of valve body type for diaphragm pump The choice of valve body is the most important part of diaphragm pump selection. There are many types of diaphragm pump bodies. There are 10 types of single-seat, straight-through two-seat, angle, diaphragm, small flow, three-way, eccentric rotation, butterfly, sleeve, and spherical. Before selecting the valve, carefully analyze the media, process conditions and parameters of the control process, collect sufficient data, understand the system requirements for the diaphragm pump, and determine the type of valve to be used based on the collected data.

In the specific choice, you can consider the following aspects:

(1) The shape of the spool is mainly based on factors such as the selected flow characteristics and unbalanced forces.

(2) Abrasion resistance When the fluid medium is a suspension containing a high concentration of abrasive particles, the valve core and the valve seat joint face are severely rubbed each time they are closed. Therefore, the flow path of the valve should be smooth and the internal material of the valve should be hard.

(3) Corrosion resistance Because the medium is corrosive, in the case of meeting the adjustment function, try to choose a simple valve.

(4) Temperature and pressure of the medium When the temperature and pressure of the medium are high and the change is large, the valve and the material of the valve seat should be selected to be small in temperature and pressure.

(5) Prevention of flashing and cavitation Flashing and cavitation are only produced in liquid media. In the actual production process, flashing and cavitation not only affect the calculation of the flow coefficient, but also generate vibration and noise, so that the service life of the valve is shortened, so the valve should be prevented from flashing and cavitation when selecting the valve.