Air operated diaphragm pumps selection:
AODD pump as a common type of diaphragm pump, the correct selection of its service life is self-evident. So do you know what problems need to be considered when choosing pneumatic diaphragm pump selection?
Pneumatic diaphragm pump selection in the selection of factors:
1. The shape and structure of the spool are mainly considered according to the selected flow characteristics and unbalance force.
2. Wear resistance When the fluid medium is a suspension containing high concentration of wear particles, the spool and seat joint surface will be severely friction each time it is closed. Therefore, the flow path of the valve should be smooth, and the internal material of the valve should be hard.
3, corrosion resistance due to the corrosive medium, in the case of can meet the adjustment function, try to choose simple structure valve.
4, the temperature and pressure of the medium when the temperature and pressure of the medium are high and the change is large, the material of the spool and seat should be selected by the small change of temperature and pressure of the valve.
5. Prevent flash evaporation and cavitation Flash evaporation and cavitation are only produced in liquid media. In the actual production process, flash and cavitation not only affect the calculation of flow coefficient, but also form vibration and noise, so that the service life of the valve is shortened, so the valve should be prevented from flash and cavitation when selecting the valve.
Pneumatic diaphragm pump liquid temperature is how many degrees, there is no more than 80 degrees, the temperature has a great impact on the performance of pneumatic diaphragm pump, because the diaphragm material of pneumatic diaphragm pump is made of polygel or tetrafluoroidal material, such as the temperature is too high diaphragm will become soft.
