How to choose the miniature vacuum pump

Miniature vacuum pumps can be divided into two categories: single suction and air pumping. If the pump is only used for pumping, the exhaust port of the pump is unobstructed. However, if the pump end has large load, the vacuum pump with strong suction and high vacuum needs to be selected.
As for the size of the suction end resistance of the pump, it is usually concluded that a simple method is chosen according to the experience, for example, the following conditions are attributed to a large load (that is, the pump's suction end resistance is larger).
(1) at the pump end, a long pipe must be connected to the pump end, or the pipeline will be tortuous and tortuous, even blocking or closing, or the inner hole of the pipe is very small (for example, less than 2 mm).
2. There are throttle valves, solenoid valves, air path switches, filters and other components on the pipeline.
3. The pump air inlet is connected with the closed container or the closed container, but the intake volume is small.
(4) the connection between the pump suction port and the suction cup is used to adsorb objects (integrated blocks, etc.);
The suction end of the pump is connected with the filter container for accelerating liquid filtration.