How to choose a diaphragm pump?

The selection of micro-diaphragm pumps requires comprehensive consideration of various factors such as application scenarios, diaphragm pump types, rated pressure, etc., to effectively reduce the input power of the prime mover, improve the mechanical energy conversion efficiency, and improve the reliability and durability of the system.

1. In the selection of diaphragm pump types, focus on the application scenarios. In indoor working environments, it should focus on improving its mechanical efficiency, usually using vane hydraulic pumps; in outdoor working environments, such as road construction, ports, construction and other small construction machinery systems Among them, it is advisable to focus on its stability improvement and its durability, usually a plunger type diaphragm pump is used.

2. In the selection of hydraulic oil, focus on hydraulic working conditions and operating conditions, such as temperature range, humidity, etc., especially for fire-prone environments, should consider the selection of flame-retardant or fire-resistant hydraulic oil such as phosphate esters.

3. In the selection of rated pressure and flow rate of diaphragm pump, it is required that the rated pressure must be higher than the nominal pressure of the actuator. To ensure the reliability of the hydraulic system, the rated pressure of the pump should be 1.5 of the nominal pressure of the actuator (such as hydraulic cylinder). times or more; its rated flow rate needs to be higher than the maximum value of the sum of the flow rates required by the instantaneous motion actuators.

4. In the selection of volumetric efficiency of the diaphragm pump, after the pump is used for a period of time, its volumetric efficiency will be reduced to a certain extent, and each index can be 1% lower than that of the quantitative pump of the same displacement.

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