Simple working principle of vacuum pump: the circular motion of the motor, by mechanical means the diaphragm pump to do reciprocating motion, compressing and stretching in the pump cavity air to form the negative pressure, in the port and the external atmospheric pressure pumping pressure difference is generated, in under the action of the pressure difference, air suction pump cavity, from vent discharge lead.

济南精拓流体设备有限公司目前产品有：高压针阀、气控针阀、高压单向阀、气液增压泵、气体增压泵、气动增压系统、爆破试验台、气密性试验台等。

Jinan Jing Tuo fluid equipment Co., Ltd. current products are: high pressure needle valve, gas control needle valve, the high-pressure one-way valve, gas-liquid booster pump, gas booster pump, gas booster system, blasting test-bed, air test and so on.