In the process of using the vacuum pump, we need to pay attention to many aspects. If it is used improperly, it will have a great impact on the entire vacuum system and even bring great economic losses to the enterprise. The precautions for use are summarized as follows, hoping to help everyone.

①If the experimental system being pumped contains easily condensable vapors, volatile liquids or corrosive gases, the vacuum pump cannot be used to pump the system directly, and a condenser and a gas washing bottle should be connected between the system and the air inlet pipe of the pump. or absorption bottle to remove the above gas.

②A three-way piston should be connected before the intake pipe of the pump. Before the vacuum pump stops running, the air inlet of the pump should be connected to the atmosphere through the three-way piston, so as to prevent the pump oil from being sucked back and polluting the experimental system.