The circulating water type multi-purpose vacuum pump is a new type of anticorrosive shell with high-power multi-purpose air pumping. The internal and external circulating water is designed in this machine. The circulating water type multi-purpose vacuum pump can pump air at the same time with five heads. It has the advantages of no oil, no pollution, high power, low noise, convenient and flexible, water-saving and power-saving.

The main operation methods of the equipment are as follows:

1. Put the multi-purpose vacuum pump of circulating water on the working table. When using it for the first time, open the upper cover of the water tank and fill it with clean cold water (or add water through the drain hose). When the water surface is about to rise to the height below the overflow nozzle behind the water tank, stop adding water. If the machine is started repeatedly, no water will be added. The water should be replaced at least once a week. If the water quality is seriously polluted and the utilization rate is high, the time for replacing water must be shortened to keep the water quality in the water tank clean.

2. Connect the suction sleeve of the equipment to be vacuumized tightly to the suction nozzle of the unit. Turn off the cycle switch, turn on the power supply, and turn on the power switch. The vacuum degree can be observed through the vacuum meter corresponding to the suction nozzle.

3. When the multi-purpose vacuum pump for circulating water needs to operate continuously for a long time, the water temperature in the water tank will rise, which will affect the vacuum degree. At this time, the drain hose can be connected with the water source (tap water), and the overflow nozzle can be used as the drainage outlet. By properly controlling the flow of tap water, the water temperature in the water tank will not rise and the vacuum degree will be stable.

4. When it is necessary to provide cooling circulating water for the reaction device, on the basis of the third operation above, connect the inlet and outlet pipes of the device to be cooled to the circulating water outlet nozzle and water inlet nozzle at the rear of the machine, and turn the circulating water switch to on position to realize the circulating cooling water supply.