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1. Preparation.

Put the water circulating vacuum pump on the working table. When it is used 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, and start the machine repeatedly to stop adding water. 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. Vacuum operation.

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 water circulating vacuum pump 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.

Water circulation vacuum pump is widely used in industry, water plant, crop irrigation, factories, etc., its role is quite strong.