Vacuum Pump Installation and Operation Guide

What is a Vacuum Pump?

A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate gas from a sealed container to achieve a vacuum. In simple terms, it is a device used to create, improve, and maintain a vacuum in an enclosed space through various methods.

Installation Instructions

1)Location: The pump should be installed on a solid, stable surface with ample space around it for inspection, maintenance, and servicing.

2)Foundation & Vibration Damping: Ensure the foundation under the pump base is level. It is recommended to place anti-vibration rubber pads at the four corners of the base or use bolted mounting to ensure smooth, low-vibration operation.

3)Piping Connection: The connection pipeline between the pump and the system must be reliably sealed.

a:For smaller pumps, metal piping with oil-resistant rubber gaskets can be used.

b:For larger pumps, vacuum hoses can be used.

c:The pipe diameter must not be smaller than the pump's suction port diameter. Keep pipelines short with minimal bends.

d:Warning: When welding pipes, remove all welding slag from the pipeline. Strictly prevent slag from entering the pump chamber.

4)Ancillary Components: Users may install a valve and vacuum gauge above the pump inlet to monitor the pump's ultimate pressure.

5)Electrical Connection: Connect the power supply according to the motor nameplate specifications. Ensure proper grounding and install correctly rated fuses and thermal relays.

6)Direction Check: Before initial power-on test run, remove the motor drive belt. Confirm the pump rotation direction matches the indicated direction on the protective cover before putting it into operation. This prevents oil ejection due to reverse rotation.

7)Cooling Water: For pumps requiring cooling water, connect the cooling water supply as specified.

8)Solenoid Valve: If a solenoid valve is installed at the pump inlet, ensure it operates simultaneously with the pump.

9)Exhaust: If the exhausted gas affects the working environment, connect an exhaust pipe to vent it away or install an oil mist filter at the exhaust port.

Operating Instructions

1)Close the valve located above the pump.

2)For pumps with cooling water, turn on the cooling water supply.

3)Pre-start Check (Crucial): Manually rotate the drive pulley several times in the specified direction to drain oil from the pump chamber into the oil reservoir. This helps prevent oil ejection during startup.

Especially in winter, higher oil viscosity increases startup load. Pay special attention to this step.

4)Startup & Observation:

a:Start the motor.

b:Observe the oil sight glass. The oil level should be at the center mark.

Oil level too high can cause oil ejection.

Oil level too low leads to inadequate lubrication and failure to achieve the specified ultimate pressure.

c:Refer to the pump's instruction plate for oil filling and draining locations.

d:Slowly open the valve above the pump to begin system operation.

e:Note: When the pump is idle, oil drains into the pump body, so the oil level is almost invisible in the sight glass. The correct oil level is determined during operation.

5)Cooling Water: Inlet water temperature should not exceed 30°C. The temperature difference between inlet and outlet should not exceed 3°C.

6)Low Ambient Temperature (<5°C): Drain the pump oil, heat it to 15-30°C, then refill before starting the pump.

7)Pump Temperature: The difference between oil temperature and ambient temperature should not exceed 40°C. If it does, enhance ventilation/heat dissipation or increase cooling water flow.

8)High Inlet Gas Temperature (>40°C): If gas temperature causes excessive pump temperature, take measures to cool the gas.

9)Reactive Gases: If the intake gas may affect the pump oil or pump itself, install a suitable filtration device upstream of the pump inlet.

10)Condensable Gases: When pumping gases containing small amounts of condensable vapors, open the gas ballast valve and operate for about 30 minutes after startup. This extends pump oil life.

11)Particulate/Dusty Gases: When pumping gases containing particles or dust, install a suitable filter upstream of the pump inlet.

12)Shutdown Sequence:

a:Close the valve above the pump to isolate it from the system.

b:Stop the pump.

c:Tighten the gas ballast valve to prevent oil leakage.

d:Turn off the cooling water.

e:In freezing conditions: Drain all cooling water from the pump to prevent chamber cracking.

Note: The above information is for reference only. For specific models or series, please always refer to the corresponding product manual.