1. Design Selection: Ensuring Durability from the Source

Select high-quality materials and manufacturing processes

Prioritize corrosion-resistant, high-strength materials (such as stainless steel and cast iron alloys) to minimize component damage caused by medium corrosion or high pressure.

Focus on manufacturing processes, such as precision casting and dynamic balancing, to ensure structural stability of the pump body and reduce operational vibration.

Match operating conditions

• Select the appropriate model based on actual requirements to avoid “overkill” or overload operation. For example, if corrosive gases need to be extracted, choose an acid-alkali resistant model; if high vacuum is required, confirm that the pump's ultimate vacuum meets the requirements.

2. Installation Environment: Creating Optimal Operating Conditions

Clean and Dry Locations

• Avoid installation in dusty, humid, or high-temperature environments to prevent contaminants from entering the pump body or lubricating oil from degrading. For example, chemical workshops should install dust covers, and humid areas should be equipped with dehumidification equipment.

Stable foundation and support

• Ensure the pump body is securely installed to prevent vibration from being transmitted to the pipeline or motor, reducing the risk of loose connections.

Reasonable pipeline design

Minimize the length of inlet and outlet pipelines, reduce the number of elbows, and lower fluid resistance. For example, the inlet pipeline diameter should be ≥70% of the pump inlet diameter, and the outlet pipeline should avoid right-angle bends.

3. Operating Procedures: Preventing Human-Caused Damage

Pre-startup Inspection

• Verify the motor rotation direction is correct (typically marked on the motor), preventing reverse rotation from damaging the impeller.

• Check oil level, belt tension (ideally able to be pressed down 10-15mm), and power voltage stability (fluctuation range ≤ ±10%).

Monitoring During Operation

• Regularly record parameters such as vacuum level, temperature, and current to ensure they remain within design specifications. For example, oil temperature should be controlled between 30-80°C, and bearing temperature should not exceed 75°C.

• Listen for operational sounds; abnormal noises (such as metal friction sounds) may indicate impeller wear or foreign object ingress.

Post-Shutdown Procedures

• Shut down the pump after closing the inlet and outlet valves to prevent gas backflow from impacting the pump body.

• When the pump is not in use for an extended period, drain the liquid from the pump, rotate the impeller to prevent rusting, and lubricate the bearings regularly.

4. Maintenance and Inspection: Extend Component Lifespan

Regularly replace lubricating oil

• The first oil change should be performed after the new pump has run for 150 hours, followed by subsequent changes every 2,000–3,000 hours or every six months. If the oil shows signs of emulsification or carbonization, it must be replaced immediately.

Cleaning and Inspection

• Clean the intake/exhaust filters monthly to prevent blockages that could reduce vacuum pressure.

• Inspect seals (such as shaft seals and oil seals) quarterly, and replace them promptly if they are aged or damaged.

• Clean the bearings and replace the lubricant annually to ensure smooth rotation.

Adjustment and Calibration

• Regularly check belt tension to avoid slippage due to excessive slack or increased bearing load due to excessive tightness.

• Adjust the tightness of the packing gland to ensure appropriate leakage (preferably dripping), preventing overheating and wear of the packing.

5. Fault Prevention: Address potential issues promptly

Cavitation

• When the suction pressure approaches the vapor pressure of the working fluid, cavitation occurs in the compression chamber, damaging the impeller and pump body. This can be mitigated by adjusting the cavitation valve or increasing the water supply.

Impeller Wear

• Regularly inspect the clearance between the impeller and the distributor plate (typically 0.15–0.20 mm). If the clearance is too large, adjust or replace the impeller.

Motor Overload

• Avoid prolonged high-load operation and ensure stable supply voltage. If the motor frequently overheats, check for phase loss or impeller jamming.