Vacuum Pump Troubleshooting

With the construction and development of industry, many industries such as metallurgy, electronics, and coating have put forward higher requirements for the extraction of gas or particles from equipment. The large demand for industrial production and the rapid development of technology have made the production process of vacuum pumps continue to improve. Gradually occupy a larger market share in industrial production. With the continuous improvement of the level of vacuum pump manufacturing technology, the structural design of vacuum pumps is more refined, and different equipment structures also enable vacuum pumps to work in different industrial environments. Different types of vacuum pumps are driving the industry with a rapid growth momentum. The following form is a brief list of common problems and maintenance methods.

vacuum pump

Issue	Reasons	Check & Repair
oil has been found in vacuum pipes or inhaled container	Oil comes from vacuum system	Check vacuum system
	Failure of anti-reflow valve	Clean and wash anti-reflow valve
	Sealing surface of anti-reflow vavle is worn or dirty	Clean or repair air inlet and anti-reflow vavle
	Oil is too much	Drain the excess pump oil
Pump oil is turbid and emulsified	gas condensation	Degas the oil or change the oil and wash pump chamber Prevention: Open gas ballast valv
Pump is making noisy	The oil is too less (the oil is no longer visible in the observation window)	Charge the oil
	Silencer hole is blocked	Clean or change silencer parts
	Inlet pressure is too high	Reduce inlet pressure
	internal oil mist filter is blocked	Clean and change the oil mist filter
	Abrasion of esilient coupling	Change to a new esilient coupling
	Damaged blade or bearing	Repair the pump
The speed of pumping is too low	Air inlet or air inlet pipe is blocked	Clean air inlet pipe (prevention: or install a debris filter outside the air inlet
	Exhaust filter is blocked	Change the filter
	The diameter of the connecting vacuum pipe or the pipe is too long	Use the pipe has suitable diameter or shorter connecting pipe
After the pump stops, the pressure in the pumped container rises too fast	Leakage in vacuum system	Check the system
	Failure of anti-reflow valve	Repair the anti-reflow vavle
The temperature of the operating pump is too high	The air required by the cooling pump is blocked	Install it properly (should be leaving enough space after the motor)
	The temperature of working place is too high	Reduce the temperature, the maximum allowable temperature is 40 degrees
	The temperature of absorbed gas is too high	Change method
	Oil is too less	Charge the oil
	Oil is not suitable	Change the oil
	Pump oil circulation is blocked	Clean or wash the inlet nozzle
	Exhaust filter or tube is blocked	Change the filter core、Clean exhaust filter and tube
	Failure of exhaust valve	Repair the exhaust valve
	Abrasion of pump chamber	Replace pump chamber parts
Pump cannot be started up	The power cord is incorrectly connected	Check and fix power cable
	The power supply voltage to the motor does not match the click	Change the motor
	Motor failure	Change the motor
	The temperature of pump oil is lower than 10 degrees	Heat pump and pump oil up or use other types pump oil
	Pump oil is too sticky	Change the oil
	Exhaust filter or tube is blocked	Clean exhaust filter and tube
	Pump is blocked	Repair the pump
The pump cannot reach the ultimate pressure	Measurement method or gauge head is not suitable	Use the correct measuring method and gauge/measure the vacuum directly outside the pump inlet
	external leakage	—
	Failure of anti-reflow valve	Repair the anti-reflow valve
	Issue of exhaust valve	Repair exhaust valve
	Pump oil is not suitable	Change the oil (degas the oil if necessary)
	Air inlet is polluted	Clean absorbing pipe
	The pumping speed is too low	Confirm the system parameters and change the pump if necessary