Hokaido vacuum pump company sorts out some of the common faults of industrial vacuum pumps, and how to troubleshoot and repair methods for customer friends to refer to and use.
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Common fault one: the vacuum pump cannot be started
Possible causes and corresponding repair methods:
1. The power cord is not connected correctly - check and repair the power cord;
2. The power supply voltage of the supply motor does not match the motor - replace the motor;
3. Motor failure - replace the motor;
4. Pump oil temperature is lower than 10 °C - heat the vacuum pump or use other types of vacuum pump oil;
5. The pump oil is too viscous - oil change;
6. The exhaust filter or exhaust pipe is blocked - cleaning the filter or exhaust pipe;
7. The pump is stuck - repair the pump.
Common fault two: the vacuum pump can not reach the limit pressure
Possible causes and corresponding repair methods:
1. The measurement method or regulation is not suitable - use the correct measurement method and regulation / directly measure the vacuum at the inlet of the pump;
2. Anti-return valve failure - maintenance of anti-return valve;
3. Exhaust valve failure - maintenance of exhaust valve;
4. Vacuum pump oil is not suitable - oil change (if necessary, the oil is degassed);
5. The air inlet is polluted - cleaning the pumping pipe;
6. The pumping speed of the pump is too small - confirm the system parameters, if necessary, change the pump.
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Common fault three: the pumping speed is too slow
Possible causes and corresponding repair methods:
1. The air inlet or intake pipe is blocked - cleaning the intake pipe (installing a debris filter in front of the air inlet can prevent such failures);
2. The exhaust filter is blocked - replace the filter;
3. The diameter of the connected vacuum tube is too small or the pipe is too long - use a pipe with a large enough diameter or a short connecting pipe.
Common fault four: after stopping the pump, the pressure in the pumped container rises too fast
Possible causes and corresponding repair methods:
1. The vacuum system has a leak - check the system;
2. Anti-return valve failure - maintenance of anti-return valve.
Common fault five: the temperature of the vacuum pump is too high during operation
Possible causes and corresponding repair methods:
1. The air required for the cooling pump is blocked - the vacuum pump should be installed correctly (there should be enough space at the rear of the motor);
2. The ambient temperature of the pump is too high - reduce the ambient temperature, the maximum allowable ambient temperature is 40 °C;
3. The temperature of the pumped gas is too high - change the process;
4. The oil level is too low - refueling;
5. The oil is not suitable - oil change;
6. The circulation of vacuum pump oil is blocked - clear or maintenance of the oil inlet;
7. The exhaust filter or exhaust pipe is blocked - replace the filter core, clean the exhaust pipe;
8. Exhaust valve failure - repair exhaust valve;
9. The pump chamber is worn - replace the pump chamber components.
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Common fault six: oil is found in vacuum pipes or pumped containers
Possible causes and corresponding repair methods:
1. The oil comes from the vacuum system - check the vacuum system;
2. Anti-return valve failure - cleaning or repairing the anti-return valve;
3. The sealing surface of the anti-return oil valve is worn or too dirty - cleaning or repairing the air inlet and the anti-return oil valve;
4. The oil level is too high - let go of the excess pump oil.
Common fault seven: vacuum pump oil turbidity, emulsification
Possible causes and corresponding repair methods: condensable gas condensation – degassing or oil change of oil and flushing the pump chamber can prevent such problems by opening the ballast valve in advance.
Common fault eight: the noise of the vacuum pump is too large
Possible causes and corresponding repair methods:
1. The oil level is too low (the oil can no longer be seen in the observation window) - refueling;
2. The silencer hole is blocked - cleaning or replacing the silencer hole components;
3. The pressure of the inlet is too high - reduce the pressure of the inlet;
4. The internal oil mist filter is blocked - cleaning or replacing the oil mist filter;
5. Elastic coupling body wear - replace a new elastic coupling body;
6. Damage to blades or bearings - repair the pump.
In the process of using the vacuum pump, when encountering a fault, you can follow the methods mentioned here to troubleshoot and repair them one by one; If you can't solve it yourself, please contact Hokaido vacuum pump manufacturer to consult for understanding, Good CapitaLand vacuum pump also provides convenient and efficient vacuum pump maintenance services.