| Fault phenomenon | Cause of occurrence | Exclusion method | |||
| Low vacuum degree | blow-by | Inaccurate measurement | Calibration measurement system | ||
| External leakage | Vacuum pipeline leakage | Air pressure leak detection or disassembly inspection, repairing leaks, replacing damaged or aged sealing rings and gaskets, and tightening loose bolts | |||
| Pump body leaks air | Air leakage in the oil inlet pipe | Tighten the joint or replace the damaged parts, and seal the joint with sealant again | |||
| Rubber oil seal or shaft sleeve worn and leaking | Replace the oil seal and shaft sleeve | ||||
| Leakage of vacuum sealing surfaces such as pump cover or air inlet | Remove the parts and reseal the flat surface | ||||
| Internal leakage | Insufficient oil intake, resulting in abnormal oil film sealing inside the pump | Blocked oil circuit | Remove the oil pipe for cleaning | ||
| The oil inlet valve is blocked | Check if the oil inlet valve is open | ||||
| The pump temperature is too high, causing abnormal oil film sealing inside the pump | Insufficient cooling water volume or high inlet water temperature | Increase the amount of water or decrease the temperature of cooling water | |||
| Excessive inlet water temperature | Air inlet with condenser | ||||
| Excessive ambient temperature | Improve the cooling effect of cooling water or reduce ambient temperature | ||||
| Poor oil quality, insufficient oil viscosity, resulting in abnormal oil film sealing inside the pump | change oil | ||||
| Part wear | Damaged exhaust valve | Open the fuel tank cover and repair the exhaust valve | |||
| Worn parts such as slide valves, guide rails, eccentric wheels, pump bodies, partitions, pump covers, etc., resulting in increased clearance between parts inside the pump | Remove the pump cover, inspect, repair, and replace damaged parts | ||||
| inside
Bleeding |
Excessive pump temperature leads to an increase in oil saturation vapor pressure | Increase cooling | |||
| Poor oil quality leads to an increase in oil saturation vapor pressure | change oil | ||||
| The noise is loud, and the pump is overheated | Loose parts such as exhaust valves, exhaust hoods, belt covers, etc | Tighten loose parts | |||
| Spool valve, guide rail, eccentric wheel, pump body worn, bearings damaged | Repair or replace parts | ||||
| Belt slipping | Adjust the belt tension or replace the belt, clean the pulley | ||||
| Foreign objects entering the pump chamber | Cleaning foreign objects | ||||
| Cooling water, environment, intake air temperature too high | Increase cooling effect | ||||
| The pump operates under high inlet air pressure for a long time | Leak detection or control of the exhaust volume of the pumped system | ||||
| Exhaust valve stuck or worn | Repair or replace parts | ||||
| Insufficient oil volume, blocked oil circuit | Clean the oil circuit or add oil | ||||
| Foreign objects entering the pump chamber | Disassemble the pump to clean foreign objects | ||||
| Spool valve, guide rail, eccentric wheel, pump body worn, bearings damaged | Repair or replace parts | ||||
| Poor oil quality | change oil | ||||
| Belt too tight or too loose | Adjusting the Belt Tightness | ||||
| Slow down or stuck pump operation | Belt too tight or too loose | Adjust the belt tension or replace the belt, clean the pulley | |||
| The last time the pump was stopped, it was not operated according to the operating procedures, the oil inlet valve was not closed properly, and a large amount of oil entered the pump chamber, making it difficult to start the pump next time | Follow the operating procedures and replace the damaged oil inlet valve | ||||
| Excessive pump temperature causing seizure | Dismantle the pump for repair and increase the cooling effect | ||||
| Poor oil quality, resulting in pump seizure due to poor lubrication | Disassemble the pump for repair and oil change | ||||
| Poor oil quality, resulting in blocked oil passages, insufficient oil volume, and poor lubrication. Pump seizure | Disassemble the pump for repair, clean the oil circuit, and change the oil | ||||
| Foreign objects entering the pump chamber | Disassemble the pump to clean foreign objects | ||||
| Voltage too low | Thin power cord | Thickened power cord | |||
| Power supply voltage too low | Reduce the power consumption or boost processing of other devices | ||||
If possible, kindly suggest please your working industry/process, working pressure, working medium, etc. Given detailed request helps to gain better-matched customized solution. Thanks for your patience.
your request will be responsed within 3 hours, kindly pay attention to your email please.
