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Freeze Dryer Vacuum System Common Fault
- Oct 13, 2017 -

1. Freeze Dryer vacuum system vacuum is not high. Cause: Pump temperature is too high, may be the pump valve or cavity scratch wear, rotor shaft displacement caused by single-sided wear. Pump oil problems: oil level is too low, the seal is not strict; oil pollution was yellow; oil level normal, oil barrier, pump cavity did not maintain the appropriate amount of oil. Pump itself leaks: seals, gas needle washers are damaged or not pressed, the exhaust valve is damaged, resulting in poor sealing. The air inlet filter is blocked. Remedy: Reassemble after repair. Refueling; oil change; check the oil and oil valve into the oil. Replace the seal or valve for the specific situation. Remove the cleaning.

2. Freeze dryer vacuum system motor overload operation, abnormal operation of the pump noise, noise, rotation difficult. Cause: Pump temperature is too high, may be the pump valve or cavity scratch wear, rotor shaft displacement caused by single-sided wear. Spring deformation or fracture, so that the rotation of the rotor is not uniform and the impact of sound. The filter is damaged and the broken matter falls into the pump. Pump cavity pollution is serious, parts rust. Pump chamber shaft and sleeve with too tight, resulting in poor lubrication. Remedy: Reassemble after repair, replace the spring, remove the cleaning, oil change, re-assembly, and clear the oil.

3. freeze dryer vacuum system oil spill, fuel injection. Cause: The shaft, oil window, oil hole and other parts of the seal damage or assembly is not correct. The inlet pressure is too high. Excessive fuel, resulting in fuel injection. Exhaust cover below the oil net installed anti, causing fuel injection. Remedy: Replace the seal or reassemble, try to reduce the amount of oil, release part of the oil, reassemble.