Causes of liquid hammer in wellhead compressor

Once the compressor is hit by liquid, that is, the "wet stroke" of the compressor, the refrigeration capacity of the system will decrease and abnormal noise will be generated. Causes of liquid hammer:

1. Check whether the solenoid valve fails, causing a large amount of refrigerant to enter the evaporator after shutdown. When restarting, the liquid refrigerant is sucked into the compressor, so the solenoid valve should be repaired or replaced.

2. The opening of the thermal expansion valve is too large. Check whether there is any leakage of refrigerant in thermal expansion valve bulb, whether the adjustment of thermal expansion valve is sensitive, and properly turn down the thermal expansion valve.

3. In addition, when too much refrigerant is poured into the system, liquid hammer will easily occur. Excess refrigerant needs to be discharged before it can be discharged.