Reasons for high high and low pressures of the refrigerant in a cold dryer
Thread Content
In one of our company’s water-cooled refrigeration dryers, both the high and low pressures of the refrigerant are on the high side: the low pressure is 0.62 MPa, while the high pressure ranges from 2.2 to 2.6 MPA (with a protection mechanism triggered at 2.6 MPA). The condenser has been cleaned, and the bypass valve has also been adjusted. The pressure of the R22 refrigerant is normal (0.7 MPA after shutdown). What could be the cause?
Remove the inlet filter and try again
Do you mean the filter for the refrigerant? We stopped the cold dryer today. Some time after it was shut down, the high pressure was at 1.5 MPa and the low pressure at 1.2 MPa. Could air have gotten in? (Yesterday, we made a mistake while removing the bypass valve; a little refrigerant leaked out, but it was quickly reinstalled.)
Waiting for an expert to answer; learning a bit