Users who use ultra-low temperature chillers will encounter some problems when they are not used for a long time, such as poor cooling performance and loud sound. These problems are more common, but some refrigeration systems need to be well understood.
Normally, in order to ensure the normal use of the cryogenic refrigerator, we will perform derusting and sewage disposal before installation. But even this will prevent some dirt such as welding slag, iron filings, and sand from remaining inside the system. Therefore, in order to prevent dirt from being damaged to some original parts such as a compressor, the problem of system piping blockage is avoided. The refrigeration system must be drained after installation.
Drainage work can be divided into pipe group, room unit, system layering or segmental sewage disposal. The general principle is that the dirt is blown clean without damaging the valves and other components.
In order to check whether the coil of the cryogenic refrigerator is clogged, a ball test can be performed. The diameter of the wooden ball used in the test should be smaller than the inner diameter of the pipe and larger than the radius of the pipe. The air in the gas tank can be blown in, and the flow is required to be unimpeded.
In the work of sewage discharge of the ultra-low temperature chiller, if it is found that the pipeline and the valve have obvious air leakage points, it is necessary to weld the welding or tighten the flange of the relevant valve in time. Avoid or minimize the valve to prevent dirt from damaging the seal line of the valve.
After the sewage discharge is completed: Remove the valve core and filter of all valves (except the safety valve). If the seal wire on the alloy or seat of the valve plug is found to be damaged, repair it and re-cast the alloy in severe cases. The steel spool or seat seal line is damaged and can be repaired by grinding.
I believe that everyone has seen the sewage technology of the cryogenic refrigerator system, we will definitely understand this maintenance and help you to use it better.