Vacuum pump working principle

Vacuum pumps can basically be divided into two types, namely gas capture pumps and gas transfer pumps. It is widely used in metallurgy, chemical, food, electronic coating and other industries. With the development of vacuum applications, the types of vacuum pumps have been developed in many

Thermal expansion valve plugging causes

Thermal expansion valves in refrigeration systems are often blocked, including "dirty" and "ice-blocked." The main reason for the dirty blockage is the presence of impurities in the system, such as welding slag, copper scrap, scrap iron, fibers and the like. The reason