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 for ice blockage is that the system contains too much moisture (moisture), the way to generate moisture are:

1) In the installation of the system vacuum time is not enough, failed to exhaust the moisture inside the pipe. Pipe connection at the welding process is not good, there is leakage point.

2) The air in the connecting hose is not blown out of the hose when filling the system with refrigerant.

3) When the system is replenished with oil, enter the air.

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Car Polish

Car polishing refers to polishing the car before waxing, sealing or coating during car beauty. In the Car Cleaning and car washing industry, Car Wax and car polish are often used alternately. For ordinary people who want to polish their cars, it may be an expensive mistake not to distinguish between car wax and car polish. Polishing is a paint correction process to remove the defects on the surface of your car, while waxing is to lay a protective coating on the paint of the car as a detailed finish.

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