How to Schedule Overhauls, Medium - sized and Minor Repairs of Screw Refrigeration Compressors?

The maintenance period of the screw compressor unit is related to many factors. The following information is for reference.
(1) The motor of the screw compressor: Disassembly, maintenance, and replacement of parts, lubrication of bearings. The period is 2 years.

Refer to the motor operation manual.
(2) Coupling: Check the coaxiality of the compressor and the motor (check whether the elastic drive plates are damaged or the rubber pins are worn). The period is 3 - 6 months.
(3) Oil separator: Clean the interior. The period is 2 years.
(4) Oil cooler: Remove scale (for water - cooled) and oil dirt. The period is half a year, depending on the water quality and dirt conditions.
(5) Oil pump: Check for leaks and conduct maintenance. The period is 1 year.

(6) Oil filters (including the coarse oil filter) and suction filters: Clean. The period is half a year. They should be cleaned 100 - 150 hours after the first start - up.
(7) Oil pressure regulating valve: Check the regulating capacity. The period is 1 year.
(8) Slide valve: Check the operation. The period is 3 - 6 months.
(9) Safety valves, pressure gauges, and thermometers: Calibrate. The period is 1 year.
(10) Check valves, suction and discharge stop valves, and pressure gauge valves: Conduct maintenance. The period is 2 years.
(11) Pressure relays and temperature relays: Calibrate. The period is about half a year. Refer to the manual.
(12) Electrical equipment: Check the operation. The period is about 3 months. Refer to the manual.
(13) Automatic protection and automatic control systems: The period is about 3 months.