on the other hand, stocking compressor parts is very expensive because there are many useless parts when preparing 2 or 5 years of spare parts. . Also, in the oil and gas regions, specific climates may increase the cost of inventory of parts in the storage.

. Kit parts and service manual O&M planned with the lowest cost and highest productivity in multiple periods as follows:

- Daily or one-month services

- 6 Monthly services

- 24 monthly overhaul services

- Six annual primary overhaul services for up to 24 years and special kits for each period