1. OBJECTIVE             

1.1       To lay down a procedure for Preventive Maintenance of Air compressor & Dryer  

2.     RESPONSIBILITY                                                  

• Assistant    Engineering  – To Follow the SOP

• Executive   Engineering – To comply the SOP

3.     PROCEDURE                       

• 3.1 WEEKLY MAINTENANCE

•  Clean the air intake filter with compressed air

• Check and ensure the air compressor load is below 20 Amps during unloading and below 50 Amps during loading.

• Check and ensure no air leakages in the system.

• Check the condition of belts.

• Check and ensure the automatic drain valve function

• Check and ensure the by-pass valve of dryer  in closed condition

• Check and ensure the function of the Dryer

• 3.2 MONTHLY MAINTENANCE

• Check and tighten the motor Bed Bolts.

• Clean the contactor kits with carbon tetra chloride.

• Open the motor terminal covers and tighten the terminals, replace terminal strip if terminals are broken.

• Clean the control panel with air blower and ensure no control wires should hang, tag the wires with cable tag if it is hanging.

• Check the oil level in air compressor, fill with oil if it is below the level.

• Check for any leakages in the pipe lines connected to dryer and receiver.

• Clean the automotive drain valve strainer

• 3.3 QUARTERLY MAINTENANCE

• Check  the alignment of the motor pulley and compressor pulley.

• Regrease the motor Bearings.

• Clean the inlet  discharge valves and replace if worn out or damaged.

• Open and clean the main, exhaust, non return, automatic drain  and solenoid valves.

• Check the Air suction and Discharge valves for worn-out  Parts, replace if required.

• Replace the Compressor  cartridge oil filter.

• Clean the oil strainer and oil cooler.

• Clean the heat exchanger tube bundle assembly.

•  Replaced  the suction filter element

 3.4  HALF YEARLY MAINTENANCE

• Check and clean the contactors, replace the contactor kits if it is damaged.

• Air inlet filter element to be replaced.

• Clean all the filter elements of dryer

• Replace the oil in the air compressor

• 3.5 YEARLY MAINTENANCE

• Check and ensure cylinder and cylinder heads are ok.
• Check and ensure no vibration of driven pulley.
• Check and ensure piston and packing rings are ok
• Replace all elements of dryer once in a year
• Check the physical condition of alumina, replace if required.
• After cooler (Water Cooled)De-Scaling shall be done once in  year

4.  ABBREVIATIONS

Nil

5.         REFERENCES

Nil      

6.         ANNEXURES

6.1       Annexure – 1               List of Air Compressor.

6.2       Annexure – 2               Weekly Preventive Maintenance Check list

6.3       Annexure – 3               Monthly Preventive Maintenance Check list

6.4       Annexure – 4               Quarterly Preventive Maintenance Check list.

6.5       Annexure – 5               Half yearly Preventive Maintenance Check list.

6.6       Annexure – 6               Yearly Preventive Maintenance Check list.

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