1.0) OBJECTIVE:

To describe a procedure for the Preventive Maintenance of Screw Air Compressors.

 2.0) SCOPE:

This SOP is applicable for preventive maintenance of Screw Air Compressor

 3.0) RESPONSIBILITY:

Assistant Engineer/Above shall be responsible for implementation and compliance of the SOP.

4.0) ACCOUNTABILITY:

Manager – Engineering/Manager-Production/Head-QA shall be accountable for implementation and compliance of the SOP.

5.0) ATTACHMENTS:

Preventive Maintenance Checklist of Screw Air Compressor                -Attachment-I

6.0)            PROCEDURE:

• • Preparation of preventive maintenance plan:
    • Inform the concern person before starting preventive maintenance.
    • Ensure that no activities are carried out in the respective machine.
    • Ensure that the respective system electrical supply is switched “OFF”
    • Before carrying out the preventive maintenance display status board as “UNDER PREVENTIVE MAINTENANCE” on the electrical panel and machine.
  • FREQUENCY:
    • Quarterly
  • CHECKLIST:
    • Check and tight all the exposed nut and bolts of the unit.
    • Check and tight all the foundation bolts of the motor and compressor.
    • Check the lubricating oil level, if required top up the oil.
    • Clean the suction air filter and oil filter.
    • Check the tightness of all the terminals of electrical supply , PLC, and Drive.
    • Clean and inspect compressor suction and discharge valves for any leakages.
    • Clean and inspect compressor pipe line for any leakages in flange gaskets.
    • Check the V-belt condition and its tension.
    • Check pulley locking bolts of motor and compressor.
    • Check the thermostat valve for proper working.
    • Check the pressure gauges for its proper working.
    • Start and run the machine in Auto/ Manual mode.
    • Check for any abnormal noise in the machine.
  • Remove the “UNDER PREVENTIVE MAINTENANCE” status board from the machine and the respective electrical panel.
  • Affix the Preventive Maintenance Status on machine as per Attachment – I of SOP/EN/003
  • Update the status label of the machine after the completion of preventive maintenance and assembly respectively.
  • Junior Engineer/ above shall update the activity in respective format of SOP for Calibration Preventive Maintenance of Reciprocating Air Compressors (SOP/EN/024).

       REFERENCES:

             In-house

 ABBREVIATIONS:

SOP : Standard Operating Procedure

Engg.: Engineering

• DISTRIBUTION LIST:

Quality Assurance

Production

Engineering

10.0     HISTORY OF REVISION:

Version No.	Effective Date	Reason for Revision

Attachment-I

        Preventive Maintenance Checklist of Screw Air Compressor

Area:

ID No:                                                                                                                                            Date:

Frequency:

 

Sr. No.	Particulars	Status
	Check and tight all the exposed nut and bolts of the unit.
	Check and tight all the foundation bolts of the motor and compressor.
	Check the lubricating oil level, if required top up the oil.
	Clean the suction air filter and oil filter.
	Check the tightness of all the terminals of electrical supply , PLC, and Drive.
	Clean and inspect compressor suction and discharge valves for  any leakages.
	Clean and inspect compressor pipe line for any leakages in flange gaskets.
	Check the V-belt condition and its tension.
	Check pulley locking bolts of motor and compressor.
	Check the thermostat valve for proper working.
	Check the pressure gauges for its proper working.