1. OBJECTIVE

       To lay down a operation procedure of Air compressor and Dryer.

2.     RESPONSIBILITY

• Assistant  – Engineering  –  To Follow the SOP

• Executive – Engineering – To Comply the SOP

3.    PROCEDURE

       3.1   PRECAUTIONS

• Ensure that air outlet valves of Air compressor and air inlet valve of drier are in open condition.

• Keep ready air compressor and dryer.

• Do not open the by pass valve when the dryer is in operation.

• Do not adjust or tamper the safety devices.

      3.2 PRE START UP

• Drain Condensed water from heat exchangers

• Check for proper valve position of after cooler, air receiver and air drier

• Keep discharge valve open condition before starting the compressor

3.3   OPERATION

• Start the Air compressor by following the instructions displayed on MMI  of the PLC  
• Drain all low points in compressor suction and discharge lines.

• Drain condensate water from air receiver, pulsation bottles and moisture separators.

• Switch on the dryer towers

• Drain the water from pre, after and oil removing filters

• Check and ensure there should not be any abnormal noise from the compressor

• Record the operating parameters in Annexure-1 for every one hour

NOTE : OPERATING PARAMETER LIMITS

• Lubrication Oil Pressure :        1.1 to 2.8 kg/cm
• Interstage Air Pressure    :        2.0 to 3.5 kg/cm
• Discharge Air Pressure    :        8.5 to 10 kg/cm
• Load in Amps                  :       50

  3.4  SHUT DOWN

• Switch off the power supply to the motor through the on-off switch on the starter cum control panel. The air compressor automatically unloads before stopping.

• Switch off the supply for dryer towers

• Drain the water from pre, after and oil removing filters

• Close the outlet valve

4.         ABBREVIATIONS

MMI :   Main Machine Interface

PLC :    Programmable Logic Controller

5.         REFERENCES

Nil      

6.         ANNEXURES

6.1       Annexure- 1 -Daily log sheet of Air Compressor & Drier.

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