SOP of Operation and backwash of Multi grade filter

SOP of Operation and backwash of Multigrade filter

  • Objective
    • To lay down the procedure for operation and backwash of Multigrade filter.

 Scope

This SOP is applicable for operation and backwash of Multigrade filter.to formulation plant of Pharmaceutical Company.

  • Responsibility
    • Technician/above –Eng. is responsible for operation and backwash of Multi grade filter.
  • Accountability
    • Department Head & QA Head shall be accountable for implementation of this SOP.
  • Abbreviations and Definitions

Initiator Department       :           Department who shall initiate the preparation or revision of

SOP.

QA                              :            Quality Assurance

No.                              :            Number

Kg/cm2                       :           Kilogram per centimeter square.

  • Procedure
    • Ensure that raw water pumps are in running position and inlet valve and          discharge valve are in open condition.
    • Open the inlet valve and air release valve, when all the air is removed, close the air release valve.
    • Open the rinse outlet valve and allow the water to drain.
    • Rinse the water for 5 minutes & check the water quality, if ok open the service outlet valve.
    • The unit will come into service.
    • Check the inlet and outlet pressure across the filter; differential pressure shall not be more than 0.35 kg / cm2.
  • Following steps shall be followed for stopping the Multi Grade Filter:
    • Put the pretreatment in off mode.
    • Close the service inlet valve  and service outlet valve .
    • Open the air release valve to depressurize the unit.

 Backwash :

    • Ensure that raw water pumps are in running position and inlet valve and discharge valve are in open condition.
    • Close the MGF inlet valve and outlet valve.
    • Open the backwash outlet valve fully.
    • Open the backwash inlet valve.
    • Ensure that the filter media is not being lost to drain; if slight media loss is observed, reduce the backwash flow by throttling the valve.
    • After specified duration of 10 minutes or when the water in the drain sump is clear, close the backwash outlet valve and open the air release valve.
    • When all the air is expelled from the unit, close the backwash inlet valve and air release valve.
  • Rinse:
    • Open the inlet valve and drain valve.
    • When the water in the drain sump is clear, close the drain valve.
    • Open and adjust the outlet valve to get the desired flow to service.
    • Check that differential pressure across the filter shall not be more than 0.35 kg/cm2.
    • Frequency of backwash shall be maintained daily except holidays
    • Record all the parameters as per Annexure.
  • List of format / annexure:
S.

No.

Format Title Annexure

Number

Format

Number

1 Daily Log Sheet for Pre-treatment plant
  • Distribution
    • Master copy       –       Quality Assurance
    • Controlled copies –        Quality Assurance, Production, Quality Control, Stores, Engineering and Human Resource
  • History:
Date Revision Number
Reason for Revision

 

 

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