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 |