SOP on cleaning of return air riser filters.


To lay down a procedure for cleaning of return air riser filters.


This SOP is applicable for cleaning of return air riser filters.


Production Officers / Executive shall be responsible for follow the procedure mention in this SOP.


Production Head and QA Head shall be accountable for the compliance of SOP.


SOP : Standard Operating Procedure.


All the cleaning and sanitization activity shall be done after the completion of day’s work.

Remove one filter at a time from the polybags.

Wash the pre-filter with purified water from the downstream side of the filter. Repeat washing 3-4 times till there are no remnants of the product in pre-filters. visually inspect that there are no remnants of the product.

Dry the pre-filters using filtered compressed air.

Check the filters for any damage, if damage found inform immediately to Production officer or Engineer to change the filter.

After drying wrap individual filter in fresh poly bags.

Sanitize the outer surface of poly bags.

Mop the grills of the pre-filters & inside the ducts, by alternative wet and dry mopping using 70% IPA solution.

Transfer the cleaned filters to respective area.

Fix The Replaced Set of Pre-Filter in the Respective grill.

Frequency of Filter cleaning shall be once in a month and at the time of product change over.

Enter the cleaning record of pre-filters of return air raisers in return air raiser cleaning record as per Annexure-1.

Forms and Records:

Return Air Raiser Cleaning Record – Annexure – 1


Master copy –  Quality Assurance

Controlled copies- Quality Assurance, Production, Quality Control


Date Revision Number
Reason for Revision
00 New SOP


Return Air Raiser Cleaning Record

Frequency: monthly / product change over                                                                            

Date Room Name Filter No. Cleaned  /


Cleaned by Reason Checked by

Pharma More Jobs and post Please click here

About Pharma Editor

Check Also


PROCESS VALIDATION PROTOCOL  TACROLIMUS CAPSULES Tacrolimus is administered in conjunction with other medications to inhibit …