PURPOSE:
To provide the detailed procedure of filter cleaning of Hot Air Units and cleaning of Broken Bag Detection sensor of Fluidized Bed Equipment.

SCOPE:
10 µ and 5 µ filters of Hot air unit of Fluidized Bed Equipment and Coating machines and Broken Bag 
Detection sensor of Fluidized Bed Equipment.

RESPONSIBILITY:
Engineering Department.

DEFINITION: Not Applicable.

1.0 ENVIRONMENT HEALTH AND SAFETY:

1.1	Ensure that Hot Air Unit is electrically isolated.

1.2	Use rubber or nitrile hand gloves.

1.3	Person doing filter cleaning should use PPE's like head gear, goggles and dust mask.

1.4	Do not touch powder with bare hands.

1.5	The filter cleaning to be done in specified area only.

1.6	Use separate poly bag for carrying uncleaned and cleaned filters.

2.0	PROCEDURE:

2.1	HOT AIR UNIT FILTER CLEANING:

2.1.1	Switch ‘OFF’ the HOT AIR UNIT system and put "Under Maintenance" board on the HOT AIR  
UNIT switches.

2.1.2	Open the cover plates of filter housing.

2.1.3	Remove the filters from the housing.

2.1.4	Put back the cover plates.

2.1.5	Cover the filters in poly bag and take them in filter cleaning booth.

2.1.6	Clean the filter as per SOP.

2.1.7	Put the filter in clean poly bag and carry it back to the respective HOT AIR UNIT.

2.1.8	Remove cover plates.

2.1.9	Before fixing the filter, clean the inlet / exhaust filter plenum from inside using dry duster.

2.1.10	Remove the filter from the poly bag and fix it back in its position in the Plenum and ensure that there 
is  no gap between filter and frame.

2.1.11	Put back the cover plates.

2.1.12	Remove under maintenance board.

2.1.13	Record the filter cleaning activities. (Annexure 1).

Note: The quantity of powder recovered from the exhaust filter of Hot Air Unit to be weighed and the same to be recorded in the Annexure 1.

2.2	BROKEN BAG DETECTION (BBD) SENSOR CLEANING OF FLUID BED EQUIPMENT  
(FBE):

2.2.1	Take out the BBD sensor from the exhaust duct of FBE.
2.2.2	Clean the BBD sensor with clean dry cloth.
2.2.3	Fix it back in its position.
2.2.4	Record the BBD sensor cleaning activities. (Annexure 2)
Note: Cleaning of BBD sensor to be done during filter cleaning, batch changeover and whenever required.

3.0	ABBREVIATIONS:

µ			:	Micron.
SOP			:	Standard Operating Procedure.
No.			:	Number.
PPE			:	Personal Protective Equipment.
4.0	REFERENCES:

	:	SOP for filter cleaning booth operation.

5.0	ANNEXURES:

Annexure Number	Annexure Name	To be used as	
Annexure 1	Filter cleaning of Record Hot Air Units. 	Bound Book	
Annexure 2	Broken Bag Detection Sensor Cleaning Record of Fluid Bed Equipment 	Bound Book	

		:	

ANNEXURE 1
FILTER CLEANING RECORD OF HOT AIR UNIT

Frequency: Weekly

S.No.	Equipment Code	Filter Description	Filter Code	Cleaning Status	Powder Weight (Exhaust Filter)
(kg)	

						

						

						

Done By:						                                               Checked By:

Note: The quantity of powder recovered from the exhaust filter of Hot Air Unit to be weighed if applicable.

ANNEXURE 2
		  
BROKEN BAG DETECTION SENSOR CLEANING RECORD OF FLUID BED EQUIPMENT

Equipment Code: _____________________	

Location: ____________________________	

S.No.	Cleaning Done Date	Done By	Checked By	Remarks