SOP on Cleaning of Filter Press

SOP on Cleaning of Filter Press



Objective : To describe cleaning procedure for filter press.


Scope : To ensure that the equipment is clean and free from any starting materials of previous batch or product residues.


Responsibility : 1.It  is the responsibility of operating staff to clean the equipment.

2. Production Chemist to ensure that procedure is followed.


Materials & Equipment :

1.      Cleaning agent: Teepol or liquid soap.

2.      Mops / brush / lint free cloth




(1)                    Close the outlet valve of the holding tank, detached the connecting pipes taking care to ensure that any liquid in the line is emptied into the holding tank.

(2)                    Drain out the holding tank for left overs.

(3)                    Add 25 liters of boiled tap water to the holding tank and start the filter press so that this enables the filter press to be rinsed with the water and drain the washings.

(4)                    The assembly is dismantled, filter pads are removed and keep them in a plastic tub containing 10 liters of boiled tap water. Also clean the filter sieves, plates and pipelines with boiled tap water for 15 minutes.

(5)                    Prepare a Teepol solution (10ml à 10 liters water) or liquid-soap (50gm à 5 liters water) and clean the surfaces of all the dismantled parts with the help of a nylon brush or mopping.

(6)                    Wash the filter pads and other parts of the filter press by running tap water for 30 minutes and drain the washings. Repeat the procedure for another 15 minutes.

(7)                    Wash the filter pads and other parts of the filter press with 15 liters of purified water and drain the washings. 

(8)                    Finally rinse the filter pads and other parts of the filter press with previously boiled purified water and drain it completely.

(9)                    Send the wash water for analysis for residual active ingredients of previous product.

(10)                Let all the machine parts and pads dry in air, reassemble in the reverse order of dismantling and put a label “Cleaned” or “Ready for use”.




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