Table 4.4

Dry Chemical Cleaners

 

Cleaner

 

 

Description

 

Part Number

Quantity

 

Osmo AD-20

Dry acid-surfactant for cleaning TLC, PA

1155420

8 x 4 lb. pkgs/case

 

 

 

and CA membrane elements.

1155421

45 lb. pail

 

 

 

 

 

1155422

100 lb. key

 

 

 

 

 

1155423

300 lb. drum

 

 

 

 

 

 

 

 

Osmo AK-110

High pH alkaline cleaner for PA membrane

1155416

8 x 4 lb. pkgs/case

 

 

 

elements.

Recommended for situations

1155417

45 lb. pail

 

 

 

where microbial fouling is a problem. DO

1155418

100 lb. key

 

 

 

NOT use on CA membrane elements.

1155419

300 lb. drum

 

 

 

 

 

 

 

 

 

Osmo ET-70

Cleaner

intended to deal with sulfate

1155424

8 x 4 lb. pkgs/case

 

 

 

or iron precipitation fouling. Recommended

1155425

45 lb. pail

 

 

 

for CA and PA membrane elements.

1155426

100 lb. key

 

 

 

 

 

1155427

300 lb. drum

 

 

 

 

 

 

 

 

CLEANING PROCEDURE

STEPS

1.With the RO machine running, open the Clean-In-Place (CIP) permeate valve. After this valve has been opened, close the permeate service valve. Permeate water will flow into the CIP tank. Allow the water to run through the CIP tank and the CIP tank drain valve for a few minutes to ensure the tank is rinsed thoroughly. After a minute or so, close the CIP tank drain valve. The CIP tank should begin to fill with RO permeate. When the CIP tank has filled to the indicated full line, turn the ON/OFF switch on the RO machine to the OFF position.

2.While the machine is OFF, open the CIP inlet valve. Divert the permeate and concentrate streams to the cleaning container for recirculation. Ensure that the pre-filter is clean. A CIP pump (supplied with DLX models only) is recommended to supply feed pressure into the machine.

3.To circulate the cleaning solution through the machine with suction, remove the CIP plug. Use a non-collapsible suction hose or pipe to feed the machine.

NOTE: Do not allow the machine pump to operate without concentrate flow. If pump prime is lost while cleaning on suction, positive inlet pressure is required to reprime. No air should be sucked into the inlet line during suction cleaning.

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