Mitsubishi STERAPORE 5700 Series Instruction Manual page 23

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Releasing Air From Pipes for Maintenance and Recovery Cleaning
 If air remains in pipes for cleaning, air lock can occur during chemical cleaning, preventing chemical
solutions from being distributed throughout the hollow fiber membrane. Be sure to release air from
the cleaning line.
RE F ER E NC E
 With permanent piping, in general once air is released (e.g. during commissioning), it is not
necessary to release air from piping each time cleaning is performed. Release air from the
cleaning line by running the chemical and dilution water pumps while the permeate pump is
running.
 In a small modules, if chemical solution is fed by using temporary tanks and hoses using a pump or
a difference in water level Figure 3-3, release air from the hose connecting valve B and valve C
before connecting it to the membrane tank. If the hose is connected to the valve on the module side
(valve A) after opening it, liquid in pipes will drain down and cause air to flow in. Therefore, open the
valve on the module side (valve A) after connecting the hose to it.
Adjust the flow rate by adjusting how open the valves are.
Figure 3-3 Schematic Diagram of Chemical Cleaning Equipment Using Temporary Tanks and Pipes
STERAPORE 5700 Series (FF) Instruction Manual
Chapter 3 Chemical Cleaning
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