TORAY MBR
Instruction Manual
06-G-MB2-NHPAF-220801
44 of 63
VIII. MAINTENANCE OF “NHPA SERIES”
1. Maintenance Items and Maintenance Frequency
It is recommended that the following maintenance tasks be performed on a regular basis to
maintain optimal performance of the “NHPA Series” module.
(1)
Clean the air diffusers (if uneven diffusion is detected.)
(2)
Perform a chemical cleaning if the currently recorded TMP increases by 5 kPa
(50 mbar) from the initially recorded TMP (assuming the filtrate flow rate is the
same value) or every six (6) months, whichever comes first.
(3)
Replace filtrate connection tubes connected to the filtrate manifold when they
show some deterioration.
(4)
Replace membrane cassettes or element blocks if, after chemical cleaning,
filtrate flow or quality cannot be restored.
(5)
Replace air diffusers when extraordinary uneven diffusion is detected even after
cleaning.
Be sure to use Toray approved replacement parts.
Contact Toray sales department to obtain information on how to
order Toray approved replacement parts.
Make certain the tube is securely attached to the membrane
element nozzle when replacing the individual filtrate tubes to the
filtrate manifold.
Do not apply excessive force to the nozzle or membrane element
when replacing filtrate tubes. Excessive force may result in
membrane element/manifold damage.
Once a filtrate tube has been removed or disconnected from either
the element nozzle or filtrate manifold, it should be replaced with a
Toray approved replacement part. Old filtrate tubes lose their
elasticity, and the integrity of the seal can be compromised.
Note that element replacement is admissible only after instruction
from Toray service staff or their trained affiliate personnel.
CAUTION
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CAUTION
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CAUTION
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CAUTION
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CAUTION
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CAUTION
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