30
feed pump at the same time as running of the backwash pump.
- Do not impose the higher pressure to the element
than, the maximum applicable trans-membrane
pressure for backwashing, 200 kPa.
- Do not operate the element at higher temperature
than the maximum applicable temperature, 40
degree C. The higher temperature damages the
element.
(4) At the same time, open the air-scrubbing valve (V-5) for air-scrubbing.
- The air flow rate for air-scrubbing should be within
the range below. Excessive air flow rate may
damage the membranes.
HSU-1515: 1.5 – 3.0 Nm
3
/h
(5) After backwashing with air-scrubbing for a fixed time (normally 60 seconds),
close the air scrubbing valve (V-5), stop the chemical feed pump (if used) and
the backwash pump and close the chemical feed valve (V-7) and the backwash
valve (V-4).
(6) Open the drainage valve (V-3).
(7) Close the drainage valve (V-3) after backwashed water is drained out from the
submerged tank.
(8) Open the feed water valve (V-1).
(9) After making sure the water level of the submerged tank is higher than the top
of the filtrate piping, close the feed water valve (V-1).
!
CAUTION
!
CAUTION
!
CAUTION
!
CAUTION
Summary of Contents for HSU-1515
Page 20: ...18 2 Configuration Rack Model R16 ...
Page 21: ...19 Rack Model R08 ...
