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Installation
4. Tubing
1) Tape the air bleeding union
(Attached to the pump) and screw it
in the pump head.
2) Have the piping short and less
bends as much as possible to reduce
flow resistance.
3) The fitting bore is Rc1/4 female
thread. Be sure to connect each
connection on both suction/dis-
charge piping to eliminate liquid/
air leakage.
4) Piping for air elimination.
Be sure to return the end of hose to
a tank or container after connect-
ing a hose to the bleed port.
Caution
Regarding the SH type, discharge
pressure can not be fully opened
by the adjusting screw. Install a
discharge valve on discharge pipe
for opening pressure.
Fig.C
5m
Suction side tank
Discharge side tank
Bleed port
5) Mounting check valve
A check valve is packed to
avoid over feeding. Be sure to
install the check valve in fol-
lowing condition.
a. Suction side liquid level is
higher than discharge side
liquid level. (See Fig. A)
Injection point is below
suction side liquid level at
atmospheric pressure.
b. Suction side pressure is
higher than that of injection
point. (See Fig. B.)
c. Difference of liquid level in
height is 5 meters or less,
even if discharge side liquid
level is higher than suction
side. (See Fig. C.)
Caution
Periodically wash or replace
the check valve with new one
because it may be clogged by
crystal.
Check valve
OUT
IN
Suction side tank
Fig.A
Discharge side tank
Fig.B
Discharge
Suction
Return the end
tube to a tank.
Adjusting screw