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22
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3. Tubing
1. Tubing for types VC, V6, PC, VM, FC
· Mount securely the tube with fitting nut, hose
stopper and fitting spacer referring to the illus-
tration on left.
· Pay attention not to tighten fitting nut exces-
sively.
Caution
· Use specified size of tube. Otherwise tube may
come off. Refer to pump connection table on
page 8 for the size of tube.
· Insert the fitting spacer into tube as deep as
possible. Otherwise liquid may leaks or tube
may come off.
· Pay attention not to lose O ring. If O ring is not
mounted, it may cause liquid leakage or failed
self-priming.
2. Tubing for SH type
· Connections are Rc1/4 or NPT1/4 (EH-E30,
35SH) and Rc3/8 or NPT3/8 (EH-E45, 55SH).
Apply seal tape to connected pipe and securely
tighten it so that liquid can not leak nor air be
sucked in.
3. Tubing for bleeding
· When you do bleeding, return the discharge side
tube to the suction side tank. Remove the check
valve if it is mounted. Refer to “1-1 Bleeding”
on page 29.
Caution
The EH-E pump is not equipped with built-in
air-vent valve. Mount the air-vent valve refer-
ring to the illustration on left.
Built-in type air-vent valve is available as an
option for types VC, V6 and PC.
Hose
Fitting nut
Hose stopper
Fitting spacer
O ring
Fitting nut
Return
to tank
Remove
check valve
Pump
Discharge hose
Three way joint
Check valve
Air vent
valve
