Pump Solutions Group PZiG Series - Manual (Page 10)

9
Installation
• Insert hoses sufficiently and firmly tighten hose nuts to prevent hoses from
becoming disconnected. Do not tighten them with a tool using excessive
force. Doing so might damage the hose.
• When liquid temperature or ambient environmental temperature is higher
than room temperature, hoses may become disconnected. Re-tighten nuts
as required after pump operation is started.
• When tightening the hose nut, hold the hose firmly to prevent it from twist-
ing. The return force of the hose sometimes causes the tightening section
to become loose.
Piping
Hose Connections
Hose nut
Retaining ring
12 ✕ 18 mm dia. hose
An anti siphonal check valve is provided with this pump. Use this anti siphonal check valve as long as it does obstruct
operation (except for high-viscosity chemicals). Be sure to install the anti siphonal check valve in the following
instances.
• When the injection point is open to air and chemicals are injected at a position lower then the level of chemicals in
the chemical tank (to prevent siphoning)
• When injecting chemicals to the suction-side piping of a centrifugal pump, for example
• When a lot of chemicals exceeding the rated discharge volume are transferred (to prevent overfeeding)
• Overfeeding may occur if piping is too long even on the ascending piping.
Anti Siphonal Check Valve
Gripping section
Hose nut
When installing the hose with
the anti siphonal check valve
attached to the main piping,
be sure to turn the hose nut
by holding the gripping
section.
If you turn the hose nut
without holding the gripping
section, the screw section on
the nozzle side may become
damaged.
POINT
When the injection
nozzle is too long
compared with the
piping aperture, cut
the dotted section in
the figure before use.
We recommend installing
the anti siphonal check
valve via a valve, for
example, for maintenance.
Provide an Rc1/2 or Rc3/8
female screw and screw in.
Use a valve made of a
material that is resistant to
the chemicals to be used.
When injecting chemicals into slender piping,
cut the tip of the injection nozzle as required
before use.
Cut the tip so that it is positioned at the center of the
piping into which chemicals are to be injected.
Valve
Injection point
(Rc1/2 or Rc3/8)
Main piping
●Installing the anti siphonal check valve
(VTCE/VTCF)
* In the case of FTCT, though the shape differs the pro-
cedure is almost the same.
1Provide an Rc3/8, 1/2 female screw at the injec-
tion point.
The R1/2 or R3/8 male screw on the anti siphonal
check valve is already cut.
2Wrap sealing tape around the male screw of the
anti siphonal check valve and screw the screw
into the injection point.
If it is difficult to screw in the screw, grip the gripping
section of the nozzle with pliers or a similar tool, and
re-tighten lightly.
05-45_PZiG Series(2)English 06.8.4 9:39 AM y [ W 9