Pump Solutions Group Neptune Solenoid-driven Diaphragm Metering Pump ARPZ-31_61_12 - Manual (Page 19)

18
Installation
PE tube (1/4”×3/8”)
Tube-fitting body
Sleeve
Grip
Nut
Ceramic weight (E)*
Foot valve
⎫
⎬
⎭
PP tube (1/8”×1/4”)
Nut (A)
Grip (B)
Tube-fitting body (D)
Sleeve (C)
Discharge-side joint
a
Pump head
Connecting
Model for injection of boiler chemicals: PZ-31-FEC(PP)
■PP/PE tube
• When bending the tube, provide sufficient leeway in the bending so that the tube will not break. Also ensure that it will
not be rubbed against or trodden on.
• Insert the tube firmly so that it will not become disconnected, and tighten the nuts securely. Do not excessively tighten
the nuts. Doing so may damage or break the joint.
• If the temperature of a liquid or ambient temperature is higher than room temperature, the tightening force will be
reduced, and the tube may become disconnected. After operation has started, tighten up the nuts as appropriate.
• When tightening the nuts, hold the tube to prevent it from being twisted. The joints and other areas may be loosened
by the return force of the tube.
• The pump comes with a 5-meter long tube for both the discharge side and suction side. When longer tube is used, the
pressure loss may exceed the pump’s maximum discharge pressure so thicker tube will be required. Provide details
on the (1) viscosity of the liquid, (2) length of the pipes (how they are positioned) and (3) specific gravity of the liquid
to a TACMINA representative who will select the appropriate tube size.
• When disconnecting the tube for jobs such as maintenance and then afterwards re-connecting the same tube, cut
about 10 mm off the end of the tube before re-using it.
(1) Cut the end of the tube at right angles using a sharp
blade.
(2) Wrap sealing tape around the tube-fitting body (D),
and screw the body into the discharge-side joint
using a tool. (The tube-fitting body is already mount-
ed in place before shipment.)
(3) Pass the tube through the nut (A), grip (B) and
sleeve (C), and insert its end until it touches the
back end of the tube-fitting body (D) on the inside.
(4) Tighten the nut (A) by hand.
(5) Using the tool, tighten the nut (A) in such a way that
the gap (area “a” in the figure) between the tube-
fitting body (D) and nut (A) is approximately 1.5 mm.
✽ Bear in mind that the joint may break if the nut (A)
is tightened too much.
blade
tube
* The tube is packed in the form of a coil. Attach the
ceramic weight (E) and straighten out the tube so that
the liquid inside the tank will be sucked up through it.
07-22_PZ総合取説_E.indd 18 07-22_PZ総合取説_E.indd 18 2008/02/13 8:50:57 2008/02/13 8:50:57