Pump Solutions Group Neptune Solenoid-driven Diaphragm Metering Pump ARPZ-31_61_12 - Manual (Page 22)

21
Installation
Nut
Air-release hose
Return to the tank
or other container.
Air-release joint
Air-release hose
(soft PVC)
Air-release
joint
Nut
■PVC braided hose/PE tube
• Unlike other models, this model has a discharge-side joint at the front side
of the pump head and an air-release joint on its top.
• When bending the hose/tube, provide sufficient leeway in the bending so
that the hose/tube will not break. Also ensure that it will not be rubbed
against or trodden on.
• Insert the hose/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 hose/tube may
become disconnected. After operation has started, tighten up the nuts as
appropriate.
• When tightening the nuts, hold the hose/tube to prevent it from being twist-
ed. The joints and other areas may be loosened by the return force of the
hose/tube.
• The pump comes with a 5-meter long hose/tube for both the discharge side
and suction side. When longer hose/tube is used, the pressure loss may
exceed the pump’s maximum discharge pressure so thicker hose/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 hose/tube size.
• When disconnecting the hose/tube for jobs such as maintenance and then
afterwards re-connecting the same hose/tube, cut about 10 mm off the end
of the hose/tube before re-using them.
Connecting
Model w/ automatic air-release function for injection of sodium hypochlorite: ARPZ-31/61/12
Retaining ring
Nut
Nut
Retaining ring
PE tube
(1/4”×3/8”)
PE tube
PVC braided hose
PVC braided hose
(1/4”×3/8”)
Air-release joint
Discharge-side joint
Pump head
Suction-side joint
■Soft PVC hose (for air release)
(1) Firmly insert the supplied soft PVC air-release hose
as far as the base of the air-release joint on the top
of the pump head.
(2) Firmly tighten up the nut so that the hose will not
become disconnected.
(3) Return the other end of the hose to the tank or other
container.
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