Pump Solutions Group Neptune Solenoid-driven Diaphragm Metering Pump ARPZ-31_61_12 - Manual (Page 15)

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Installation
Nut
Retaining ring
PVC braided hose
PVC braided hose
(1/4”×3/8”)
Nut
Retaining ring
PE tube
PE tube
(1/4”×3/8”)
The connection procedure will be described by pump type.
Connecting
Model for injection of general chemicals: PZ-31/61/12-VEC/VFC
■PVC braided hose/PE tube
• When bending the hose/tube, provide sufficient leeway in the bending so that the hose/tube will not break. Also en-
sure 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 re-
duced, 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 twisted. The joints and other areas may be loos-
ened 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 grav-
ity 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.
Model Liquid-end material Hose/tube Page
Model for injection of general chemicals
PZ-31/61/12-VEC/VFC
Discharge side : PE tube
Suction side : PVC braided hose
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PZ-31/61/12-FEC/FFC PE tube
16
PZ-31/61/12-FTC FEP tube
Model for injection of boiler chemicals PZ-31-FEC (PP)
Discharge side : PP tube
Suction side : PE tube
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Model for injection of sodium hypochlorite PZ-31/61/12-CL
Discharge side : PE tube
Suction side : PVC braided hose
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Model w/ automatic air-release function
for injection of sodium hypochlorite
ARPZ-31/61/12
Discharge side : PE tube
Suction side : PVC braided hose
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