Pump-solutions-group Neptune Solenoid-driven Diaphragm Metering Pump AR Manuel d'utilisateur télécharger pdf (Page 19)

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

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 1807-22_PZ総合取説_E.indd 18 2008/02/13 8:50:572008/02/13 8:50:57

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Pump-solutions-group Neptune Solenoid-driven Diaphragm Metering Pump AR Manuel d'utilisateur Page 19

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