Pump-solutions-group Neptune Solenoid-driven Diaphragm Metering Pump AR Manuel d'utilisateur télécharger pdf (Page 13)

Installation

Piping

Model for injection of sodium hypochlorite: PZ-31/61/12-CL

IMPORTANT

• It is recommended that a washing water line be provided in the piping.

(A 3-way valve for releasing abnormally high pressure levels may be used instead.)

•

Take steps to use up the sodium hypochlorite in as short a period as possible (10 to 20 days in hot weather).

• When diluting sodium hypochlorite, use (1) pure water (purified water), (2) water that has been passed

through a water softener or (3) city water that has been purified.

Relief pipe

Relief valve

Anti-siphon

check valve

w/ duck-bill cap

Air-release hose

3-way valve

3-way joint

Main pipe

Tank

Discharge-

side pipe

Metering

pump

Suction valve

Draining of washing water

Suction-side pipe

(downward gradient)

Installation is described with an example using PZ-31-CL and TACMINA tank.

• It is extremely dangerous for the user to forget to open the valve or for there to be the clogging of foreign matter inside

the pump’s discharge-side pipe. Be absolutely sure to install a relief valve, which will automatically release abnormally

high pressure levels, on the discharge-side pipe.

• Install a valve for releasing abnormal pressure that has built up inside the discharge-side pipe. The 3-way valve on the

washing water line may be used instead.

• To prevent gas lock and other such types of trouble, be absolutely sure to use the pump with a push-in pipe (when the

pump is to be placed lower than the tank).

• In order to prevent gas lock caused by gases generated and building up inside the pipes, make the pipe connections

as short as possible.

■ When installing the pump

below the tank

✽ Do not install the pump above the tank.

(1)

Connect the suction valve of the tank and the suction-

side joint of the pump using the hose. When doing

this, tilt the pipe at a downward gradient so that no air

will be trapped inside the pipe.

(2) Connect the tube to the discharge-side joint of the

pump.

(3) Attach a 3-way joint to the discharge-side tube (near

the pump’s discharge-side joint), and install a relief

valve. Return the end of the relief pipe to the tank or

other container.

(4) Connect the end of the other discharge-side tube

extending from the 3-way joint to the main pipe

(injection point). When doing this, attach the anti-

siphon check valve with duck-bill cap at the injec-

tion-point side end of the tube.

(5) Attach one end of the air-release hose to the air-

release port, and return the other end to the tank or

other container.

✽ If it is unavoidable for the pump to be placed higher

than the tank, be absolutely sure to connect the foot

valve supplied to the end of the suction-side hose

to ensure that no dirt or foreign matter will be mixed

inside the pump head or valve seat.

✽ It is also recommended that a valve, meter, etc. be

installed to make it easy to carry out maintenance

and other such jobs.

Metering pump

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Pump-solutions-group Neptune Solenoid-driven Diaphragm Metering Pump AR Manuel d'utilisateur Page 13

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