User Manual

Installation

Injection point

(Rc1/2)

Main pipe

Nozzle grip

Nut

Duck-bill cap

✽

Do not remove this.

■Anti-siphon check valve w/ duck-bill cap

This pump is provided with an anti-siphon check valve with duck-bill cap. Use this valve at the injection point unless

there is a good reason not to do so. Be absolutely sure to install it in the following cases.

• When the injection point is open to the atmosphere and liquid is to be injected at a position lower than the level of the

liquid in the tank (prevention of siphoning)

• When the liquid is to be injected inside the suction-side pipe of a volute pump, etc.

• When chemicals greatly exceeding the pump’s rated discharge volume are being fed (prevention of overfeed)

✽ Even with a rising pipe, overfeed may occur if the pipe is too long.

Connecting

(1) The anti-siphon check valve with duck-bill cap has an R1/2 external

thread. Provide an Rc1/2 internal thread at the injection point.

(2) Wind sealing tape around the external thread of the anti-siphon check

valve with duck-bill cap, and screw the valve into the injection point.

✽ If it is hard to screw the valve in, grasp the nozzle grip using a tool

such as pliers, and tighten the valve gently.

✽ When connecting the tube with the anti-siphon check valve with duck-

bill cap already mounted on it to the main pipe, be absolutely sure to

hold the valve body and turn the nut. If the nut is turned without hold-

ing the body, the threaded part on the nozzle may be damaged.

NOTE

It is recommended that the tube be attached to the main pipe through a

valve to enable the anti-siphon check valve with duck-bill cap to be replaced

or cleaned, etc.

✽ Use a valve made of materials which will resist any corrosion resulting

from the chemicals used.

Valve

Anti-siphon

check valve

with duck-bill cap