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Before attaching the delivery hose to the plant, prime the metering pump by going through the sequence
shown in Fig. 7. In case of priming difficulties, use a normal syringe to suck liquid from the discharge nip-
ple while the pump is in operation, continuing until you actually see the liquid rise in the syringe. Use a short
length of suction hose to connect the syringe to the discharge nipple.
e. - Try to keep both the suction and discharge hose as straight as possible, avoiding all unnecessary bends.
f. - Select the most appropriate injection point on a pipe of the plant to be treated and there fit a 3/8" female steel
gas thread connector (similar to BSPm). This connector is not supplied with the pump. Screw the injection
valve to the gas connector, inserting a gasket as shown in Fig. 8. Then connect the discharge hose to the
conical connector on the injection valve and fix it with the supplied tube nut G. The injection valve also acts
as no return valve.
3.1 - INJECTION VALVE INSTALLATION DIAGRAM Fig. 8
A - Pipework
B - Valve guide
C - Polypropylene nipple
D - Lip valve
E - 3/8" Double threaded pump head nipple
G - Hose tube nut
M - Conical connector for attaching the discharge hose
N - 3/8" female steel gas thread connector
T - Polyethylene hose
Fig. 8
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17
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Fig. 7
A
N
E
D
B
C
M
G
T
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