Milnor 30015V7J Service Manual page 23

Avoiding Damage From Allied Remote Chemical Delivery Systems
Dribbling From Chemical Supply Line Into Machine
Figure 3:
(assumes positive closure at the pump)
D. Portion of supply line, the contents of which can dribble into the machine
Pump
P.
T. Chemical tank
Design and Installation Recommendations
3.
It is the responsibility of the chemical system manufacturer and supplier to use whatever
measures are necessary to ensure that their system is safe for personnel and equipment. The
following are some of the possible methods the manufacturer or supplier may wish to use, as
appropriate.
Siphoning: Positively close the line.
3.1.
when the system is off, employ a shutoff valve in the line to serve this purpose.
Siphoning: Break the siphon.
3.2.
delivery line. This must be located above the "full" line of the tank.
Dribbling: Flush the entire chemical delivery line.
3.3.
that remains in the injection line between the pump and the machine is free to flow into the
machine, employ a system that flushes the entire line between the pump and the injection point
with fresh water after each injection.
PELLERIN MILNOR CORPORATION
Examples
Legend
—If the pump does not provide positive closure
—Provide an air gap or vacuum breaker in the chemical
—If any concentrated chemical
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