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5.
Foot valve installation
A weight is provided to hold the tubing and foot valve in a vertical position at the
bottom of the tank.
Do not allow the foot valve to lay horizontally in the chemical
container.
This defeats the action of the valve and causes the pump to lose prime.
Keep suction tubing reasonably short and avoid high spots or bends.
6.
Injection valve installation
The injection valve is designed to prevent a back flow and to inject chemical into the
line. To work properly, this valve must be mounted within 45 degrees of vertical (see
drawing). One end of the injection valve is /2” MNPT. Install this end into the piping
system. Use Teflon tape on this fitting only. Connect the pump’s discharge tubing to
the opposite end of the injector. Do not use Teflon tape or joint compound on this
fitting. Connect tubing between this fitting and the pump discharge fitting at the pump
head.
80
Variation
Acceptable
Flow
DO NOT
Use Teflon Tape
On Machine Threads
USE
Teflon Tape On
These Threads Only
Injection
Check Valve
Pipe Cross
Section
NOTE: When installation is made into a line with zero pressure or when pumping into an
open vessel, use our three-function valve to prevent syphoning.
7.
Optional Three Function Valve.
Anti-siphon
feature allows metering of liquids “down hill” or into the suction side of
a circulating pump. It provides protection against an accidental application of suction
pressure at the fluid injection point. Its Teflon coated diaphragm provides a positive
anti-siphon action.
Back pressure
function permits metering into atmospheric discharge (open container)
without overpumping.
Line check
permits removal of discharge tubing without release of system fluid.
8.
Priming/bleed valve connection
Connect the clear poly tubing to the outlet of the bleed or priming valve. Position the
free end of this tube in the chemical container. Standard head configurations include a
priming valve built into the head. Clear poly tubing should be connected to the outlet of
this valve, the other end of the tube should be placed in the chemical container above
the fluid level.
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