Mounting And Chemical Supply Connection - Graco Mongoose Series Instructions - Parts Manual

Mounting and Chemical Supply
Connection
Failure of the diaphragm or a rupture in the fluid lines
may cause exposure to toxic fumes or a loss of solu-
tion in the tank. Install a fluid line shutoff valve as
close to the chemical tank as possible to minimize the
loss of, and exposure to, potentially toxic chemicals.
Flooded Suction Mounting
The fluid end (9) of the pump, shown in F
to accommodate mounting of the pump next to the
chemical supply container (G), shown in F
NOTE: The inlet valve (2 or 102) must be kept in a verti-
cal position for proper operation. The fluid end (9 or 109)
can be removed and rotated 90° if needed.
Suction Lift Mounting (Plastic Fluid Section
only)
The pump is mounted on top of a chemical supply con-
tainer, shown in F . 4, so that the distance from the
IG
pump to the bottom of the container does not exceed
5 ft.
A weight is provided to hold the inlet fluid line (D) and
foot valve (H) in a vertical position at the bottom of the
container. Keep the inlet fluid line (D) relatively short,
and avoid high spots or bends.
NOTE: Do no allow the foot valve (H) to lie horizontally
in the tank. This defeats the action of the valve and
causes the pump to lose prime.
3A4131H
Injection Check Valve Connection (Plastic
Fluid Section only)
The injection check valve is designed to prevent a back
flow and to inject chemical into a piping system. This
valve must be mounted within 45° of vertical (see F
3).
1. Install the 1/2 in. NPT end into the piping system.
Apply PTFE tape to this end only.
2. Connect the outlet fluid line (E) from the Mongoose
pump to the to the other end of the injection check
valve.
. 2, is set up
IG
. 4.
IG
Use PTFE tape on
these threads only
Do not use
PTFE tape here
E
F . 3: Injection Valve Connection
IG
Three-Function Valve Injection Assembly
(Plastic Fluid Section only; Optional)
The optional three-function valve injection assembly
provides three functions in one injection valve assembly.
• Anti-siphon - which allows metering of liquids into
the inlet side of a circulating pump. It provides pro-
tection against an accidental application of suction
pressure at the fluid injection point. A PTFE coated
diaphragm provides a positive anti-siphon action.
• Back pressure - which permits metering into atmo-
spheric discharge (such as an open container) with-
out overpumping.
• Line check - which permits removal of outlet tubing
without release of system fluid.
Installation
.
IG
Pipe Cross
Section
Injection
Check Valve
7