FLOJET G70 Serie Manual De Instalación, Operación Y Mantenimiento página 4

6.0 Dimensional Drawing
3.21
(82)
2.20
(56)
4.52
(115) 5.81
(148)
0.71 0.92
Fluid In Fluid Out
(19) (23)
1.84
(47)
7.0 Installation and Operation
20 PSI
Min.
20 100
CO /Air =
2
7.1 MOUNTING
The Flojet G70/G71 pump is self-priming and should be mounted in a
dry and well-ventilated area. This pump can be mounted several feet
from the tank, above or below the fluid level. No more than 4 feet above
the fluid level is recommended. Note: This is not a submersible pump.
Secure the pump to desired mounting fixture by inserting screws
through the rubber grommets in the base of the pump. Liquid Ports must
be facing down.
7.2 HOSE CONNECTIONS
Liquid In – Use 3/8" or ½" ID reinforced hose or equivalent. Avoid sharp bends that could
restrict flow or cause hose to collapse under vacuum.
Liquid Out – Use 3/8" or ½" ID reinforced hose for discharge tubing.
7.3 PLUMBING
Use a flexible hose to avoid excess stress on pump fittings.
Do not crimp or kink hose.
All hoses should be the same size as the pump fittings.
All fittings and hoses must be compatible with fluid being
pumped.
The use of check valves in the plumbing system could
interfere with priming ability of the pump. If unavoidable,
check valves in the plumbing system must have a cracking
pressure of 2 PSI or less.
It is recommended that an inline strainer with a minimum
of 40 mesh be used on the suction line of the pump to
keep large foreign particles from the pump valves which may result in loss of priming ability. The
strainer must be rated for use in a potentially explosive atmosphere.
7.4 OPERATION
DANGER: ASPHYXIATION HAZARD. If CO2 or N2 gas is used to drive the pump
make sure the area is well ventilated or gas is exhausted to outside atmosphere
via hose.
CAUTION: If pump is to be used in high flow, low pressure applications, adjust gas
pressure to 20 PSI (1.38 BAR) above discharge pressure.
CAUTION: Continuous operation at 120F (49C) will reduce pump life.
At start-up, regulate air pressure to desired setting. For most installations 20 PSI (1.4
Bar) inlet will be adequate. Do not go below 20 PSI. Pump will operate according to
air supply. Flow and pressure can be adjusted by increasing or decreasing air pres-
sure to accommodate varying product viscosities, length of lines or other installation
conditions. Review flow curves for more information. High viscosity fluids and hose
length will limit priming distance.
Compressors must have dryers and/or a water separator in the air distribution sys-
tem (REF: PN FJ520B)
to limit water build-up. Pumps that fail due to water in the air chamber will not be
covered under the
limited warranty.
7.5 DISASSEMBLY AND REASSEMBLY PROCEDURES
Service the pump in a safe area away from the hazard zone. Ensure the pump
discharge is not
pressurized before disconnection for service.
Prior to cleaning or servicing the pump, purge all liquid from the pump by removing
the supply line from the fluid sources and running the pump with the fittings point-
ing upward to empty completely. Turn off air supply to the pump and disconnect air
inlet line. Remove fittings and muffler by using a flat head screw driver to slide the
retaining clips away from the fittings. The following steps describe removing the
pump end covers for replacing check valves and/or diaphragms.
4.58 0.25
(116) (6.4)
5.27
Inches (millimeters)
(134)
Air Inlet
Air Exhaust
Muffler
100 PSI
Max.
15 FEET
(4.57M)
MAX
40 Mesh
Strainer
Liquid
Source
FLEXIBLE
HOSE
To Outlet
Source
STEP 3
With the end caps removed. Inspect the check valve Assy. (REF: balloon #1 on exploded
view). Note the position of the suction and discharge valves before removing them from the
pump housing. Remove valves and inspect for wear, debris or deformation. Replace check
valves with new ones if necessary. Ensure that they are in the proper suction/discharge flow
orientation. Install the suction valves with springs facing into the pump body and the dis-
charge valves with the springs facing out. See flow arrows on pump rear end cap below
the suction and discharge ports. Failure to do this correctly will result in the pump being
inoperable.
STEP 4
To disassemble the diaphragm Assy. (REF: balloon #2 on exploded view), remove the first
diaphragm from the pump shaft by unscrewing in a counter clockwise direction. Be sure to
hold the opposite diaphragm securely while trying to unscrew first diaphragm. The second
diaphragm is removed by placing the flat tip of a screw driver into the exposed slot at the
end of the pump shaft where the first diaphragm was removed and unscrew the diaphragm
in a counter clockwise direction. Inspect diaphragm for visual signs of wear and tear. Replace
diaphragms with new ones if necessary. Reassemble diaphragms by screwing them on to the
pump shaft turning clockwise until tight.
STEP 5
Make sure the port clips are located on the pump body before attaching the end caps. Slowly
replace the end caps by making sure the index guide posts are aligned. Install and torque
screws sequentially as shown in the following image. Screw torque is 20 – 24 inch pounds.
Check pump for leaks before putting into service.
RIGID
PIPE
8.0 Exploded View and Parts Breakdown
MODEL G70/G71 SERIES EXPLODED VIEW