Groz BGRP Series, BGRP/30, BGRP/50, BGRP/15 Instruction Manual
INSTRUCTION MANUAL S1350, Rev C
Air Operated Grease Ratio Pumps 50:1
BGRP
Congratulations on purchase of this World Class Air Operated Grease Ratio Pump!
• World-class Industrial High
Pressure Grease pump with
guaranteed performance &
hassle free operation
• Pump dispenses Grease at
pressures upto 50 times the Air
inlet pressure.
• Designed to work in tough
conditions- Ideal for use in
Industry, workshop, farm,
construction or as part of the
Mobile Grease system
• All metal construction, fully
CNC machined with hardened
wear resistant moving parts
• Reciprocating piston operated
2.5” (63 mm) dia. Air Motor
• Fitted with strainer at suction
tube inlet for clean grease to
the bearing
Pull Handle
Grease Control Valve
Z Swivel
High Pressure
Rubber Hose
Drum Capacity
30 Kg
Grease Pump
Drum Cover
Cover Screws
Grease Drum
Wheels
• Supplied complete with built-in
Steel Drum, wheels & pull
handle, Drum Cover, rubber
lined Follower Plate, 7’ (84”) of
high pressure Grease Hose, Z
swivel & professional Grease
Control Valve
Drum Capacity
15 Kg
1
Drum Capacity
50 Kg
PUMP CONSTITUENTS
1. Grease Pump Assembly
2
3
1
2. Drum Cover
3. Rubber Lined Follower Plate
4. Steel Bucket with Cover Screws, Wheels & Pull Handle
5. High pressure Rubber Hose
6. Professional Grease Control Valve with Z Swivel
4
PUMP CONSTRUCTION
Drive Section
5
The pump is made up of two sections as given below :-
• Drive section :- It consists of an Air Motor Assembly driven
by compressed air. The piston diameter of the air motor is
2.5” / 63 mm. The motor consists of an air cylinder with
piston and one reciprocal valve with a nylon slider. The valve
directs the compressed air alternately to the top or bottom
of the piston, thus producing a reciprocating motion of the
piston rod.
• Pumping Section :- It consists of a pump in which a piston
lifts the grease through Non Return Valves by reciprocating
inside the pump cylinder. The grease is discharged with
pressure (from the outlet located at bottom of Air Motor) into
the delivery hose.
6
Pumping Section
NOTE
AIR MOTOR of these pumps starts automatically when the
Grease Control Valve is opened. When the valve is closed, Air
Motor builds up a back-pressure and stops operating the pumping
section.
PRESSURE RATIO of the pump states the ratio of the output
grease pressure to the incoming air pressure. When the pressure
ratio is 50:1, we achieve an output grease pressure up to 7500 PSI
(500 BAR) when the incoming air pressure is 150 PSI (10 BAR ).
2
WORKING OF PUMP
UPSTROKE DOWNSTROKE
C
C
A
I
J
UPSTROKE -
B
E
G
F
H
D
A
I
D
J
B
E
G
F
H
DOWNSTROKE -
When Grease Control Valve is opened, compressed air enters
at arrow A and passes through passage B to the underside of
the Piston C, driving the Piston C and Piston Rod D upwards.
The air above the Piston is evacuated through passage E, past
the Slider Valve F and out at arrow G.
The Piston approaches top dead centre and Piston Rod D
makes contact with the Slider Rod H. Now the Slider Rod H
starts moving up with the Piston Rod D.
The air motor repeats Upstroke & Downstroke in continuous cycle to produce a reciprocating motion, driven by compressed air. This
motion is transferred via a connecting rod to the piston in the Pumping Section. During every upstroke, non return valves (with spring
& ball check) get opened & the piston lifts the grease. During every downstroke, non return valves get closed & the piston discharges
grease from the outlet valve.
Closing the Grease Control Valve shuts off the air motor & pump stops dispensing grease.
The incoming air is now led via passage E to the upper side
of Piston C, driving it and the Piston Rod D downwards. The
air under the Piston C is evacuated through passage B, past
the Slider Valve F and out at arrow G.
The Piston approaches bottom dead centre and Piston rod
D makes contact with the Slider Rod H. When Slider Rod H
passes its centre position, the Pusher Spring I and Pusher
Button J snap it over to its lower position.
3
INSTALLATION
NOTE
An FRL (Filter-Regulator-Lubricator) unit must be used in the Air supply, before it is connected to the pump. Set the regulator to 6 BAR (90 PSI)
or any required inlet pressure, but never more than 150 PSI (10 BAR) or less than 30 PSI (2 BAR).
1. Fill the drum with
Grease leaving empty
space of about 2” from
the top rim. Shake the
drum after it is filled
to remove air pockets.
Place the follower
plate in the grease
drum with the
lift handle facing
upwards. Push the
follower plate down,
until some grease is
forced through the
centre hole on the
plate.
2. Place the drum cover
on the drum. Lift the
pump assembly &
slide the suction tube
through the drum
cover & centre hole in
the follower plate.
3. Push the pump
assembly down till
the bottom of the
pump touches the
base of the drum.
Adjust the drum cover
and tighten it with
the thumb screws
provided along with
the drum cover.
Lift Handle
Thumb
Screw
4. Tighten the drum cover
with the pump suction
tube with the help of
thumb screws.
Thumb Screws
5. Use a wrench to tighten
high pressure hose to the
pump outlet.
6. Use a wrench to tighten
the other end of the hose
to Z Swivel of grease
control valve. Tighten the
outlet extension & coupler
to the control valve outlet.
Use thread sealant on all
connections to ensure
leak-proof working.
7. With the air supply turned
off, connect the Air line
into the air inlet on the
pump.
Hose
Extension
& Coupler
Z Swivel
Air Line
4
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