Graco Manzel 25 Lubricator User Manual

Manzel® Model 25 Lubricator

DESCRIPTION

Manzel Model 25 Force Feed Lubricators are economical, general­purpose units of double plunger design for precise metering of
lubricants (either mineral oil base or synthetics). They provide
lubrication to cylinder walls, bearings and other moving parts
of equipment such as sugar mills, steam engines, presses and
general machinery. They are furnished with Clear-Vue Pumping
Units whose sight feeds, operating at atmospheric pressure,
show the output of lubricant to individual points of lubrication. All
working parts are totally enclosed—away from dust, water and
impurities—and self-lubricated at all times by the lubricant in
the reservoir. Standard Lubricators may be had in 1 to 20 feeds
for feeding the same type of lubricant. A choice of Drives and
Mounting Arrangements facilitates designing Lubricators into
Original Equipment or installation on existing machinery. These
can be driven from rotating or reciprocating parts of machines or
engines or by independent motors.

FEATURES/BENEFITS

General-Purpose Lubrication: • automatic, precision

metering for all types of machinery.

Pressures:• Up to 1000 psi

Type Pumping Unit:• Clear-Vue. Sight Feed Chamber

functions at atmospheric pressure. Shows amount of
lubricant being pumped.

Unitized Construction:• Contains complete feed regulating
mechanism. Equipped with inlet strainer.

Number of Feeds:• 1 to 20 per Lubricator, standard.

Displacement, Output:• 1/4 to 12 drops per stroke with 5/16

in plunger; 1/6 to 6 drops per stroke with 3/16 in plunger.

Available Drives:• Direct Rotary (1:1), Ratchet, 37.5:1 and
75:1 internal gear reductions.

Reservoirs:• Single Compartment, sheet metal construction.

Feed Regulator:• External screw-type precisely adjustable

while idle or in operation.

Removable Pumping Unit:• Self contained. All units
interchangeable - remove two pump screws and lift out.

Hand Crank:• Standard. Convenient for rapid priming of
lines before start-up or for momentarily increasing supply of
lubricant. Does not affect adjustment or individual pumping
units. Replaces obsolete Kipp Model 50 Box Lubricators.

SPECIFICATIONS

Reservoir Heavy-gauge fabrication sheet steel

Cylinder Cast iron

Plunger 416 hardened SS, precision-ground

Valve Hardened stainless steel balls

Eccentrics Sintered metal, single throw on hexagon

eccentric shaft

Gaskets, Seals Standard for mineral oil base lubricants.

Special materials available for synthetics

Filler Cup Round with vents and strainer

Discharge Check Valve Double ball discharge check valve

assembly with 1/4 in NPSF vertical outlet

Finish All ferrous metal drive parts Parco-Lubrited.

Reservoir exterior, cover and pumps
painted with durable hammertone gray
finish. Nickel plate, available.

Manzel® Model 25 Lubricator

ASSEMBLY

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L51010

CLEAR-VUE SIGHT FEED COVER

PUMP MOUNTING SCREWS

OUTLET BALL VALVE METERING CIRCUIT

INLET PORT METERING CIRCUIT

METERING PLUNGER

PUMP CROSSHEAD

INLET TUBE

INLET STRAINER

SIGHT CHAMBER WELL

DRIP TUBE

FEED REGULATOR

DISCHARGE PLUNGER
(AT TOP OF STROKE)

INLET PORT DISCHARGE CIRCUIT

ECCENTRIC ON
HEXAGON ECCENTRIC SHAFT

RESERVOIR

OPERATION

CLEAR-VUE PUMPING UNIT – Model 25 Lubricators operate on

a double plunger pump principle with a metering and a discharge
plunger actuated through a yoke by an eccentric on the eccentric
shaft. The metering plunger controls the amount of lubricant fed to
the discharge plunger. This metered amount is adjusted by means
of an external Feed Regulator Screw, which adjusts the stroke
length. The lowermost position of the plunger is varied by the Feed
Regulator Screw, however the uppermost position to which the
plunger rises remains constant.

On the downstroke, the metering plunger draws lubricant up
through the inlet tube, over the inlet valves and into the metering
pump cylinder. On the upstroke, the metering plunger seats its
inlet valves and opens its spring-loaded outlet valve forcing the
metered amount of lubricant, at low pressure, out the drip tube
into the Sight Chamber Well at atmospheric pressure. On the
same downstroke, the discharge plunger opens the cross port
to the Well and draws the metered amount of lubricant into the
discharge pump cylinder. This path is shown in light blue on the
Assembly Drawing.

Finally, on the upstroke, the discharge plunger closes the cross
port from the Sight Well and forces the metered amounts of
lubricant over the discharge valves and into the line, as shown in
solid blue on the Assembly Drawing.

CLEAR-VUE – Sight Feed Chamber contains no “sight feed fluid”
and functions at atmospheric pressure. Molded glass sight cover
and dust shield in various lengths for 1 to 8 pumping units. Drip
tube for each line indicates amount of lubricant fed each point of
lubrication.

NOTE: Due to design characteristics, the Model 25 pump can
only be used in pump to point system. Components such as flow
sensors and divider valves should not be used. Only check valves
are permitted between the pump and the lube point.

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Manzel

Model 25 Lubricator

OPERATING INSTRUCTIONS

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L51010

LUBRICATOR INSTALLATION AND OPERATION – The Manzel

Model 25 Lubricator consists of a metal reservoir which contains
the drive mechanism, ratchet or rotary, the individual pump units
and accessory equipment as ordered.

The Lubricator should be solidly mounted and aligned to connect
the drive shaft to the proper stroking or rotary motion. This drive
motion, through the Lubricator drive, should operate the Lubricator
eccentric and hand crank shaft between 3 and 60 RPM. There
is one pump stroke for every revolution of the hand crank shaft,
which is an extension of the eccentric shaft. The proper eccentric
shaft RPM should be determined from the required maximum and
minimum pump feed rates. The RPM selected should be such that,
when each pump is set at its required feed rate, the feed rate can
still be increased or decreased by the feed regulator screw. In most
cases, due to the wide adjustment of the pump units, there will
be considerable allowance in the selection of the proper eccentric
shaft speed.

Note: this eccentric shaft speed will seldom be the same as
the Input shaft speed, but will always be the same speed as
the hand crank shaft extension.

The individual pumps operate on a double plunger principle with
the metering and discharge plungers actuated through a yoke
or crosshead by an eccentric on the eccentric shaft. The small
or metering plunger draws a metered amount of oil from the
reservoir over the inlet ball valves and forces it over the outlet ball
valve through the drip tube and into the clear-vue sight well at
atmospheric pressure. The discharge plunger draws the metered
amount of oil along with air from the sight well over the inlet
sleeve valve and forces this mixture over the ball discharge valves
toward the point of lubrication. The stroke of the small metering
plunger is varied to change the metered oil intake by means of the
external feed regulator screw. The stroke of the discharge plunger
is constant.

IMPORTANT–KEEP LUBRICATOR CLEAN – First, use only
new or filtered lubricant. Periodic cleaning of the Lubricator
is recommended, since lubricant is subject to fouling from
atmospheric dusts and additives. To do this, remove all pumping
units; clean them and the reservoir by dipping and brushing in
a cleaning solvent. Clean all lubrication tubing and check valves
thoroughly at the same time. Next, recharge Lubricator and bleed
lubrication lines at terminal check valve to assure full lubrication
before putting equipment back into operation.

STARTING INSTRUCTIONS – Fill Lubricator reservoir with new or
filtered lubricant to top of reservoir gauge glass. For initial start-up,
adjust pump for maximum delivery by turning feed regulator as
indicated by directional arrow. Then, operate pumps at this setting
and bleed lubrication lines at terminal check valve to assure full
lubrication. The Lubricator is now ready for operation.

FEED RATE REGULATION – Each pumping unit is regulated
independently by means of a feed regulator. To decrease the
feed, turn the feed regulator clockwise. To increase the feed, turn
counter-clockwise. (Follow directional arrow.)

HAND CRANK OPERATION – The hand crank on the end of the
Lubricator is for use before starting or for momentarily increasing
lubricant supply while the Lubricator is in operation. It operates all
feeds at once, but does not affect feed regulation.

PUMP REMOVAL AND REPLACEMENT – To remove a pump, stop
the Lubricator. Remove the discharge line connection and the
pump mounting screws. Next, loosen the adjacent pump mounting
screws. Lift out front end of pump (end with feed regulator screw)
pulling it forward and upward at the same time. This will allow the
yoke or crosshead to clear the eccentric and the pump can be lifted
out. Before replacing a pump, position yoke down as far as possible
and then reverse the above procedure.

TROUBLESHOOTING OVERFLOWING SIGHTWELL – If the pump
sight well fills and overflows into adjacent sight wells, the cause is
dirty or inoperative pump discharge valves. To correct:

Flush discharge check valves.1.

Turn feed regulator to full open.a.
Operate hand crank rapidly.b.

Remove discharge check valves if condition still exists.2.

Shut down unit or turn feed regulator to full closed.a.
Remove discharge line connections.b.
Remove outlet connection from pump unit.c.
Remove check valve. Clean and reseat, if necessary, d.
(care must be exercised to prevent marking the bottom
surfaces when reseating) or replace as conditions
require.
Check top and bottom surfaces of the check valve. e.
These must be free from radial nicks and scratches, as
these surfaces seal against the discharge pressure. Any
leakage around the threads of the outlet connection
can be traced back to dirty or marked check valve
cage, outlet connection, or cylinder sealing surfaces.
Install check in pump housing. Make sure the ball and f.
spring side of the cage faces up.
Replace outlet connection.g.
Replace discharge line connection and put pump back h.
in operation.

ERRATIC PERFORMANCE– Make sure the sight glass is open to
atmospheric pressure through the felt gasket between the glass
and reservoir. These pumps must be able to bring air into the sight
chamber through this gasket. Make certain it is not contaminated
with paint or dirt.

GAUGE GLASS LEAKAGE – Drain Lubricator, check for leaks, and
replace level sight/gasket if necessary.

SYNTHETIC LUBRICANTS – In general, the use of synthetic
lubricants will require that the standard neoprene and Buna-N
gaskets and seals for petroleum base lubricants be replaced with
Butyl rubber gaskets and seals, Refer to Parts List for the part
numbers of the gaskets for use with synthetic lubricants.

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