User's Manual

Manzel
®
Model 25 Lubricator
™
Page 2
L51010
ASSEMBLY
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.
CLEAR-VUE SIGHT FEED COVER
DRIP TUBE
FEED REGULATOR
PUMP MOUNTING SCREWS
OUTLET BALL VALVE METERING CIRCUIT
INLET PORT METERING CIRCUIT
METERING PLUNGER
PUMP CROSSHEAD
INLET TUBE
INLET STRAINER
SIGHT CHAMBER WELL
DISCHARGE PLUNGER
(AT TOP OF STROKE)
INLET PORT DISCHARGE CIRCUIT
ECCENTRIC ON
HEXAGON ECCENTRIC SHAFT
RESERVOIR