Graco Manzel HP-50 Service Maintenance Manual

Manzel
High Pressure Lubricators

INTRODUCTION

This manual provides operation and service instructions and a
parts list for the "Manzel" Model HP-50 and HP-60 High Pressure
Lubricators, Discharge and Terminal Check Valves.
The high pressure lubricator comprises one to four integral sight
and pump assemblies in a cast iron reservoir. The unit is designed
for direct connection to an electric motor/speed reducer power
source. A "Manzel" terminal check valve is recommended in the
lubrication system. When required to maintain proper oil viscosity,
the reservoir can be fitted with an optional steam or electric
heater.

SPECIFICATIONS

Plunger Diameter 1/4 in
Max Operating Pressure
HP-50
50,000 psi
HP-60 60,000 psi
0.133 cc/stroke, base on SAE 40 oil
Max Pumping Rate
(approx 4 drops) @ max pressure*
Reservoir Heating
Steam or Electric
(Optional)
*Greater pumping rate may be obtained when operating pressure
is below maximum. Increased viscosity results in a slightly lower
pumping rate.

OPERATING INSTRUCTIONS

1. Oil Level — When necessary, completely fill the lubricator
reservoir with clean filtered lubricant. Three sight glasses,
provided in the reservoir at various levels, permit observation
of fluid level. Oil level should not be allowed to drop below
the bottom sight glass. During the initial filling, the vent plugs
at the top of the pump sight glasses should be removed. This
allows lubricant to rise in the drip tube up to the level of the
oil in the reservoir and reduces the priming re quired at start
up.
2. Pump Priming — If the sight well on the pump does not
contain oil, the pump should be primed. Pumps may be
primed while the lubricator shaft is rotating as follows:
• Adjust the pumping rate to the maximum setting by
turning the adjustment nut on the indicator stem as far
as possible in a clockwise direction.
Model HP-50, HP-60
®
• Remove the vent plug on top of the sight glass and
fill the housing sight well with oil to 3/8 inch below the
discharge of the drip tube.
• Replace the vent plug. Check the sight glass to
insure that it is properly seated against the O-ring to
prevent air leakage into the sight well.
• Readjust the pumping rate to the desired delivery.
3. Pumping Rate — The pumping rate is indicated at the drip
tube inside the sight glass. During the pump suction stroke,
fluid is drawn into the pump from the sight well. This creates
a partial vacuum in the sight well, permitting atmospheric
pressure in the lubricator reservoir to force an amount of oil
equal to the pump displace ment through the drip tube into the
sight well. The rate is adjustable for each pump assembly by
means of the pump regulator which varies the stroke of the
positive displacement, reciprocating pump assembly.
Caution: The drip tube flow rate is accurate after the
pump has operated long enough to stabilize the pressure
inside the sight well. There is a time lag at start-up, low
pumping rates, and during pump rate changes. Allow
sufficient time to insure an accurate rate indication.
4. Regulating Pump Rate — The pumping rate can be varied
infinitely within the range of minimum to maximum by means
of the graduated pump regulators which project through the
reservoir cover. The regulators are easily adjusted by hand
during the pump suction stroke. Maximum pumping rate
is achieved when the adjustment nut on the sight indicator
stem is turned in a clockwise direction as far as it can go. In
this position the sight indicator stem projects the maximum
distance indicating maximum pumping stroke. When the
adjusting nut is turned in a counter-clockwise direction,
delivery reduces, because of a reduction in pump stroke, until
minimum delivery is obtained.
Note: To retain the hydraulic seal between the plunger
and the cylinder walls, minimum delivery must not go
below 1/2 drop (0.017 cc) per pump stroke.