.-.,
Vacuum PumD Fluid Filter
The fluid filter is a spin on, full flow unit with a high
efficiency, micro-fiberglass media. Replacement of the
filter requires spinning off the complete cartridge and
replacing it with a new one.
Use genuine Quincy
replacement fluid filters only.
The initial filter cartridge change should occur after the
first 100-200 hours of operation. During normal
service, the filter cartridge should be replaced under the
following conditions,
whichever occurs first:
● Every 1000 hours
● Every fluid change
● After each fluid analysis sample is taken.
Vacuum Pump Air/Fluid Separator Element
The element is of one piece construction that coalesces
the fluid mist, as it passes through the filtering media,
into droplets that fall to the bottom of the separator
element to be picked up by a scavenging tube and
returned to the vacuum pump. Care must be taken in
---
handling the separator element to prevent it from being
damaged. Any denting may destroy the effectiveness of
the filtering media and result in excessive fluid
carryover. Even a very small hole punctured through
the element will result in a very high carryover of fluid.
The vacuum pump air/fluid separator element must be
changed for any of the following conditions, whichever
occurs first:
● As indicated by the Differential Pressure Indicator
for the separator element.
● When excessive fluid carryover is noted and it has
been determined that the scavenging system is
functioning properly, the fluid temperature is
normal, the running fluid level is correct, and the
vacuum pump is not cycling rapidly between load
and unload.
● Every 8000 hours
●Any time the pressure gauge on the instrument panel
reads greater than 7 psig. Periodic checks should be
made when the fluid is up to operating temperature, the
inlet valve is full open and the system to be drawn down
is at 10 “ HgV, this condition requires the maximum
horsepower input under strict vacuum pump operating
, ...
conditions. Cold fluid or pressure in the discharge line
from the air/fluid reservoir will result in an overly high
reading.
Failure to change the separator element before it
exceeds the pressure given above will result in blown or
tripped overload fuses and/or shortened electric motor
life. The pressure given above has nothing to do with
the collapsing point of the separator element but
pertains only to the motor overload limit.
In an emergency, operation can temporarily be
continued with a clogged separator by restricting the
inlet to the vacuum pump. Install a hand valve in the
vacuum pump inletdownstream of the inlet filter and
adjust it until the pressure reading on the gauge is in
the green. Lock the hand valve setting in place to
prevent it from being changed. This temporary fix will
permit continued operation but will increase the length
of time it takes to draw down the system. If steps 1 or 2
above are noted the separator element will have to be
changed,
If the unit is designed for vacuum-compressor operation
and it is to be operated this way, the factory should be
consulted for the limiting pressure levels at which the
separator element should be changed.
Fluid
Scavenging System
Fluid from inside the separator element is returned to
the system side of the vacuum pump rotor housing by
way of a scavenger pipe positioned inside the airlfluid
separator element, through a filter screen and orifice
contained in a straight fitting mounted in the top plate
of the air/fluid reservoir and through a nylon tube to the
inlet valve. Failure to keep the filter screen and orifice
clean will result in excessive fluid carryover.
Cleaning of the filter screen and orifice should be
performed for any of the following conditions,
whichever occurs first:
● When no fluid is observed moving through the
nylon scavenging tube and the vacuum gauge reads
between 1 to 20 “ HgV. The nylon tubing will also
feel cool to the touch if there is no flow through it.
● When excessive fluid carryover is noted.
● Every fluid change
NOTE: DO NOT ream or change
the orifice size.
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