Parker Finite H-Series Maintenance Bulletin

Maintenance Bulletin - International H-Series
INSTALLATION
Finite H-Series filters should be installed in a level pipeline,
mounted vertically, the bowl downward with one bowl length
clearance for element removal. The filter should be installed at the
highest pressure point available, and as near as possible to the equipment
to be protected and have a drip leg immediately upstream.
coalescers and particulate filters should be visible and
easily accessible for periodic draining and maintenance.
The filters should be piped in accordance with the instruction tags,
flow arrows or "IN" and "OUT." Should these tags become unreadable,
install the coalescer so that flow passes through the filter tube from
inside-to-outside. Plumb particulate and adsorber filters so that flow passes
through the filter from outside-to-inside. The various filter locations relative
to other equipment should be as follows (unless specific instructions are given
to the contrary): (1 ) COALESCERS and WATER SEPARATORS are placed
before the dryer. (2) The INTERCEPTOR (Particulate) goes ahead of the
COALESCER when pre-filtration is required. (3) The INTERCEPTOR is
installed downstream of desiccant dryers to prevent desiccant migration.
(4) The ADSORBER is always preceded by a COALESCER.
When Coalescer or Interceptor differential pressure reaches clogged condition
(6-10 PSID) replace element immediately. DO NOT ATTEMPT TO CLEAN
FILTER TUBE. System contamination can result. DO NOT ATTEMPT TO
RESEAT A FILTER TUBE. New serrated indentations can be formed causing
leakage. DO NOT BY-PASS THE COALESCER unless the by-pass line is
also filtered.
TROUBLESHOOTING CHART
Problem
Too High Initial
Pressure Drop
Premature Clogging
(Air Flow Drops Off)
Oil Present Down-
stream of Filter
(1/4" to 1" NPT, BSPF, BSPT Sizes only)
Probable Cause
Air flow Excessive for housing size.
Filter media grade too fine.
Too much oil/water from compressor.
Lubricant improperly selected for compressor,
causing varnish or carbonizing of lubricant.
Excessive inlet particulate contamination.
Excessive lubricants present on element caused
by either high lubricant viscosity or very high
inlet aerosol level.
Oil/water emulsion forming on element.
Ice forming or oil viscosity too high due to
Excessively low unit temperature.
Bowl not properly drained of waste liquids.
Element not sealing.
Filter piped backwards.
Filter being by-passed by valving.
Contaminated air entering system from second
source downstream.
Oil vapors condensing downstream.
Excessive inlet oil level.
Element damaged, chemically attacked or not
installed in housing.
Oil present in pre-contaminated
downstream piping.
Excessive flow surges.
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OPERATION
Air coalescing is a continuous, balanced, steady-state process
occuring at or below rated flow, which depends on two factors for
high performance: (1) The bowl must be kept free of waste liquid
build-up and (2) The element must be replaced when the differential
The
pressure reaches 6-10 psid, 12 psid Maximum. Differential pressure
can be sensed at the inlet and outlet ports by two gauges, or by Finite's
DPI-13 differential pressure indicator, DPG-15 differential pressure
gauge, or by observing system characteristics.
Bowl draining is accomplished by opening the manual drain valve
(standard on all housings), at least once every 8 hours depending
on the liquid load. The Finite Auto-Drain AD-12 is a useful tool that
replaces manual draining.
used to drain the bowl automatically.
A Finite coalescer, under normal system conditions, will operate for
6 to 12 months before reaching its Maximum differential pressure.
A "PU" series Interceptor, or a "QU" series coalescing element
with a pleated prefilter can be employed ahead of the coalescer
to increase its life. The interceptor should be replaced when its
differential pressure reaches 8 - 10 psid.
Finite coalescers are designed for nominal operation with 10-20 wt.
oil. Any viscosity increase over that of 20 wt. oil must be offset by
a proportionate oversizing of the filter element. Consult your Finite
representative.
Solution
Install larger filter.
Install coarser element.
Pre-coalesce with grade 10 - oversize
housing.
Change oil, consult with lubricant
supplier.
Prefilter with Interceptor.
Prefilter with Grade 10 and oversize
coalescer to compensate.
Remove water by drip leg, aftercooler.
Install mechanical separator upstream.
Raise temperature.
Drain regularly, use auto drain.
Replace element.
See "INSTALLATION"; Re-pipe.
Close valve.
Change pipe or relocate filter.
Install an adsorber.
Precoalesce with Grade 10 and
possibly oversize.
Change and consult distributor
or factory for other than neutral pH.
Clean piping.
Relocate filter, pre-coalesce with
grade 10 and oversize coalescers.
19
MB-141
Finite's timed drain valve can be
Parker Hannifin Corporation
Finite Filter Operation
Oxford, MI