Wilkerson M31 User Manual
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Richland, MI 49083 Tel: (269) 629-5000
F
D
E
B
A
M31
C
Installation & Service Instructions
83-284-000
Coalescing Filter Model M31 with
Variations and Accessories
ISSUED: February, 2006
Supersedes: August, 1995
Doc.# 83284000, ECN# 060135, Rev. 2
WARNING
To avoid unpredictable system behavior that can cause personal
injury and property damage:
• Disconnect electrical supply (when necessary) before installation,
servicing, or conversion.
• Disconnect air supply and depressurize all air lines connected
to this product before installation, servicing, or conversion.
• Op er at e w it hi n t he m an uf ac tu re r’s s pe cified pr essure,
temperature, and other conditions listed in these instructions.
• Medium must be moisture-free if ambient temperature is below
freezing.
• Service according to procedures listed in these instructions.
• Installation, service, and conversion of these products must be
performed by knowledgeable personnel who understand how
pneumatic products are to be applied.
• After installation, servicing, or conversion, air and electrical
supplies (when necessary) should be connected and the product
tested for proper function and leakage. If audible leakage is
present, or the product does not operate properly, do not put into
use.
• Warnings and specifications on the product should not be
covered by paint, etc. If masking is not possible, contact your
local representative for replacement labels.
CAUTION
Polycarbonate bowls, being transparent and tough, are ideal for use with
Filters and Lubricators. They are suitable for use in normal industrial
environments, but should not be located in areas where they could be
subjected to direct sunlight, an impact blow, nor temperatures outside
of the rated range. As with most plastics, some chemicals can cause
damage. Polycarbonate bowls should not be exposed to chlorinated
hydrocarbons, ketones, esters and certain alcohols. They should not be
used in air systems where compressors are lubricated with fire-resistant
fluids such as phosphate ester and diester types.
Metal bowls are recommended where ambient and/or media conditions
are not compatible with polycarbonate bowls. Metal bowls resist the
action of most such solvents, but should not be used where strong acids
or bases are present or in salt laden atmospheres. Consult the factory
for specific recommendations where these conditions exist.
TO CLEAN POLYCARBONATE BOWLS USE MILD SOAP AND
WATER ONLY! DO NOT use cleansing agents such as acetone,
benzene, carbon tetrachloride, gasoline, toluene, etc., which are
damaging to this plastic.
Bowl guards are recommended for added protection of polycarbonate
bowls where chemical attack may occasionally occur.
WARNING
To avoid polycarbonate bowl rupture that can cause personal injury or
property damage, do not exceed bowl pressure or temperature ratings.
Polycarbonate bowls have a 150 PSIG pressure rating and a maximum
temperature rating of 125°F.
INSTALLATION
1. Refer to Warnings and Cautions.
2. Purge downstream air line of oil.
3. Install as close as possible to where regulated air is being used.
4. Install the unit with the air flowing in the direction indicated by the
arrow on the body.
5. A drain line with 3/8" or 10mm ID flexible tube connection may be
attached to drain port if desired.
6. Maximum inlet pressure and operating temperature ratings are:
transparent plastic bowls, 150 psig (10,3 bar) and 125°F (52°C);
metal bowls, 150 psig (10,3 bar) and 150°F (66°C).
TYPICAL INSTALLATION (not to scale)
A. PREFILTER - It is recommended that a Wilkerson 5-micron-rated
prefilter be installed upstream from the coalescer filter to prolong
element life.
B. AIR DRYER - (Refrigerative or Twin Tower). An air dryer is generally
preferred for optimum results, but is optional.
C. COALESCER FILTER - Do not touch the filter element once it has
been put into service; the slightest pressure on the outer foam cover
can easily damage it once it has been used.
D. AC PAK - The Type D element is an adsorption type for removing oil
vapors. Oil-associated odors, whether petroleum base or synthetic
base, and nearly 100% of any removing solid contaminants are
removed.
E. Differential Pressure Indicator - Maximum recommended pressure
drop across coalescer filters is 7 psi (0,5 bar). This can be monitored
by installing a Wilkerson differential pressure indicator.
F. VALVE - Do not use a valve or shutoff device in conjunction with a
coalescer filter that will allow a momentary or surge pressure drop
greater than 50 psi (3,4 bar). To avoid high surges which can either
ruin the element or momentarily allow downstream contamination,
use a slow- opening type valve.
WARNING
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF
THE PRODUCTS AND/OR SYSTEMS DESCRIBED HEREIN OR
RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND
PROPERTY DAMAGE.
This document and other information from The Company, its subsidiaries
and authorized distributors provide product and/or system options for
further investigation by users having technical expertise. It is important
that you analyze all aspects of your application, including consequences of
any failure and review the information concerning the product or systems
in the current product catalog. Due to the variety of operating conditions
and applications for these products or systems, the user, through its own
analysis and testing, is solely responsible for making the final selection of
the products and systems and assuring that all performance, safety and
warning requirements of the application are met.
The products described herein, including without limitation, product
features, specifications, designs, availability and pricing, are subject to
change by The Company and its subsidiaries at any time without notice.
EXTRA COPIES OF THESE INSTRUCTIONS ARE AVAILABLE FOR
INCLUSION IN EQUIPMENT / MAINTENANCE MANUALS THAT UTILIZE
THESE PRODUCTS. CONTACT YOUR LOCAL REPRESENTATIVE.
Coalescing Filter Model M31 with Variations and Accessories 83-284-000
PRESS
TURN
PRESS
TURN
D iff e rential
P r es sure
In d icator
Body
N NR
Body
N NR
Gasket
Gasket
Filter
Element
Type B
or Type C
Flex-Drain
TM
(Plastic Bowls Only)
Automatic
Drain
O-ring
Automatic
Drain
O-ring
O-ring
Transparent
Bowl
Bowl
Guard
Nut
Clamp Ring
Assembly
NNR
Clamp Ring
Assembly
NNR
Nut
Insert
Retaine
r
Petcock
Metal
Bowl
Filter
Element
Type D
Bowl
Insert
Plate
Bowl
O-ring
Bowl
O-ring
MAINTENANCE
1. The element operates effectively when it is saturated. The element's
useful life will end only when the resistance to flow becomes too high
or the maximum permissible pressure is reached. The element cannot
be cleaned or reused and must be replaced at the end of its useful
life.
2. IF THE UNIT HAS A MANUAL DRAIN, drain the unit once every 8
hours.
3. When bowl becomes dirty, replace the bowl or clean by wiping with a
dry, clean cloth.
4. Before placing the unit in service, make sure that the bowl and bowl
guard are reinstalled, and securely locked in place.
REPAIR KITS AND REPLACEMENT PARTS
Bowl O-Ring Kit (Buna-N) -10 per Kit .................................GRP-95-256
Bowl O-Ring Kit (Fluorocarbon) -10 per Kit ........................GRP-95-942
Filter Element Repair Kits –
Type D Element Kit ..........................................................MXP-95-522
Type C Element Kit .......................................................... MTP-95-521
Type B Element Kit .......................................................... MSP-95-993
Flex-Drain™..........................................................................FRP-95-610
Automatic Drain (w/ Nitrile Seals) ........................................ GRP-95-973
Automatic Drain (w/ Fluorocarbon Seals) ............................ GRP-95-981
Plastic Bowl Kits –
with Flex-Drain™ w/ Fluorocarbon Seals ........................ GRP-95-940
with Flex-Drain™ w/ Bowl Guard ..................................... GRP-95-938
with Automatic Drain / Fluorocarbon Seals /
Bowl Guard ...................................................................... GRP-95-941
Bowl Guard .......................................................................... DRP-95-810
Metal Bowl Kits –
with Petcock / Fluorocarbon seals ................................... MRP-95-939
Differential Pressure Indicator ..............................................DP2-01-000
ACCESSORIES
Wall Mounting Bracket ......................................................... GPA-95-946
NNR = Not Normally Replaced
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