Van Air Systems F101 Series - Manual (Page 4)

PAGE 4
2950 Mechanic Street
Lake City, PA 16423-2095
Phone: 800/840-9906
Fax: 814/774-3482
www.vanairsystems.com
CONDITION
Initial pressure
drop too
high
Oil carryover
Short element
life
POTENTIAL CAUSE
Filter undersized for flow rate.
Filter grade too fine.
Filter inlet smaller than pipe size.
Oil present in system before installing filter.
Excessive inlet oil > 50ppm.
Filter installed backwards.
Filter bowl not being drained.
High differential pressure.
Defective seal.
Incorrect replacement element.
By-pass valve leaking or open
Unfiltered air entering from source down stream of filter.
High operating temperatures.
Cooling by refrigerated dryer.
Excessive particulate contamination.
High compression temperatures causing varnish/carbon
formation.
Oil water emulsion overloading element.
High viscosity oil or freeze-up due to low ambient tem-
perature.
RECOMMENDATION
Install larger filter.
Install coarser grade element.
Install larger filter.
Clean piping.
Check compressor and/or air/oil separator if compressor is rotary vane
or screw. Lower lube rate if reciprocating compressor. Install coarse
coalescer for prefiltration.
Check installation instructions.
Check and repair auto drain. Drain frequently if manual valve.
Check element if excessive (7-10 psid or above).
Check o-ring in element.
Check and use finer grade.
Close valve. Check seals.
Relocate filter or install additional filter.
Install, clean, replace or relocate aftercooler.
Install grade B or C filter downstream of dryer.
Install coarse coalescing filter immediately upstream of existing filter.
Use compressor lubricant with good temperature stability. Lower lube
rates where possible. Use coarser grade filter element.
Inspect separator. Remove water with better separation.
Raise ambient temperatures. Heat trace inlet piping and housing.
TROUBLESHOOTING