Manual

PAGE 4
2950 Mechanic Street
Lake City, PA 16423-2095
Phone: [phone]
Fax: [phone]
www.vanairsystems.com
CONDITION
Initial pressure
drop too
high
Oil carryover
Short element
life
POTENTIAL CAUSE
Filter undersized for ow rate.
Filter grade too ne.
Filter inlet smaller than pipe size.
Oil present in system before installing lter.
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
Unltered air entering from source down stream of lter.
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 lter.
Install coarser grade element.
Install larger lter.
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 preltration.
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 ner grade.
Close valve. Check seals.
Relocate lter or install additional lter.
Install, clean, replace or relocate aftercooler.
Install grade B or C lter downstream of dryer.
Install coarse coalescing lter immediately upstream of existing lter.
Use compressor lubricant with good temperature stability. Lower lube
rates where possible. Use coarser grade lter element.
Inspect separator. Remove water with better separation.
Raise ambient temperatures. Heat trace inlet piping and housing.
TROUBLESHOOTING