Van Air Systems EHP Elements - Manual (Page 2)

PAGE 2 ©2000 VAN AIR SYSTEMS INC. 2950 MECHANIC STREET, LAKE CITY, PA 16423 PRINTED IN THE USA
MAINTENANCE
Drain coalescing filters every shift.
Check differential pressures weekly on coalescing and
particulate filters (AA, A, B, C, RA, RB, RC, and HT grades).
When differential pressure reaches 10 psid, install clean
elements. On adsorbing filters (grade RD), install clean
elements when hydrocarbon vapors are first detected
downstream or every six months, whichever comes first.
•
•
For correct replacement element model numbers see: label
on filter housing, bottom element endcap and/or page 3.
When changing out element, inspect housing o-ring for
nicks and/or cracks. If any nicks and/or cracks are present,
replace o-ring.
•
•
NING
ELEMENT REPLACEMENT
Close inlet and outlet shutoff valves (and open bypass valve
if provided), or lock out all compressed air supply to filter
housing.
Depressurize filter by loosening the drain plug, but do not
remove the drain plug. Leave drain cracked open until all
pressure is out of filter housing and bowl is removed.
1.
2.
WARNING
DO NOT UNSCREW FILTER BOWL FROM HEAD UNTIL
VESSEL IS COMPLETELY DEPRESSURIZED.
Follow the filter instruction manual included with filter housing
to disassemble the filter.
Remove used element and discard.
Remove new element from packaging. Check to make sure
that o-ring is properly positioned in endcap and has been
lightly greased.
Grasp clean element by bottom endcap and install it in the filter
head.
Check o-ring in filter head. Replace if worn or damaged.
Clean and lubricate threads on bowl with light grease. This will
facilitate removal of bowl at next servicing.
Follow filter instruction manual to reassemble the filter.
Tighten the drain plug then slowly open inlet and outlet shutoff
valves. Close bypass valve (if provided). Filter is now in
service.
Monitor differential pressure regularly and replace element as
indicated. 3.
4.
5.
6.
7.
8.
9.
10.
11.
IMPORTANT
TO REDUCE ENERGY CONSUMPTION FROM EXCESSIVE
PRESSURE DROP AND MINIMIZE CHANCE OF CONTAMI-
NANT CARRYOVER, INSTALL NEW ELEMENT WHEN
PRESSURE DROP REACHES 10 PSID (EXCEPT GRADE
RD). INSTALL NEW RD ELEMENTS WHEN HYDROCAR-
BON VAPORS ARE FIRST DETECTED DOWNSTREAM OR
AT LEAST EVERY 6 MONTHS.