BENDIX PURAGUARD SYSTEM FILTER Manual

®
Bendix PuraGuard
®
DESCRIPTION
The PuraGuard system filter is used to assist the
®
production of purified compressed air on high air use vehicles.
The PuraGuard system filter consists of a filter element
®
mounted in a die cast aluminum housing. The sump
housing contains a drain valve for maintenance. For ease
of serviceability, all maintenance kits do not require removal
of the PuraGuard system filter from its mounting on the
®
vehicle.
ONE SUPPLY & ONE DELIVERY PORT
(SEE ARROW SYMBOL ON PURAGUARD
SYSTEM FILTER TOP COVER FOR AIR FLOW)
MOUNTING
BRACKET
(2)
SUMP
HOUSING
EXTERIOR
VIEW
TOP
VIEW
SUPPLY
PORT
FIGURE 1 - PURAGUARD
System Filter
®
®
PURAGUARD
SYSTEM FILTER
HEAD
DRAIN VALVE
DELIVERY
PORT
SYSTEM FILTER
®
High air use vehicles (e.g. transit vehicles) may require the
air compressor to exceed its normal duty cycle. The resulting
high compressor discharge temperatures can allow oil
aerosols to pass through the air dryer, condensing
downstream in air system components.
The PuraGuard
and removes approximately 99% of oil aerosols. On vehicles
not using an air dryer, the PuraGuard
the supply ("wet tank") reservoir (see Figures 3 & 4).
OPERATION
GENERAL
Compressed air passes through the supply port of the
PuraGuard
®
center of the filter element. As the air passes through the
filter material, oil in liquid and aerosol form are removed and
collected in the sump. The air travels back up from the
sump, through the PuraGuard
and into the air system.
®
SUPPLY
PORT
O-RING
ELEMENT
SPRING
LOCATOR
FIGURE 2 - CUT-AWAY SHOWING AIR FLOW
system filter follows the air dryer in the system
®
(See Figure 2)
system filter and travels downward through the
® system filter delivery port
FILTER
system filter follows
®
DELIVERY
PORT
FILTER
ELEMENT
HAS
O-RING
INCLUDED
SPRING
DRAIN
PORT
1