BENDIX SD-08-2418 Посібник - Сторінка 4

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1. Troubleshooting Chart

Oil Coalescing Filter

(Bendix

AD-IS

PuraGuard

coalescing air dryer)

Delivery

Purge

Control

Channel

Governor

Unloader

Port

Supply

Port

Purge

Valve

(closed)

Engine

Compressor

Figure 2 - Bendix

AD-IS

CHARGE CYCLE

(Refer to Figure 2.)

When the compressor is running loaded (compressing air),

compressed air flows through the compressor discharge

line to the inlet (1/IN) port of the air dryer body. The

compressed air often includes contaminates such as oil,

oil vapor, water, and water vapor.

Traveling through the discharge line and into the air dryer,

the temperature of the compressed air falls, causing

some of the contaminants to condense and drop to the

bottom of the air dryer and purge valve assembly. These

contaminants are ready to be expelled at the next purge

cycle. The air then flows into the desiccant cartridge,

where it flows through an oil separator – or coalescing

filter if equipped with a Bendix

cartridge – which removes water in liquid form, as well as

liquid oil and solid contaminants.

Desiccant

Bed

oil

Check

Valve

(open)

Turbo

Safety

Cut-Off

Valve

Secondary

(open)

Turbo

Port

(SEC)

See

Note 1

Air Dryer & Reservoir System Charge Cycle

PuraGuard

oil coalescing

Pressure

Protection

Valves

Primary

Port (PRI)

Primary

Reservoir

Auxiliary Ports

(To Accessories)

Air then flows into the desiccant drying bed and becomes

progressively drier as water vapor adheres to the desiccant

material in a process known as adsorption.

Dry air exits the desiccant cartridge, through the center

of the base assembly, then flows to the delivery check

valve, through an orifice, and into the purge reservoir. The

delivery check valve opens, supplying air to the pressure

protection valves (A) through (D) simultaneously, the

safety valve, and also to the reservoir port of the attached

governor. The purge reservoir fills, storing air that will be

used to regenerate the desiccant during the purge cycle.

This air is available to supply downstream components

during the charge mode.

When the air pressure reaches approximately 106 psi, the

four pressure protection valves will open and air will be

supplied to the primary reservoir, secondary reservoir, and

Purge

Orifice

Reservoir

Purge

Reservoir

Drain Valve

Secondary

Reservoir

Diagram shows all pressure

protection valves open