BENDIX SD-08-2418 Посібник - Сторінка 5

Переглянути онлайн або завантажити pdf Посібник для Осушувач повітря BENDIX SD-08-2418. BENDIX SD-08-2418 17 сторінок.

Друкувати сторінку

1. Troubleshooting Chart

Oil Coalescing Filter

(Bendix

AD-IS

PuraGuard

coalescing air dryer)

Purge

Control

Channel

Governor

Unloader

Port

Supply

Purge

Port

Valve

(Open)

Compressor

Figure 3 - Bendix

AD-IS

accessories. If the pressure protection valves are pre-set

to different values, the valves will open – in order of lowest

setting to highest setting – when charging a flat system.

The air dryer and purge reservoir will remain in the charge

cycle until the air brake system pressure builds to the

governor cut-out setting of approximately 130 psi.

PURGE CYCLE

(Refer to Figure 3.)

When air brake system pressure reaches the cut-out setting

of the governor, the governor unloads the compressor

activating the purge cycle of the air dryer & reservoir.

The governor unloads the compressor by allowing air

pressure to fill the line leading to the compressor unloader

mechanism. This suspends the delivery of compressed air

to the Bendix

AD-IS

air dryer & reservoir system.

Desiccant

Bed

oil

Delivery

Check

Valve

(open)

Safety

Turbo

Valve

Cut-Off

Valve

Engine

Secondary

(Closed)

Turbo

Port (SEC)

Exhaust

Air Dryer & Reservoir System Purge Cycle

Pressure

Protection

Valves

Primary

Port (PRI)

Primary

Reservoir

Auxiliary Ports

(To Accessories)

Similarly, the governor also supplies air pressure to the

air dryer. The pressure also moves the air dryer purge

piston down, opening the purge valve to atmosphere

and closing off the compressor air supply to the turbo

cut-off valve (covered in the Turbo Cut-off Valve section

of this document). Water and contaminants captured are

expelled immediately when the purge valve opens. In

addition, air – which was flowing through the desiccant

cartridge – changes direction and begins to flow toward

the open purge valve. Contaminants collected by the air

dryer are removed by air flowing from the purge reservoir

through the desiccant drying bed to the open purge valve.

The initial purge and desiccant cartridge decompression

lasts only a few seconds, evidenced by an audible burst

of air at the air dryer exhaust.

Purge

Reservoir

Orifice

Purge

Reservoir

Drain Valve

Secondary

Reservoir

Diagram shows all pressure

protection valves open