BENDIX SD-08-2418 manual Purge Cycle Refer to Figure

Page 5

DESICCANT

BED

OIL COALESCING FILTER

(BENDIX® AD-IS®PURAGUARD®

OIL COALESCING AIR DRYER)

 

 

PURGE

PURGE

 

 

RESERVOIR

 

DELIVERY

ORIFICE

 

 

PURGE

CHECK VALVE

PRESSURE

 

(CLOSED)

 

CONTROL

 

PROTECTION

 

 

VALVES

 

CHANNEL

 

 

 

 

 

GOVERNOR

 

 

 

UNLOADER

 

 

 

PORT

 

 

 

SUPPLY

PURGE VALVE

 

 

A

B

C

D

PORT

 

 

 

 

 

 

 

(OPEN)

 

 

PRIMARY

 

 

 

 

 

TURBO

SAFETY

 

 

 

 

 

PORT (PRI)

 

 

PURGE

 

 

CUT-OFF

VALVE

 

 

 

 

ENGINE

VALVE

SECONDARY

 

 

RESERVOIR

 

(CLOSED)

 

 

DRAIN VALVE

 

TURBO

 

PORT (SEC)

 

 

 

 

 

 

 

 

 

 

PRIMARY

 

 

COMPRESSOR

EXHAUST

 

RESERVOIR

SECONDARY

 

 

 

 

 

 

 

RESERVOIR

 

 

 

 

 

 

AUXILIARY PORTS

 

 

 

 

 

 

(TO ACCESSORIES)

DIAGRAM SHOWS ALL PRESSURE

PROTECTION VALVES OPEN.

FIGURE 3 - BENDIX® AD-IS®AIR DRYER AND RESERVOIR SYSTEM PURGE CYCLE

accessories. If the pressure protection valves are preset 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 and 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 and reservoir system.

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 Feature 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.

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Contents SD-08-2418 General Safety Guidelines Description Charge Cycle Refer to Figure Purge Cycle Refer to Figure Preventive Maintenance Heater and Thermostat Connector General Braking System Protection Delivery Check Valve Cleaning Procedure Log-on and Learn from the Best Page Symptom Cause Remedy Replace the safety valve Refer to paragraph 5 of the Operation and Leakage Tests for Symptom Cause Remedy

SD-08-2418 specifications

The BENDIX SD-08-2418 is a sophisticated air brake system designed for heavy-duty trucks and commercial vehicles. This unit is widely recognized for its reliability and performance in demanding driving conditions. Engineered to enhance safety and control, the SD-08-2418 is particularly popular among fleet operators and vehicle manufacturers.

One of the main features of the BENDIX SD-08-2418 is its advanced modulation technology, which allows for optimal brake application and release. This technology ensures a smooth and controlled braking experience, reducing the risk of wheel lock-up and ensuring that drivers maintain steering control during hard stops. This is crucial for maintaining safety when operating large vehicles under heavy loads.

The SD-08-2418 also incorporates a lightweight design, which contributes to improved fuel efficiency and overall vehicle performance. The unit is constructed from high-quality materials that not only reduce weight but also enhance durability and longevity. This is vital for trucks that endure rigorous use across varied terrains and conditions.

Another notable characteristic of the BENDIX SD-08-2418 is its compatibility with advanced electronic braking systems (EBS). This compatibility allows for efficient integration with modern vehicle technologies such as anti-lock braking systems (ABS) and traction control systems. By enabling the seamless exchange of information between the braking system and vehicle control units, the SD-08-2418 enhances the overall safety and performance of the truck.

Moreover, the BENDIX SD-08-2418 features a user-friendly installation process, which is essential for minimizing downtime during maintenance. Its straightforward design allows technicians to replace or service the unit with ease. This reduces operational costs and promotes efficient fleet management.

In conclusion, the BENDIX SD-08-2418 is a state-of-the-art air brake system that combines advanced features, reliable performance, and ease of installation. Its innovative technology and lightweight design make it a top choice for commercial vehicle operators who prioritize safety, efficiency, and durability in their braking systems. As the demands on modern vehicles evolve, the BENDIX SD-08-2418 remains a key player in the field of heavy-duty braking solutions.
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