BENDIX BW1811 manual Turbo Cutoff Feature Refer to Figure

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OIL

SEPARATOR

DESICCANT

BED

PURGE

ORIFICE

PURGE

CONTROLVOLUME

PORT

PURGE

 

 

 

 

CONTROL

SUPPLY

 

 

 

LINE

 

 

 

PORT

 

 

 

 

 

 

 

GOVERNOR

 

 

 

DELIVERY

 

 

 

 

 

 

 

 

CHECK VALVE

 

 

 

 

(OLD STYLE

 

 

 

PURGE

SHOWN)

 

 

TURBO

DISCHARGE

COMPRESSOR

ENGINE

VALVE

 

TURBO

CUTOFF

EXHAUST

PORT

 

 

VALVE

 

 

FIGURE 5 - AD-IPINTEGRAL PURGE AIR DRYER PURGE CYCLE

PURGE

VOLUME

CONTROL

PORT

SUPPLY

PORT

TURBO

CUTOFF

VALVE

PURGE

VALVE

FIGURE 6 - AD-IPINTEGRAL PURGE AIR DRYER TURBO

CUTOFF

The actual reactivation of the desiccant drying bed begins as dry air flows from the purge volume through the purge orifice in the desiccant cartridge bolt, then through the center of the bolt and into the desiccant bed. Pressurized air from the purge volume expands after passing through the purge orifice; its pressure is lowered and its volume increased. The flow of dry air through the drying bed reactivates the desiccant material by removing the water vapor adhering to it. Generally 30 seconds are required for the entire purge volume of a standard AD-IPair dryer to flow through the desiccant drying bed.

The delivery check valve assembly prevents air pressure in the brake system from returning to the air dryer during the purge cycle. After the 30 second purge cycle is complete the desiccant has been reactivated or dried. The air dryer is ready for the next charge cycle to begin. However the purge valve will remain open and will not close until air brake system pressure is reduced and the governor signals the compressor to charge the system.

TURBO CUTOFF FEATURE (Refer to Figure 6)

The primary function of the turbo cutoff valve is to prevent loss of engine turbocharger air pressure through the AD-IPair dryer in systems where the compressor intake is

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Contents SD-08-2414 Function/ConnectionAD-IPDI Drop in AIR Dryer Model GeneralAD-IPINTEGRAL Purge AIR Dryer Charge Cycle Turbo Cutoff Feature Refer to Figure Preventive Maintenance Operation & Leakage Tests Side View Weatherproof Accordian TOP ViewMaintenance Kits Available Rebuilding the AD-IPAIR DryerDisassembly AD-IPAIR Dryer RemovalCleaning & Inspection Assembly34 35 36 DLU Style Purge Valve Old Style AD-IP End Cover Vertical Delivery Check Valve AD-IPAIR Dryer Installation Total Vehicle Reservoir Volume RequirementRetrofitting the AD-IPAIR Dryer Vehicle Application RequirementsConnecting the AIR Lines Vehicle PreparationLocating AD-IPAIR Dryer on Vehicle Compressor Discharge LineInstalling AD-IPAIR Dryer with Holset Compressor General Purge Exhaust LineStandard AD-IPAir Dryer Refer to B AD-IPDI Drop In Air Dryer Model Refer to CTesting the AD-IPAIR Dryer Wiring Remote Power & Local GroundAD-IPAIR Dryer Troubleshooting Chart Perform tests 1 to 6 in the order presentedAD-IPAIR Dryer Troubleshooting Chart Feedback Line Typical Drop-In Air Dryer End Cover Unloaded for a minimum of 30 seconds. This AD-IPAIR Dryer Troubleshooting Chart Check Valve Preventative Maintenance Section AD-IPAIR Dryer Troubleshooting Chart Low Air Use High Air UseAdditional Troubleshooting Information Conventional Supply System Integral Purge AIR DryerComplaints Common to the Charging & AIR Supply System Complaint Can Not Build System PressureTests Common to More than ONE Complaint Discharge plugged or restricted