BENDIX BW1680 Manuel D’Utilisation

®

SR-5

™

 TRAILER SPRING BRAKE VALVE

*SHOWN WITH OPTIONAL ANTI-COMPOUNDING COVER

SR-5

™

 VALVE

IDENTIFICATION

HOLE

1/4” NPT TRAILER

SERVICE

1/4” NPT

TRAILER SUPPLY

EXHAUST

COVER*

1/4” NPT

SERVICE

RESERVOIR

(2)

3/8” NPT

DELIVERY (4)

1/2” OR 3/4” NPT

SPRING BRAKE

RESERVOIR

PRESSURE

PROTECTION

VALVE

The SR-5

™

 valve is a reservoir-mounted trailer valve that can

control up to four spring brake actuators during parking or
emergency applications. It has the following capabilities:

• Automatically applies trailer spring brakes in the event of

a breakaway or trailer supply line failure.

• Protects trailer reservoir(s) air pressure in the event of a

breakaway or trailer supply line failure.

• Allows no automatic trailer spring brake application with

air pressure loss in trailer reservoir(s).

• Allows the trailer spring brakes to be applied and released

repeatedly with a failed trailer reservoir(s):

• Optional anti-compounding-prevents an overriding service

brake signal while the trailer supply line is at atmospheric
pressure.

• Does not allow service system charging if a failure occurs

in the parking brake circuit.

1 - 1/2" or 3/4" NPT Spring Brake Reservoir Mounting

(SPR BK RES)

1 - 1/4"-18 NPT Trailer Supply (TRL SUP)

1 - 1/4"-18 NPT Trailer Service (TRL SER)

4 - 3/8"-18 NPT Delivery (DEL)

2 - 1/4"-18 Service Reservoir (SERV RES)

1 - Exhaust (EXH)

The SR-5

™

 valve appears very similar to the SR-2

™

 valve.

Both valves consist of a die-cast aluminum body and cover,
pressure protection valve, and reservoir-mounting nipple.
However, Figure 1 notes the distinguishing characteristic of
the SR-5

™

 valve–a hole drilled into the flat surface between

the pressure protection valve and the body.