Bendix Commercial Vehicle Systems SR-7 SPRING BRK MODULATING VLV 1/11 - Manual (Page 2)

2
OPERATION
The operation guidelines shown in this manual represent
the relay valve based Bendix
® SR-7 ® (refer to system
schematic shown in fi gure 3). A quick release based valve
functions similarly to the relay valve based version with
PARK CONTROL
PORT
SUPPLY PORT
INLET / EXHAUST
VALVE
MAIN PISTON
CONTROL PISTON
SPRING GUIDE
RETAINING RING
MAIN PISTON SPRING
SPACER
STATIC PISTON
STATIC PISTON
SPRING
O-RING
O-RING
O-RING
UPPER BODY
VALVE RETAINER
SPRING
LOWER BODY
SPRING
CHECK VALVE
GUIDE
O-RING
O-RING
DOUBLE CHECK VALVE
O-RING
CHECK VALVE
COVER
DIAPHRAGM WASHER
RETAINING RING
VALVE SEAT
DIAPHRAGM
#10 TORX HEAD SCREW
RETAINING RING
O-RING
O-RING
EXHAUST
PORT
FIGURE 2 - SECTIONAL VIEW OF SR-7 ® SPRING BRAKE MODULATING VALVE USED IN RELAY VALVE APPLICATIONS
IN-LINE SINGLE CHECK
VALVE
SPRING
BALL CHECK
VALVE
O-RING
O-RING
O-RING
O-RING
LOWER VALVE GUIDE
1/4-20 MACHINE
SCREWS
the exception that all air delivered to spring brakes passes
through the park control port through the in-line single
check valve. The SR-7
® quick release style can be easily
identifi ed by the pipe plug in the supply port of the valve.