1
®
Bendix
®
SR-7
™
Spring Brake Modulating Valve
SD-03-9043
DESCRIPTION
The Bendix
®
SR-7
™
spring brake modulating valve is used in
conjunction with a dual air brake system and spring brake
actuator and performs the following functions:
1. Provides a rapid application of the spring brake actuator
when parking.
2. Modulates the spring brake actuator application using
the dual brake valve should a primary failure occur in
the service brake system.
3. Prevents compounding of service and spring forces.
The valve has one park control, one service control, one
supply, one balance, four delivery NPTF ports, and an
exhaust port protected by an exhaust diaphragm. The valve
incorporates two mounting studs for mounting the valve to
the frame rail or cross member (where applicable).
MOUNTING
STUDS (2)
EXHAUST
42
CONTROL
PORT
2
DELIVERY
1
SUPPLY
PORT
41
BALANCE
PORT
FIGURE 1 - EXTERIOR VIEW
3
EXHAUST
2
DELIVERY
4-1
PARK CONTROL
(FROM DASH
VALVE)
PIPE PLUG
(INCLUDED IN
QUICK RELEASE
VALVE
APPLICATIONS)
