BENDIX SR-5 TRAILER SPRING BRK VALVE Handbuch - Seite 5
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SERVICE
RELAY
VALVE
FIGURE 7 OPTIONAL ANTI-COMPOUNDING
Note that pressure protection valve C will open if trailer supply
air is greater than 70 psi. But check valves B and D will not
open unless release pressure from the tractor exceeds trailer
reservoir pressure.
ANTI-COMPOUNDING (SEE FIGURE 7)
The SR-5
™
valve has an optional anti-compounding feature.
(See Figure 7.) A single check valve in the SR-5
prevents brake compounding (simultaneous spring brake and
service brake application), which creates extra load on
foundation brake components.
If a trailer service application is being made and at the same
instant a park application is made, air in the service line
flows through single check valve E in the SR-5
Pressure is maintained on the control piston, while air also
flows out the trailer supply line and exhausts through the
tractor protection control. Future compounding is prevented
by the closed tractor protection valve.
CHECK
VALVE F
SERVICE/SPRING
BRAKE
RESERVOIR
CONNECTION
™
valve cover
™
valve cover.
TRAILER SERVICE
ANTI-COMPOUNDING
TRAILER SUPPLY
EXHAUST
DELIVERY
SPRING BRAKE
CHAMBER
LINE
CHECK
VALVE E
5