Bendix Commercial Vehicle Systems R-14 RELAY VALVES 5/10 - Manual

1
Bendix ® R-12 ® & R-14 ® Relay Valves
DESCRIPTION
The relay valve in an air brake system functions as a relay
station to speed up the application and release of the
brakes. The valve is normally mounted at the rear of the
vehicle in proximity to the chambers it serves. The valve
operates as a remote controlled brake valve that delivers
or releases air to the chambers in response to the control
air delivered to it from the foot brake valve or other source.
The R-12 ® and R-14 ® relay valves are designed for either
reservoir or frame mounting. A universal mounting bracket is
furnished that permits easy interchange with other Bendix
®
relay valves. Both valves are available in the two body styles
illustrated in Figure 1. The R-14
® valve differs from the
R-12 ® valve in that it incorporates a quick release and anti-
compounding feature located above its horizontal service
port. The R-14
® valve’s anti-compound feature allows it to
FIGURE 1 - EXTERIOR VIEWS
EXTERIOR R-14H EXTERIOR R-12H
SERVICE (1)
SUPPLY (2) DELIVERY
SERVICE (1)
DELIVERY
SUPPLY (2)
EXTERIOR R-12V EXTERIOR R-14V
SD-03-1064
DELIVERY DELIVERY
SUPPLY