Troubleshooting guide

27
www.bendix.com 1-800-AIR-BRAKE (1-800-247-2725)
Miscellaneous Control Valves
Inversion valves are air operated control valves, and
unlike most control valves are normally open, i.e.
without control pressure the supply is common to the
delivery. The inversion valve is closed by using air
pressure from another source and is primarily used in
emergency or parking brake systems which operate
with air from an isolated reservoir. The valve is also
used in interlocking and sequencing applications, where
the operation of components must take place in specific
sequence.
The TR-2
™
valve was designed primarily for use in
early DD3
®
safety actuator installations. It is equipped
with a threaded body and nut for mounting. Now used
extensively in DD3
®
actuator systems, it is also used in
interlocking applications. Two mounting holes are
provided.
The TR-3
™
valve is similar in function to the TR-2
™
valve. A specialized version of the TR-3
™
valve is
available with an internal channel connecting supply
pressure to control, typically with the external control
port plugged.
The SV-1
™
synchro valve is an air signal-operated,
non-graduating (on-off) control valve offered in a variety
of pressure settings and is used to delay or sequence
the action of other pneumatic devices.
When used in non-automatic applications it controls a
separate air system circuit.
The SV-1
™
valve can also be used as an automatic
controller (when its supply and control are connected).
The valve will open, close and exhaust automatically as
the control and supply pressures rise or fall.
The PP-5
™
push pull control valve is a pressure
sensitive, on - off control valve. It is used in conjunction
with vehicle torque converter systems, engine speed
control systems and some parking brake systems. In
addition to automatic exhaust and manual control, the
PP-5
™
valve employs a pilot air release feature
(interlock) which will allow the valve to be exhausted
by applying a low pressure signal from another control
valve to the PP-5
™
control port.
The RD-3
™
is a manually operated on-off control valve.
The valve is spring loaded and will remain in the exhaust
(button out) position. Constant manual force is
required to cause the valve to deliver air. The RD-3
™
control valve is primarily used as an emergency brake
release control valve.
TR-2
™
Valve
TR-3
™
Valve
SV-1
™
Synchro
Valve
Miscellaneous Control Valves
PP-5
™
Push-Pull
Control
Valve
RD-3
™
Control
Valve