Bendix-commercial-vehicle-systems TW-N TWO WAY CONTROL VALVE User Manual download pdf

SD-03-3672

Bendix

TW-N

™

Two Way Control Valve

FIGURE 1

DESCRIPTION

The TW-N

™

valve is a manually operated two position control

valve. It is normally dash or panel mounted and incorporates

a manually operated control lever. The TW-N

™

valve was

designed for use as a control for non-modulating air system

devices.

With the exception of the plunger return spring, lever pin

and lever reinforcement the TW-N

™

valve is constructed of

nonmetallic material.

The single supply port and delivery port are both tapped with

a 1/8" female pipe thread to accommodate air connections.

A single .26" (6.6 mm) O.D., unthreaded exhaust nipple is

located on the side and midway down the valve body. Each

port is identified with embossed letters; SUP for supply,

DEL for delivery and EXH for the exhaust.

The TW-N

™

valve is generally mounted using two of the four

mounting holes that are provided. All four mounting holes

are tapped with a 10-24 thread.

The TW-N

™

valve is interchangeable with the TW-1

™

two-way

control valve with respect to vehicle fit and function. Dial

plates and attaching screws can be used interchangeably

on either the TW-N

™

and TW-1

™

valves, however other detail

components are not interchangeable.

OPERATION

With the TW-N

™

valve in the exhaust position, air at the

supply port is prevented from flowing to the delivery port by

the lower o-ring on the plunger. (Figure 2) When the lever is

moved to the delivery position, (Figure 3) the return spring

and air pressure moves the plunger allowing the lower plunger

o-ring to slide past the delivery port passage. With the plunger

in this position (Figure 3), air flows from the supply port and

out the delivery port.

DELIVERY

PORT

1/8” P.T.

MOUNTING

HOLE (4)

SUPPLY

PORT

1/8” P.T.

EXHAUST

.26” O.D.

(6.6 MM)

LEVER

LEVER PIN

DELIVERY

PORT

SUPPLY

PORT

SPRING

O-RING (SMALL)

BODY

O-RING (LARGE)

PLUNGER

1 2 3

Summary of Contents

Page 1 - Two Way Control Valve

1®SD-03-3672Bendix® TW-N™ Two Way Control ValveFIGURE 1DESCRIPTIONThe TW-N™ valve is a manually operated two position controlvalve. It is normally das

Page 2 - PERSONAL INJURY OR DEATH:

2Moving the lever to the exhaust position, forces the plungertoward the supply port, causing the lower plunger o-ring toslide past the delivery port p

Page 3 - INSTALLING

33. Do not attempt to install, remove, disassemble orassemble a component until you have read andthoroughly understand the recommendedprocedures. Use