BENDIX QRN-2 QUICK RELEASE VALVE User Manual

®
FIGURE 1 - QRN-2
™
QUICK RELEASE VALVE
EXHAUST
COVER
EXHAUST
DELIVERY
SUPPLY
DELIVERY
SUPPLY
BODY
BODY
DELIVERY
PIECE
NUMBER, DATE
CODE, AND
T.M.C.
IDENTIFICATIONS
STAMPED
HERE
1.50"
DESCRIPTION
The Bendix
®
QRN-2
™
quick release valve is a lightweight,
nonmetallic quick release valve. It is designed to “speed
up” the release of air from the devices it is attached to. In its
standard configuration the valve is designed to deliver within
1 psi of control pressure. However, for special applications
the valve is available with zero hysteresis.
Port Embossed I.D.
Supply SUP 1
Delivery DEL 2
Exhaust EXH 3
FRONT AXLE
BRAKE
CHAMBER
FIGURE 3 - PARTIAL SYSTEM SCHEMATIC WITH QRN-2
™
QUICK RELEASE VALVE
FIGURE 2 - QRN-2
™
QUICK RELEASE VALVE SECTIONAL
VIEW
DUAL BRAKE
VALVE
QRN-2
™
VALVE
SUPPLY
BRAKE VALVE
SECONDARY
CIRCUIT
DELIVERY
DELIVERY
DELIVERY
SUPPLY
RESERVOIR
SECONDARY
CIRCUIT
RESERVOIR
Supply port: 1/2"-14 P.T. or 3/8"-18 P.T.
Delivery ports: 3/8"-18 P.T.
Weight: .3 lb.
Material: Molded black reinforced nylon 6
Operating pressure: 150 psi maximum
Operating temperature: -40° to 180° F
Bendix
®
QRN-2
™
Quick Release Valve
SD-03-907
EXHAUST
DELIVERY
DELIVERY
SUPPLY
DIAPHRAGM

BENDIX QRN-2 QUICK RELEASE VALVE Specifications

General

Category	Control Unit
Valve Type	Quick Release Valve
Brand	BENDIX
Material	Aluminum
Manufacturer	Bendix
Function	Quick release of air pressure
Application	Air brake systems

Summary

Bendix QRN-2 Quick Release Valve

Valve Description

Describes the Bendix QRN-2™ quick release valve, its design, and standard configuration.

Port Identification Markings

Details the embossed port identification markings on the valve.

Valve Balance Mode

Explains the balanced mode of the QRN-2™ valve operation.

Valve Release Operation

Details the release function of the QRN-2™ valve.

Critical Safety Precautions

Crucial safety instructions and precautions for operating or working on the vehicle.

Preventive Maintenance Guidelines

Provides guidelines for routine inspection and maintenance of the QRN-2™ valve.

Service Checks and Inspections

Outlines procedures for inspecting the valve and connected air lines for damage or leaks.

Operational and Leakage Tests

Details tests to verify valve functionality and check for air leaks.

Removal Procedure

Instructions for safely removing the QRN-2™ valve from the vehicle.

Installation Procedure

Steps for installing the QRN-2™ valve onto the vehicle.