Bendix Commercial Vehicle Systems QRN-2 QUICK RELEASE VALVE 3/04 - Manual

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FIGURE 1 - QR-L ™ INLINE QUICK RELEASE VALVE
SD-03-906
Bendix ® QR-L ™ Inline Quick Release Valve
DESCRIPTION
The Bendix ® QR-L ™ quick release valve is similar to standard
quick release valves such as the QR-1 ™ , QR-N ™ , and
QRN-2 ™ . Its purpose is to “speed up” the release of air from
air lines and devices it is attached to. Although primarily
intended to enhance air system performance by rapidly
exhausting supply or control air pressure from vehicle air
lines, it can be used in a variety of different applications. It
is uniquely suitable as an air system performance
enhancement due to its 0 psi crack and differential pressure.
Supply and delivery pressure is the same throughout the air
pressure range. A typical air system application for the
QR-L
™ valve is illustrated in figure 3.
The QR-L ™ valve is non-serviceable. It incorporates a single
supply and delivery port along with two exhaust ports. Two
versions of the QR-L
™ valve are available as illustrated in
figure 1. Male pipe threads at the supply port, on the direct
mount version, allow installation in another air device. A
1-1/8” machine thread on the exterior of the supply port and
a 3/8” PT female air connection on the second version
permits installation in a bracket or a hole in a frame or
cross member on the vehicle.
An arrow, embossed in the cast body, indicates the flow of
air through the valve, from supply to delivery.
Supply port: 1/2"-Male P.T. or 3/8"-Female P.T.
Delivery ports: 1/2" Female P.T.
Weight: .6 lb.
Material: Die cast zinc
Operating pressure: 150 psi maximum
Operating temperature: -40° to 200° F
FIGURE 2 - QR-L ™ INLINE QUICK RELEASE VALVE
O-RING
3 AIR CHANNELS
(0 PSI CRACK &
DIFFERENTIAL)
CAP
SUPPLY
PORT
BODY
CRIMPED TO
CAP
BODY
DELIVERY
PORT
DIAPHRAGM
EXHAUST
DIAPHRAGM
EXHAUST
EXHAUST
DELIVERY
PORT
DELIVERY
PORT
NUT & STAR
WASHER
SUPPLY PORT
(FEMALE PIPE
THREAD)
SUPPLY PORT
(MALE PIPE
THREAD)
Direct Mount QR-L ™ Valve Frame or Bracket Mount QR-L ™ Valve
WRENCH
FLAT
WRENCH
FLAT