BENDIX SD-03-906 Manuel D’Utilisation

®

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

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)

WRENCH

FLAT

WRENCH

FLAT