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SD-03-901

DESCRIPTION

The function of the quick release valve is to speed up the

exhaust of air from the air chambers. It is mounted close to

the chambers it serves. In its standard configuration the

valve is designed to deliver within 1 psi of control pressure to

the controlled device; however, for special applications the

valve is available with greater differential or zero hysteresis.

QR-1

™

valves also come with optional noise reducing foam

crosses or silencers.

Reference Figure 1, two styles of quick release valves are

available and are functionally the same; the QRV

™

valve,

which is of older design and utilizes a spring and spring

seat, and the QR-1

™

valve, which in its standard configura-

tion does not employ a spring or spring seat.

(Note: QR-1

™

valves with a pressure differential employ a

spring and spring seat.)

Porting consists of one supply port, two delivery ports and

one exhaust port.

OPERATION

When a brake application is made, air pressure enters the

supply port; the diaphragm moves down, sealing the

exhaust. At the same time, air pressure forces the edges of

the diaphragm down and air flows out the delivery ports.

When air pressure being delivered (beneath the diaphragm)

equals the pressure being delivered by the brake valve (above

the diaphragm), the outer edge of the diaphragm will seal

against the body seat. The exhaust port is still sealed by

the center portion of the diaphragm when the supply air is

released; the air pressure above the diaphragm is released

back through the brake valve exhaust; air pressure beneath

the diaphragm forces the diaphragm to rise, opening the

exhaust, allowing delivery air to exhaust.

FIGURE 1

Bendix

QRV

™

and QR-1

™

Quick Release Valves

QR-1

™

Quick Release Valve

QRV

™

Quick Release Valve

Supply Port

Delivery Port

Exhaust Port

O-Ring

Cover

Spring

Supply Port

Delivery

Port

Delivery Port

O-Ring

Cover

Body

QR-1

™

Quick

Release Valve

Diaphragm

QRV

™

Quick

Release Valve

Exhaust Port

Diaphragm

1 2 3 4

Résumé du contenu

Page 1 - Quick Release Valve

1SD-03-901DESCRIPTIONThe function of the quick release valve is to speed up theexhaust of air from the air chambers. It is mounted close tothe chamber

Page 2 - PERSONAL INJURY OR DEATH:

2PREVENTIVE MAINTENANCEImportant: Review the Bendix Warranty Policy beforeperforming any intrusive maintenance procedures. A warrantymay be voided if

Page 3

3INSTALLINGMount the valve with exhaust port pointing down; securelytighten mounting bolts.Connect the air lines to valve (brake valve application lin

Page 4

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BENDIX BW1442 Manuel d'utilisateur

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Résumé du contenu

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