Bendix-commercial-vehicle-systems QR-1 QUICK RELEASE VALVES 5/10 Instrukcja Użytkownika Pobierz pdf

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 conﬁ guration 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

conﬁ guration 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 ﬂ ows 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

Podsumowanie treści

Strona 1 - Quick Release Valve

1SD-03-901DESCRIPTION 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 cham

Strona 2 - INJURY OR DEATH:

2PREVENTIVE MAINTENANCE Important: Review the Bendix Warranty Policy before performing any intrusive maintenance procedures. The warranty may be voide

Strona 3 - ASSEMBLY

3DISASSEMBLY QRV™ VALVE 1. Using a wrench on square portion of exhaust port, remove the cover.2. Remove the spring, spring seat and diaphragm. Remov

Strona 4

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