1
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 one (1) psi of control
pressure to the controlled device; however, for special
applications the valve is available with greater differential
pressure designed into the valve.
Reference Figure 1, two styles of Quick Release Valves are
available and are functionally the same; the QR valve, which
is of older design and utilizes a spring and spring seat, and
the QR-1 valve, which in its standard configuration does not
employ a spring or spring seat.
(Note: AR-1 Valves with a pressure differential employ a spring
and spring seat. )
Porting consists of one (1) brake valve port, two (2) delivery
ports and one ( 1 ) exhaust port.
OPERATION
When a brake application is made, air pressure enters the
brake valve 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 port.
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 brake valve
application is released; the air pressure above the diaphragm
is released back through the brake valve exhaust; air pres-
sure beneath the diaphragm forces the diaphragm to rise,
opening the exhaust, allowing air in the chambers to ex-
haust.
PREVENTIVE MAINTENANCE
Every 12 months, 100,000 miles or 3600 operating hours;
disassemble valve, wash metal parts in mineral spirits, wipe
rubber parts dry. It is recommended that all rubber parts be
replaced. Inspect all parts and replace any part showing
signs of wear or deterioration.
OPERATING AND LEAKAGE TESTS
While holding a foot brake valve application:
FIGURE 1
QR AND QR-1 QUICK RELEASE VALVES
*Formerly SD-03-69
QR-1 VALVE
QR VALVE
Brake Valve
Port
Brake Chamber
Port
Brake Chamber
Port
Exhaust Port
Diaphragm
O-Ring
Cover
Spring
Brake Valve
Port
Brake Chamber
Port
Brake Chamber
Port
O-Ring
Cover
Body
QR-1 Valve
Diaphragm
QR Valve
Exhaust Port
Содержание LE MIRAGE XLII
Страница 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1553 ...
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Страница 13: ...Section 00 GENERAL INFORMATION PA1553 11 FIGURE 14 CONVERSION CHART 00006 ...
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Страница 419: ...SPICER SPECIALITY AXLE DIVISION place product photo here SERVICE MANUAL GENERAL INFORMATION NDS Axle range ...
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Страница 438: ...Page No 12 NDS2 issue A Spicer SpecialityAxle Division Technical Publications Spicer Speciality Axle Division ...
Страница 464: ...Page No 18 Manual No NDS8 Spicer Speciality Axle Division Technical Publications Spicer Speciality Axle Division TP1193 ...
Страница 492: ...Section 12 BRAKE AND AIR SYSTEM PA1553 20 FIGURE 38 AIR OPERATED BRAKING SYSTEM W0 WE ...
Страница 493: ...Section 12 BRAKE AND AIR SYSTEM PA1553 21 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5 ...
Страница 500: ...Section 12 BRAKE AND AIR SYSTEM PA1553 28 FIGURE 46 ABS 4S 4M CONFIGURATION ...
Страница 528: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA ...
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Страница 1162: ...Section 22 HEATING AND AIR CONDITIONING PA1553 16 FIGURE 16 REFRIGERANT CIRCUIT CENTRAL SYSTEM 22247 ...
Страница 1165: ...Section 22 HEATING AND AIR CONDITIONING PA1553 19 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP ...
Страница 1186: ...Section 22 HEATING AND AIR CONDITIONING PA1553 40 FIGURE 42 REFRIGERANT CIRCUIT SMALL SYSTEM 22336 ...
Страница 1191: ...Section 22 HEATING AND AIR CONDITIONING PA1553 45 FIGURE 50 CENTRAL HEATING SYSTEM COMPONENTS 22338 ...
Страница 1201: ...Section 22 HEATING AND AIR CONDITIONING PA1553 55 FIGURE 64 HEATER LINE SHUTOFF VALVES WE W0 ...
Страница 1202: ...Section 22 HEATING AND AIR CONDITIONING PA1553 56 FIGURE 65 SMALL HEATING SYSTEM COMPONENTS 22337 ...
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Страница 1209: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R ...
Страница 1210: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT ...
Страница 1233: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R ...
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Страница 1305: ...Section 26 XLII SLIDE OUT PA1553 11 ...
Страница 1306: ...Section 26 XLII SLIDE OUT PA1553 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION ...