1
SD-03-2202*
of the shuttle or disc will reverse if the pressure levels are
reversed. Double Check Valves are designed so that the
shuttle or disc can never impede the backflow of air in the
exhaust mode.
Figure 3 (see page 2) illustrates a typical use of a Double
Check Valve to control a given device, such as trailer brakes,
from either of two control sources.
Figure 4 (see page 2) illustrates a typical use of a Double
Check Valve to supply air to a system or systems from
either of two separate sources, whichever is at the greater
pressure level. In this type of installation the pressure
differential to which the valve is subjected may under certain
conditions be minimal. It is therefore suggested that
performance of the Double Check Valve will be optimized if
it is mounted in the horizontal position.
PREVENTIVE MAINTENANCE
Every 3600 operating hours, 100,000 miles, or yearly,
disassemble, clean and inspect all parts. Install new parts
if they show signs of wear or deterioration.
DESCRIPTION
Double Check Valves are used in an air brake system to
direct a flow of air into a common line from either of two
sources, whichever is at the higher pressure. They may be
used for directing air flow for specific functions or to select
the higher pressure of either of two sources of air as a sup-
ply source.
AlliedSignal manufactures two types of Bendix Double Check
Valves: shuttle and disc. Although the valves are somewhat
different physically, the same function is performed by both
types. The difference in the design of the two valves is that
the shuttle type has a movable shuttle to seal off the lower
pressure source, whereas the disc type has a movable disc.
OPERATION
As air under pressure enters either end of the Double Check
Valve (inlet port) the moving shuttle or disc responds to the
pressure and seals the opposite port, assuming it is at a
lower pressure level than the other. The air flow continues
out the delivery port of the Double Check Valve. The position
DOUBLE CHECK VALVES
FIGURE 1 -
DOUBLE CHECK VALVE (SHUTTLE TYPE)
FIGURE 2 -
DOUBLE CHECK VALVE (DISC TYPE)
DELIVERY
SUPPLY
SUPPLY
SHUTTLE
GUIDE
BODY
O-RING
SUPPLY
DELIVERY
SHUTTLE
VALVE
VALVE
DISC
VALVE
GUIDE
BODY
CAP
O-RING
DELIVERY
SUPPLY
DELIVERY
CAP
*FORMERLY SD-03-67
Summary of Contents for LE MIRAGE XLII
Page 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1553 ...
Page 2: ......
Page 12: ...Section 00 GENERAL INFORMATION 10 PA1553 FIGURE 13 METRIC US STANDARD CONVERSION TABLE 00005 ...
Page 13: ...Section 00 GENERAL INFORMATION PA1553 11 FIGURE 14 CONVERSION CHART 00006 ...
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Page 131: ...section01f tif 1700x2164x2tiff ...
Page 132: ...section01f tif 1700x2164x2tiff 2 ...
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Page 142: ...section01f tif 1700x2164x2tiff 12 ...
Page 143: ...The ONLY Motor Coach Power Choice ...
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Page 185: ...Section 04 EXHAUST SYSTEM PA1553 3 FIGURE 2 EXHAUST SYSTEM INSTALLATION W5 04013 ...
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Page 345: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12 ...
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Page 492: ...Section 12 BRAKE AND AIR SYSTEM PA1553 20 FIGURE 38 AIR OPERATED BRAKING SYSTEM W0 WE ...
Page 493: ...Section 12 BRAKE AND AIR SYSTEM PA1553 21 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5 ...
Page 500: ...Section 12 BRAKE AND AIR SYSTEM PA1553 28 FIGURE 46 ABS 4S 4M CONFIGURATION ...
Page 528: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA ...
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Page 1004: ...PROCEDURE NO PR00044 REVISION 00 Page 2 of 2 Slide out ...
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Page 1165: ...Section 22 HEATING AND AIR CONDITIONING PA1553 19 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP ...
Page 1201: ...Section 22 HEATING AND AIR CONDITIONING PA1553 55 FIGURE 64 HEATER LINE SHUTOFF VALVES WE W0 ...
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Page 1209: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R ...
Page 1210: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT ...
Page 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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Page 1305: ...Section 26 XLII SLIDE OUT PA1553 11 ...
Page 1306: ...Section 26 XLII SLIDE OUT PA1553 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION ...