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that close the valve except when the pin is depressed. Schrader valves are used in a wide variety of compressed gas and pressurized liquid applications such as small torch and grill cylinders, and air shocks. Schrader valves are also viewed as more complex (requiring two seals over one). They weigh 4 to 5 grams (0.14 to 0.18 oz) more than Presta valves.
483:
349:. Each goes by multiple names. Schrader valves are also known as American valves or car valves. Presta valves are also known as French valves, Sclaverand valves, and road bike valves. Dunlop valves are also known as German valves, English valves, Holland valves, Woods valves, flash valves, and alligator valves.
352:
Schrader valves are almost universal on car, truck, and motorcycle tires worldwide. Presta and Dunlop valves are mostly found on bicycle tubes. Both the
Schrader and the Presta types are effective for sealing high pressures. Their chief differences are that Schrader valves are larger and have springs
254:
All
Schrader valves used on tires have threads and bodies of a single standard size at the exterior end, so caps and tools generally are universal for the valves on all common applications. The core of the valve can be removed or tightened with a tool. Industrial Schrader valves are available in
125:
Schrader valve components (from left to right) the valve core closed (top) and open (bottom), the order of assembly, end view of stem without core and with core (top) and stem with the dust cap on (bottom). The core has a short outer thread which is screwed into the inner thread of the stem. The
367:
requires an adaptor, while a
Schrader-valved tube does not. Inflating at home or on the road requires either 6mm air chuck for Presta and Dunlop valves, or an 8mm chuck for Schrader valves. An important advantage of Schrader valves relative to Presta is that Schrader valves allow for quick air
297:
to prevent air from leaking from a faulty valve core. Simple caps without a seal do not reliably prevent leaks. Some metal caps are equipped with prongs to enable removing and replacing valve cores, thereby serving two functions: seal and emergency tool.
322:
161:. A small rubber seal located on the core keeps the fluid from escaping through the threads. Using the appropriate tools, a faulty valve core can be immediately extracted from the valve stem and replaced with a new one.
360:. Another disadvantage of the Schrader is that debris may be introduced into its spring-loaded pin, impairing inflation, whereas the Presta valve relies only on air pressure and a small knurled nut to keep it shut.
208:
systems where the ability to easily disconnect an air hose (even underwater) without the loss of tank air is critical. Schrader valves are also widely used in high-pressure hydraulic systems on
219:
use an internal valve identical to a
Schrader valve, but with a lever on top to enable quick release of the pressurized content. It is also the same thread specification used on the
200:; on bicycle air shock absorbers to allow adjustment of air pressure according to the rider's weight; for medical gas outlets within hospitals and some medical vehicles; and in the
356:
Schrader and Dunlop valve stems are 8 mm in diameter, whereas Presta valve stems are 6 mm, allowing
Prestas to be used on narrower, high-performance rims as on road
556:
301:
In refrigeration and air conditioning applications, the valve cap is considered to be the primary seal, with the
Schrader valve only being used for service access.
251:. In the center of the exterior end is a metal pin aligned with the long axis of the tube; the pin's end is approximately flush with the end of the valve body.
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A valve cap on a
Schrader valve prevents the entry of contaminants that may interfere with the sealing surfaces and cause leakage.
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used on virtually every motor vehicle in the world today. The
Schrader company, for which it was named, was founded in 1844 by
42:
193:; by plumbers conducting leak-down pressure tests on pipe installations; as a bleeding and test port on the fuel rail of some
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inside, both to prevent the cap from loosening and falling off due to vibration. These caps also serve as a
603:
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A Schrader valve consists of an externally threaded hollow cylindrical metal tube, typically nickel-plated
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146:. The original Schrader valve design was invented in 1891, and patented in the United States in 1893.
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With the advent of miniature electronics, Schrader valve stems with integrated transmitters for
181:. In addition to tube and tubeless tires, Schrader valves of varying diameters are used on many
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Inflating a bicycle tire equipped with a Presta or Dunlop valve at an automobile
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landing gear strut ... valve has an operating pressure from 0 to 2000 PSI.
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209:
656:"Presta Vs Schrader Valve | How To Choose Best Tire Valve | Primerbikes"
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pressure checks. Some chucks have dual orifices to inflate all three.
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Schrader-Bridgeport
International (North American English version)
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There are three valves used on tires worldwide: Schrader valves,
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of some old Leica, Yashica, and also Nikon F and F2 cameras.
18:
1292:
398:
Internal 5V1 thread: 0.209 in (5.309 mm) x 36 TPI (
255:
different diameters and valve core variants and are used in
153:
into which a valve core is threaded. The valve core is a
683:
377:
External 8V1 thread: 0.305 in (7.747 mm) x 32
281:
Metal, and some hard plastic valve caps, have a rubber
243:
Short (modern) core being opened to allow air to escape
189:
systems to allow servicing, including recharging with
557:"Mobile A/C service tip: mind the service port caps"
126:
visible outer thread of the stem holds the dust cap.
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491:(filed: January 9, 1893; issued: April 11, 1893).
49:. Unsourced material may be challenged and removed.
408: in or 0.7056 mm pitch; tap size 5v1-36)
561:Mobile Air Conditioning Society (MACS) Worldwide
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699:
8:
1211:European Tyre and Rim Technical Organisation
169:The Schrader valve is used on virtually all
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706:
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521:
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109:Learn how and when to remove this message
430:
579:"Service Port Caps—Small but Powerful"
503:"Valve Cores in Aviation Applications"
448:A Dictionary of Mechanical Engineering
7:
47:adding citations to reliable sources
16:Motor vehicle and bicycle tube valve
1254:Uniform Tire Quality Grading (UTQG)
501:Carpenter, Carol (September 2010).
337:Schrader valve stem with valve core
1431:Continuously variable transmission
14:
305:Schrader versus other valve types
149:The Schrader valve consists of a
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1709:
1699:
1277:
1276:
1266:
555:Schaeber, Steve (14 July 2014).
313:A Schrader valve advertisement,
268:tire pressure monitoring systems
23:
1110:Tire-pressure monitoring system
507:Light Aviation/Aviators Hotline
263:, and a variety of other uses.
34:needs additional citations for
325:Schrader valve advertisement,
235:Long (old) version of the core
1:
1466:Automated manual transmission
1100:Central Tire Inflation System
531:www.schraderinternational.com
654:Naveed, M. P. (2023-04-09).
1541:Semi-automatic transmission
1221:Tire Science and Technology
741:Low rolling resistance tire
391: in or 0.7938 mm
1777:
1378:Internal combustion engine
1695:
1677:Hybrid vehicle drivetrain
1566:Transmission control unit
1506:Limited-slip differential
1471:Electrorheological clutch
1330:
1262:
270:(TPMS) became available.
138:) is a type of pneumatic
1456:Dual-clutch transmission
630:"Inner Tube Valve Types"
1426:Constant-velocity joint
1062:Slip (vehicle dynamics)
1019:Lateral Force Variation
969:Pacejka's Magic Formula
949:Cold inflation pressure
608:Bike Packing Adventures
453:Oxford University Press
1406:Automatic transmission
1158:List of tire companies
1029:Traction (engineering)
1024:Radial Force Variation
604:"Bicycle Valves Types"
482:George H.F. Schrader,
338:
330:
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244:
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177:and most wider-rimmed
127:
1009:Tire load sensitivity
488:U.S. patent 0,495,064
336:
324:
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242:
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124:
1511:Locking differential
1446:Direct-shift gearbox
989:Self aligning torque
202:buoyancy compensator
43:improve this article
1756:American inventions
1536:Preselector gearbox
1516:Manual transmission
1115:Tire-pressure gauge
751:Michelin PAX System
327:National Geographic
1751:1891 introductions
1682:Electric generator
1587:Wheel hub assembly
1153:Tire manufacturing
984:Rolling resistance
395:; tap size 8v1-32)
339:
331:
319:
245:
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217:fire extinguishers
204:(BC) inflators of
128:
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1476:Epicyclic gearing
1345:Automotive engine
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979:Relaxation length
856:Formula One tyres
610:. 31 January 2021
527:"Schrader Valves"
445:(25 April 2013).
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111:
93:
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1761:1890s neologisms
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1580:Wheels and tires
1551:Torque converter
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1303:
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1279:
1272:Outline of tires
1270:
1085:Tire maintenance
1034:Treadwear rating
944:Circle of forces
866:Continental tire
806:Orange oil tires
796:Mud-terrain tire
776:All-terrain tire
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563:. Archived from
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533:. Archived from
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473:
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187:air conditioning
175:motorcycle tires
171:automobile tires
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58:"Schrader valve"
51:
27:
19:
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1571:Universal joint
1501:Hotchkiss drive
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1139:
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1014:Tire uniformity
974:Pneumatic trail
964:Ground pressure
959:Cornering force
925:
899:Siping (rubber)
870:
841:Motorcycle tyre
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712:
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567:on 3 June 2017.
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455:. p. 312.
443:Marcel Escudier
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365:filling station
358:racing bicycles
307:
291:mechanical seal
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144:August Schrader
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17:
12:
11:
5:
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1672:Electric motor
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1486:Friction drive
1483:
1481:Fluid coupling
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1372:Plug-in hybrid
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1231:Identification
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1193:Ozone cracking
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1173:Tire recycling
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999:Steering ratio
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919:Schrader valve
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811:Whitewall tire
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673:External links
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221:shutter button
215:Many domestic
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157:assisted by a
136:American valve
132:Schrader valve
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1736:Vehicle parts
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1383:Petrol engine
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1353:Diesel engine
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1203:Organizations
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1090:Tire rotation
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1078:
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1057:Groove wander
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954:Contact patch
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939:Camber thrust
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816:Aircraft tire
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295:hermetic seal
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99:February 2020
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60: –
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54:Find sources:
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38:
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32:This article
30:
26:
21:
20:
1624:Racing slick
1561:Transfer box
1531:Park-by-wire
1526:Parking pawl
1441:Differential
1416:Direct-drive
1398:Transmission
1388:Steam engine
1333:Part of the
1332:
1216:Tire Society
1130:Tire changer
1125:Bead breaker
1095:Bicycle pump
1004:Tire balance
918:
914:Presta valve
909:Dunlop valve
851:Racing slick
846:Tractor tire
831:Tubular tire
826:Bicycle tire
756:Airless tire
659:. Retrieved
649:
639:27 September
637:. Retrieved
633:
624:
612:. Retrieved
607:
598:
586:. Retrieved
582:
573:
565:the original
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539:. Retrieved
535:the original
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466:. Retrieved
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155:poppet valve
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53:
41:Please help
36:verification
33:
1602:Alloy wheel
1461:Drive wheel
1451:Drive shaft
1411:Chain drive
1244:Plus sizing
1168:Waste tires
1120:Direct TPMS
1105:Tire mousse
1077:Maintenance
1052:Aquaplaning
821:Tundra tire
801:Paddle tire
786:Knobby tire
736:Radial tire
588:5 September
439:Tony Atkins
329:April, 1921
191:refrigerant
1741:Air valves
1730:Categories
1687:Alternator
1335:Automobile
1324:Powertrain
1249:Tire label
1145:Life cycle
1067:Tramlining
994:Slip angle
931:Attributes
904:Valve stem
876:Components
861:Spare tire
791:Large tire
661:2023-05-28
541:2017-04-25
468:23 October
425:References
419:Inner tube
372:Dimensions
151:valve stem
140:tire valve
69:newspapers
1556:Transaxle
1521:Manumatic
1491:Gearshift
1363:Fuel cell
1239:Tire code
1188:Flat tire
1178:Tire fire
1135:Tire iron
1044:Behaviors
836:Lego tire
771:Snow tire
766:Rain tyre
634:Tube King
1715:Category
1654:Tubeless
1639:Run-flat
1619:Off-road
1436:Coupling
1358:Electric
1282:Category
889:Beadlock
781:Bar grip
484:"Valve,"
413:See also
210:aircraft
1183:Blowout
1163:Retread
614:16 June
583:FJC Inc
403:⁄
386:⁄
261:propane
198:engines
83:scholar
1705:Portal
1665:Hybrid
1629:Radial
1607:Hubcap
1421:Clutch
1368:Hybrid
1337:series
459:
345:, and
317:, 1918
287:O-ring
283:washer
159:spring
85:
78:
71:
64:
56:
1746:Tires
1649:Spare
1592:Wheel
1496:Giubo
894:Tread
761:Tweel
723:Types
715:Tires
393:pitch
249:brass
227:Valve
206:SCUBA
90:JSTOR
76:books
1644:Snow
1634:Rain
1614:Tire
884:Bead
641:2021
616:2022
590:2021
470:2013
457:ISBN
441:and
185:and
173:and
165:Uses
130:The
62:news
1597:Rim
379:TPI
293:or
285:or
274:Cap
45:by
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518:^
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