O-ring美国国家标准(AS568)
不同国家O型圈标准
不同国家O型圈标准不同国家对于O型圈的标准并没有明确的统一要求，每个国家都可能有自己的规定和标准。
以下是一些国家对于O型圈的一般要求的概述。
1.日本标准日本国家标准（JIS）对于O型圈的标准规定在JISB2401中。
根据这个标准，O型圈的尺寸是根据内径（d1）、外径（d2）和厚度（d3）来计算的。
具体的尺寸要求可以在JISB2401中找到，并且根据不同的应用有不同的型号和等级。
2.美国标准美国标准协会（ANSI）制定了一些标准来规范O型圈的尺寸和材料。
其中比较常用的是AS568标准，该标准规定了20种不同尺寸的O型圈，分别标记为AS568-001至AS568-020。
这些标准根据内径、截面直径和厚度来进行分类。
3.德国标准德国国家标准（DIN）也有一些关于O型圈的标准。
DIN3771是一种常见的O型圈尺寸标准。
它使用内径（d1）和交叉截面直径（d2）来定义O型圈的尺寸。
4.英国标准英国标准协会（BSI）也有一些标准用于规范O型圈。
BS1806是一种常见的O型圈尺寸标准，它使用内径（d1）和交叉截面直径（d2）来定义O型圈的尺寸。
此外，BS4518还规定了一些O型圈的尺寸和材料要求。
除了以上的国际标准外，不同国家可能还有自己独特的规定和标准。
例如，中国国家标准（GB）有一些关于O型圈的标准，常用的包括GB/T3452.1-2005和GB1235-76、这些标准规定了O型圈的尺寸范围、材料要求和性能测试方法。
总的来说，不同国家的O型圈标准在尺寸、材料和性能上可能存在差异。
因此，在选择O型圈时，需要根据具体的应用需求和国家标准进行选择。
此外，还需要注意使用符合标准要求的工具和设备进行安装和测试，以确保O型圈的质量和性能符合要求。
O_Ring_Select
已知，孔径20，h0=（20-D1）/2,压缩率设定为15%，可以计 算出X=D1.考虑到实际误差，加大到16.9。O型圈内径我们一 般比槽底的直径小0.2mm，则O型圈内径取16.7，最大外径 取20.5 下面进行验算， 根据上面的公式， 压缩率=18.5%，比推荐值稍大。考虑设计可能的精度。 拉伸率算出后等于1.012~1.019，符合拉伸率的要求。 过盈量，一般选择0.3mm。
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对于圆柱面静密封和往复运动密封， ε =10%~15%；对于 平面静密封， ε =15%~30%；旋转动密封， ε =3%~8%；
选取密封圈压缩率的时候主要考虑：
1.要有足够的密封面得接触压力。 2.摩擦力要尽量的小。 3.防止永久性变形。 2，与压缩率对应的是过盈量δ ，过盈量δ 表示密封圈的预 压缩情况，推荐值如下：
注解： 1. 优力胶指PU，聚氨酯胶。 2. 矽胶指硅胶。
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O RING Select
Introduction
标准：大部分国家对O形密封圈都制定系列产品标准，常用 美国标准（AS 568）、日本标准（JIS B 2401）、国际标 准（ISO 3601/1)，中国标准GB 3452.1。
O形密封圈，是一种自动双向作用密封元件。安装时其径向 和轴向方面的预压缩赋与O形密封圈自身的初始密封能力。 它随系统压力的提高而增大。
0型圈有关知识及规格编写方法
0型圈有关知识及规格编写方法一、O-ring的定义O-ring，中文名O型密封圈或者O型圈。
是一种截面是圆（或者说是O）的橡胶密封圈，其主要作用是密封，如气密封、水密封、油密封等。
二、O-ring 的表示方法O型圈的规格标记方法有两种：一：内径ID（inner diameter）*线径CS（cross section）二：内径ID*外径OD（outside diameter）但第一种标记方法比较通用。
三、O-ring的规格O型圈在国际上比较通用的规格标准有美标AS568A、国标GB3452.1-82、日标JIS B-2401等等。
（具体各规格的尺寸型号可参考扩展阅读中的O-RING规格表）四、O型圈的材质选用A、材质表材料名称化学描述英文缩写英文别名丁腈胶丙烯腈－丁二烯橡胶NBR Buna-N氢丁腈胶氢化丙烯腈－丁二烯橡胶HNBR HNBR三元乙丙胶乙烯－丙烯－二烯橡胶EPDMEP,EPT,EPR氯丁二烯氯丁二烯橡胶CRNeoprene硅胶硅树脂橡WMQ PVMQ氟硅氧烷氟硅酮橡胶FVMQ FVMQ丙烯酸酯丙烯酸酯橡胶ACM ACM乙烯丙烯酸乙烯－丙烯酸橡胶AEM Vamac苯乙烯-丁二烯苯乙烯-丁二烯橡胶SBR SBR聚亚安酯聚酯/聚醚氨酯AU/Eu AU/EU 天然橡胶天然橡胶NR NR 以上为O 型圈较常NBRHNBREPDMFKMCR ACMAESBRAU/EUVMQFVMQNR的材质分类，其中最常用的事丁腈胶，因为其综合性能较好，且价格比较低，是性价比最高的O型圈材质。
B、胶产品性能比较表：基本性质总体性能抗压性韧性抗力抗扯断强度抗臭氧性能抗油性抗燃性抗性质抗气体侵蚀性耐磨性高温（标准，∨ dm ;F）2123030392535302122123922高温（特殊，∨ dm ;F）25- - - - - - - - 48- -低温（标准，∨dm;F）-22 -22 -60 5 -40 0 -40 -40 -40 -65 -75 -60 低温（特殊，∨-60 -40 - -30 - - - - -;F）。
AS568美标O形圈规格
(3)AS568 O形圈尺寸表及部件对照表
(a)密封圈及垫片
单位 mm 油 压 用 燃 料 用 润 滑 油 用 O 形 圈 实 际 尺 寸
线径 内径
旧
待续
108
109模
压
密封圈待续
备注上述尺寸为AS568的实际尺寸，而非标准值。
油 压 用 燃 料 用 润 滑 油 用 O 形 圈 实 际 尺 寸
线径 内径旧
单位 mm
110
待续
线径 内径
旧
111模
压
密封圈待续
备注上述尺寸为AS568的实际尺寸，而非标准值。
线径 内径
旧
112
待续
线径 内径旧
113模
压
密封圈待续
线径 内径
旧备注上述尺寸为AS568的实际尺寸，而非标准值。
线径 内径旧
备注上述尺寸为AS568的实际尺寸，而非标准值。
114。
AS 568 美国O型圈标准
widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.The sizes in the standard are defined by maximum and minimum ID and CS dimensions (although most listings, including this one, show this as a midpoint and a ±tolerance). Each ID and CS combination is identified by a three-digit “dash number” as shown below.AS568 Part Numbers:A S568-214C D486 SAE StandardDash SizeCleaning and Packaging Designator (see table below)Compound Number (see table)Cleaning and Packaging Designators:C D First letter indicates cleaningC=Clean in cleanroom with IPA + HeptaneW=Clean in cleanroom with HCL + DIW and IPA + HeptaneN=No special cleaning neededSecond letter indicates packagingD=Double bag, inner bag to be cleanroom qualityS=Single bag in blue Simrit bagB=Bulk packaging per special customer instructions*Except for -001, -002 and -003 sizeswidespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.widespread than just the aerospace industry. SAE AS568 is the most commonly used standard in the US for aerospace, automotive and general industrial applications.w w w.s i m r i t.c o m 1-866-2S I M R I TSimrit –EuropeFreudenberg Simrit KGD-69465 Weinheim, GermanySimrit –Americas47690 East Anchor Court Plymouth, M I 48170。
AS568美标规格o型圈
AS568美标规格o型圈AS568美标规格o型圈AS568美标规格o型圈O型圈：密封圈主要用于流体（如：水、油、空气、化学溶剂、化学药品等）的静态间隙密封等。
长期使用温度在-60℃至220℃。
因材料而异，静态使用压力小于20Mpa。
有时也会用于动态，动态时的使用压力小于5Mpa，及半导体真空密封。
O型圈规格型号主要有UHSO型圈规格，UHPO型圈规格，UNO 型圈规格，DHO型圈规格，活塞杆O型圈规格，进口硅胶O型圈，耐高压O型圈，耐腐蚀O型圈，耐磨损O型圈。
O型圈应用介绍：孔用YX型O型圈产品用途：用于往复运动液压油缸中活塞的密封。
适用范围：TPU：一般液压缸、通用设备液压缸。
CPU：工程机械用液压缸及高温、高压用油缸。
材质：聚氨酯TPU、CPU、橡胶。
产品硬度：HS85±2°A 工作温度：TPU：- 40～+80℃，CPU：-40～+120℃ 工作压力：≤32Mpa 工作介质：液压油、乳化液。
YX型孔用挡O型圈产品用途:本标准适用于油缸工作压力大于16MPa时配合YX型密封圈使用,或油缸偏心受力时,起保护密封圈的作用. 工作温度:-40～+100度。
工作介质:液压油、乳化液、水产品硬度：HS 92±5A 材质：聚四氟乙烯。
轴用YX型O型圈产品用途：用于往复运动液压油缸中活塞杆的密封适用范围:TPU:一般液压缸、通用设备液压缸。
CPU：工程机械用液压缸及高温、高压用油缸。
材质：聚氨酯TPU、CPU、橡胶产品硬度：HS85±2°A 工作温度：TPU：- 40～+80℃ CPU：-40～+120℃ 工作压力：≤32Mpa，工作介质：液压油、乳化液。
编号 d x w 编号 d x w 编号 d x w 编号 d x w 编号 d x wAS001 0.74x1.02 AS035 56.87x1.78 AS120 25.07x2.62 AS154 94.92x2.62 AS210 18.64x2.62AS002 1.07x1.27 AS036 60.05x1.78 AS121 26.64x2.62 AS155 101.27x2.62 AS211 20.22x2.62AS003 1.42x1.52 AS037 63.22x1.78 AS122 28.24x2.62 AS156107.62x2.62 AS212 21.82x3.53AS004 1.78x1.78 AS038 66.40x1.78 AS123 29.82x2.62 AS157 113.97x2.62 AS213 23.39x3.53AS005 2.57x1.78 AS039 69.57x1.78 AS124 31.42x2.62 AS158 120.32x2.62 AS214 24.99x3.53AS006 2.90x1.78 AS040 72.75x1.78 AS125 32.99x2.62 AS159 126.67x2.62 AS215 26.57x3.53AS007 3.68x1.78 AS041 75.92x1.78 AS126 34.59x2.62 AS160 133.02x2.62 AS216 28.17x3.53AS008 4.47x1.78 AS042 82.27x1.78 AS127 39.17x2.62 AS161 139.37x2.62 AS217 29.74x3.53AS009 5.28x1.78 AS043 88.62x1.78 AS128 37.77x2.62 AS162 145.72x2.62 AS218 31.34x3.53AS010 6.07x1.78 AS044 94.97x1.78 AS129 39.34x2.62 AS163 152.07x2.62 AS219 32.92x3.53主要产品:o型圈规格，o型圈标准，进口o型圈，o型圈沟槽，o 型圈用途，o 型圈公差，，骨架油封规格，骨架油封价格，骨架油封材料，骨架油封尺寸标准，骨架油封型号，o型圈槽，o型圈压缩量，进口氟胶o型圈，o型圈材质，o型圈规格表，o型圈规格型号，o型圈的规格，进口o型橡胶密封圈，进口o型圈，o 型圈标准，o型硅胶密封圈，氟胶骨架油封尺寸，骨架油封材料，骨架油封生产厂家，内包骨架型油封，内包骨架型橡胶油封，tc型骨架油封，骨架油封尺寸标准氟橡胶o型圈，进口o型圈公差，进口o型圈用途，o型橡胶密封圈规格，硅橡胶o型密封圈，o型密封圈规格，液压支架密封圈，氟胶o型圈，o型密封圈的作用，0型密封圈，进口o型圈，o型密封圈的选用，o型密封圈设计，o型密封圈规格，o型橡胶密封圈，o型密封圈规格表，o型密封圈规格大全，o型密封圈规格型号，o型密封圈型号，氟胶o型密封圈，硅胶o 型圈，o型密封圈，o型橡胶密封圈价格，o型橡胶密封圈厂家，骨架油封尺寸，nok骨架油封，tto骨架油封，nak骨架油封，j型无骨架油封，英制骨架油封，进口Chesterton 盘根、进口石墨盘根、进口斯特封、进口泛塞封防水圈，橡胶圈，平垫圈，密封圈，密封胶条，骨架油封，耐磨带，导向带，格莱圈规格，进口斯特进口封格莱圈，孔用格莱圈，轴用斯特封，格莱圈生产厂家，斯特封生产厂家，旋转格莱圈，斯特封密封件，骨架油封规格表，骨架油封价格表，进口骨架油封价格，，耐酸碱骨架油封规格，耐高温骨架油封，聚氨酯密封圈、U形圈、Yx圈、Y形圈、骨架油封、V形圈、进口密封条、各类垫片,还有进口油封,油封，骨架油封,气门油封,发动机油封，浮动油封,汽车油封,进口骨架油封,骨架油封规格，油封规格,油封生产,油封型号,NOK 骨架油封,NOK油封，进口O型圈，进口机械密封等各行业用的标准和非标准密封产品的设计制造。
O型圈密封圈的选用
O 形密封圈的选用一、概述 特点：O 形密封圈由于它制造费用低及使用方便，因而被广泛应用在各种动、静密封场合。
标准：大部分国家对O 形密封圈都制定系列产品标准，其中美国标准（AS 568）、日本标准（JIS B 2401）、国际标准（ISO 3601/1）较为通用。
O型圈标准一览表表1标准 O 型圈截面直径W美国标准 AS 568 英国标准 BS 15161.782.623.53 5.33 7.00日本标准 JIS B 2401 1.9 2.4 3.1 3.5 5.78.4国际标准 ISO 3601/1 德国标准 DIN3771/1 中国标准 GB 3452.11.82.653.55 5.307.00优先的米制尺寸1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 7.0 8.0 10.012.0美国标准AS 568（900系列）1.02 1.42 1.631.83 1.982.08 2.21 2.462.953.00密封机理：O形密封圈是一种自动双向作用密封元件。
安装时其径向和轴向方面的预压缩赋与O形密封圈自身的初始密封能力。
它随系统压力的提高而增大。
性能参数：静态密封动态密封工作压力无挡圈时，最高可达20MPa；有挡圈时，最高可达40MPa；用特殊挡圈时，最高可达200MPa。
无挡圈时，最高可达5MPa；有挡圈时，较高压力。
运动速最大往复速度可达0.5m/s，最大旋转速度可达2.0m/s。
度一般场合：-30℃～+110℃；特殊橡胶：-60℃～+250℃；旋温度转场合：-30℃～+80℃介质见《橡胶密封件原料特性表》。
二、O形密封圈选择应考虑的因素1、工作介质和工作条件在具体选取O形圈材料时，首先要考虑与工作介质的相容性。
还须综合考虑其密封处的压力、温度、连续工作时间、运行周期等工作条件。
若用在旋转场合，须考虑由于摩擦热引起的温升。
不同的密封件材料，其物理性能和化学性能都不一样，见《橡胶密封件原料特性表》。
SAE AS568B-2001(O型圈)
SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2001 Society of Automotive Engineers, Inc.All rights reserved.Printed in U.S.A. TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS: SAE AS568 Revision B2.3Table 2, using the 900 series dash numbers, lists all of the presently standardized straight thread tube fitting boss gaskets. This series has traditionally utilized the significant dash numbering system, wherein the dash number designates the tube size in 16th’s of an inch. This practice is also followed here, with the exception of the -901, which is intended for a 0.0938 inch (2.38 mm) nominal OD (outside diameter) tube, the 0.0625 inch (1.59 mm) OD tube not being in common aircraft use.2.4In the interest of standardization, it is requested that companies or agencies do not use the dash numbers in Table 1 to which sizes have not been assigned. Sizes not assigned are indicated by an asterisk (*). Anyone feeling that any special size not now shown is widely enough used to justify standardization should direct such a request to AMS Committee “CE” for coordination.FIGURE 1 - Cross-Sectional Diameter “W”PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “CE”--````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`-----````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----031 1.724 1.75443.7944.550.0670.073 1.70 1.850.02190.359-032 1.849 1.87946.9647.730.0670.073 1.70 1.850.02340.383-033 1.971 2.00750.0650.980.0670.073 1.70 1.850.02490.408-034 2.096 2.13253.2454.150.0670.073 1.70 1.850.02640.433-035 2.221 2.25756.4157.330.0670.073 1.70 1.850.02790.457-036 2.346 2.38259.5960.500.0670.073 1.70 1.850.02940.482-037 2.471 2.50762.7663.680.0670.073 1.70 1.850.03090.506-038 2.594 2.63465.966.90.0670.073 1.70 1.850.03250.533-039 2.719 2.75969.170.10.0670.073 1.70 1.850.03400.557-040 2.844 2.88472.273.30.0670.073 1.70 1.850.03550.582-041 2.965 3.01375.376.50.0670.073 1.70 1.850.03700.606-042 3.215 3.26381.782.90.0670.073 1.70 1.850.04000.655-043 3.465 3.51388.089.20.0670.073 1.70 1.850.04300.705-044 3.712 3.76694.395.70.0670.073 1.70 1.850.04610.755-0453.9624.016100.6102.00.0670.073 1.70 1.850.04910.805-046 4.209 4.269106.9108.40.0670.073 1.70 1.850.05210.854-047 4.459 4.519113.3114.80.0670.073 1.70 1.850.05510.903-048 4.709 4.769119.6121.10.0670.073 1.70 1.850.05810.952-049 4.9525.026125.8127.70.0670.073 1.70 1.850.0612 1.003-050 5.2025.276132.1134.00.0670.0731.701.850.06421.052*051THRU *101*O-RING SIZES NOT ASSIGNED-1020.0440.054 1.12 1.370.1000.106 2.54 2.690.00400.066-1030.0760.086 1.93 2.180.1000.106 2.54 2.690.00480.079-1040.1070.117 2.72 2.970.1000.106 2.54 2.690.00560.092-1050.1380.148 3.51 3.760.1000.106 2.54 2.690.00640.105TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----1060.1690.179 4.29 4.550.1000.106 2.54 2.690.00730.120-1070.2010.211 5.11 5.360.1000.106 2.54 2.690.00810.133-1080.2320.242 5.89 6.150.1000.106 2.54 2.690.00890.146-1090.2940.304 7.47 7.720.1000.106 2.54 2.690.01050.172-1100.3570.367 9.07 9.320.1000.106 2.54 2.690.01220.200-1110.4190.429 10.64 10.900.1000.106 2.54 2.690.01380.226-1120.4820.492 12.24 12.500.1000.106 2.54 2.690.01540.252-1130.5420.556 13.77 14.120.1000.106 2.54 2.690.01710.280-1140.6030.621 15.32 15.770.1000.106 2.54 2.690.01870.306-1150.6650.683 16.89 17.350.1000.106 2.54 2.690.02030.333-1160.7280.746 18.49 18.950.1000.106 2.54 2.690.02200.361-1170.7890.809 20.04 20.550.1000.106 2.54 2.690.02360.387-1180.8520.872 21.64 22.150.1000.106 2.54 2.690.02530.415-1190.9140.934 23.22 23.720.1000.106 2.54 2.690.02690.441-1200.9770.997 24.82 25.320.1000.106 2.54 2.690.02850.467-121 1.039 1.059 26.39 26.900.1000.106 2.54 2.690.03020.495-122 1.102 1.122 27.99 28.500.1000.106 2.54 2.690.03180.521-123 1.162 1.186 29.51 30.120.1000.106 2.54 2.690.03340.547-124 1.225 1.249 31.12 31.720.1000.106 2.54 2.690.03510.575-125 1.287 1.311 32.69 33.300.1000.106 2.54 2.690.03670.601-126 1.350 1.374 34.29 34.900.1000.106 2.54 2.690.03830.628-127 1.412 1.436 35.86 36.470.1000.106 2.54 2.690.04000.655-128 1.475 1.499 37.46 38.070.1000.106 2.54 2.690.04160.682-129 1.534 1.564 38.96 39.730.1000.106 2.54 2.690.04320.708-130 1.597 1.627 40.56 41.330.1000.106 2.54 2.690.04490.736-131 1.659 1.689 42.14 42.900.1000.106 2.54 2.690.04650.762-132 1.722 1.752 43.74 44.500.1000.106 2.54 2.690.04820.790-133 1.784 1.814 45.31 46.080.1000.106 2.54 2.690.04980.816-134 1.847 1.877 46.91 47.680.1000.106 2.54 2.690.05140.842-1351.9081.94248.4649.330.1000.1062.542.690.05310.870TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----136 1.970 2.004 50.04 50.900.1000.106 2.54 2.690.05470.896-137 2.033 2.067 51.64 52.500.1000.106 2.54 2.690.05640.924-138 2.095 2.129 53.21 54.080.1000.106 2.54 2.690.05800.950-139 2.158 2.192 54.81 55.680.1000.106 2.54 2.690.05960.977-140 2.220 2.254 56.39 57.250.1000.106 2.54 2.690.0613 1.005-141 2.280 2.320 57.9 58.90.1000.106 2.54 2.690.0629 1.031-142 2.342 2.382 59.5 60.50.1000.106 2.54 2.690.0645 1.057-143 2.405 2.445 61.1 62.10.1000.106 2.54 2.690.0662 1.085-144 2.467 2.507 62.7 63.70.1000.106 2.54 2.690.0678 1.111-145 2.530 2.570 64.3 65.30.1000.106 2.54 2.690.0694 1.137-146 2.592 2.632 65.8 66.90.1000.106 2.54 2.690.0711 1.165-147 2.653 2.697 67.4 68.50.1000.106 2.54 2.690.0727 1.191-148 2.715 2.759 69.0 70.10.1000.106 2.54 2.690.0743 1.218-149 2.778 2.822 70.6 71.70.1000.106 2.54 2.690.0760 1.245-150 2.840 2.884 72.1 73.30.1000.106 2.54 2.690.0776 1.272-151 2.963 3.011 75.3 76.50.1000.106 2.54 2.690.0809 1.326-152 3.213 3.261 81.6 82.80.1000.106 2.54 2.690.0874 1.432-153 3.463 3.511 88.0 89.20.1000.106 2.54 2.690.0940 1.540-154 3.709 3.765 94.2 95.60.1000.106 2.54 2.690.1005 1.647-155 3.959 4.015100.6102.00.1000.106 2.54 2.690.1071 1.755-156 4.207 4.267106.9108.40.1000.106 2.54 2.690.1136 1.862-157 4.457 4.517113.2114.70.1000.106 2.54 2.690.1202 1.970-158 4.707 4.767119.6121.10.1000.106 2.54 2.690.1267 2.076-159 4.952 5.022125.8127.60.1000.106 2.54 2.690.1332 2.183-160 5.202 5.272132.1133.90.1000.106 2.54 2.69 1.1398 2.291-161 5.452 5.522138.5140.30.1000.106 2.54 2.690.1463 2.397-162 5.702 5.772144.8146.60.1000.106 2.54 2.690.1529 2.506-163 5.952 6.022151.2153.00.1000.106 2.54 2.690.1594 2.612-164 6.197 6.277157.4159.40.1000.106 2.54 2.690.1660 2.720-1656.4476.527163.8165.80.1000.1062.542.690.17252.827TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`-----````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----216 1.097 1.121 27.86 28.470.1350.143 3.43 3.630.05950.975-217 1.159 1.183 29.44 30.050.1350.143 3.43 3.630.0625 1.024-218 1.222 1.246 31.04 31.650.1350.143 3.43 3.630.0655 1.073-219 1.284 1.308 32.61 33.220.1350.143 3.43 3.630.0684 1.121-220 1.347 1.371 34.21 34.820.1350.143 3.43 3.630.0714 1.170-221 1.409 1.433 35.79 36.400.1350.143 3.43 3.630.0744 1.219-222 1.469 1.499 37.31 38.070.1350.143 3.43 3.630.0774 1.268-223 1.594 1.624 40.49 41.250.1350.143 3.43 3.630.0833 1.365-224 1.719 1.749 43.66 44.420.1350.143 3.43 3.630.0893 1.463-225 1.841 1.877 46.76 47.680.1350.143 3.43 3.630.0952 1.560-226 1.966 2.002 49.94 50.850.1350.143 3.43 3.630.1012 1.658-227 2.091 2.127 53.11 54.030.1350.143 3.43 3.630.1072 1.757-228 2.214 2.254 56.2 57.30.1350.143 3.43 3.630.1131 1.853-229 2.339 2.379 59.4 60.40.1350.143 3.43 3.630.1191 1.952-230 2.464 2.504 62.6 63.60.1350.143 3.43 3.630.1250 2.048-231 2.589 2.629 65.8 66.80.1350.143 3.43 3.630.1310 2.147-232 2.710 2.758 68.8 70.10.1350.143 3.43 3.630.1370 2.245-233 2.835 2.883 72.0 73.20.1350.143 3.43 3.630.1429 2.342-234 2.960 3.008 75.2 76.40.1350.143 3.43 3.630.1489 2.440-235 3.085 3.133 78.4 79.60.1350.143 3.43 3.630.1548 2.537-236 3.210 3.258 81.5 82.80.1350.143 3.43 3.630.1608 2.635-237 3.335 3.383 84.7 85.90.1350.143 3.43 3.630.1668 2.733-238 3.460 3.508 87.9 89.10.1350.143 3.43 3.630.1727 2.830-239 3.581 3.637 91.0 92.40.1350.143 3.43 3.630.1787 2.928-240 3.706 3.762 94.1 95.60.1350.143 3.43 3.630.1846 3.025-241 3.831 3.887 97.3 98.70.1350.143 3.43 3.630.1906 3.123-242 3.956 4.012100.5101.90.1350.143 3.43 3.630.1966 3.222-243 4.081 4.137103.7105.10.1350.143 3.43 3.630.2025 3.318-244 4.204 4.264106.8108.30.1350.143 3.43 3.630.2085 3.417-2454.3294.389110.0111.50.1350.1433.433.630.21443.513TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm-246 4.454 4.514113.1114.70.1350.143 3.43 3.630.2204 3.612-247 4.579 4.639116.3117.80.1350.143 3.43 3.630.2263 3.708-248 4.704 4.764119.5121.00.1350.143 3.43 3.630.2323 3.807-249 4.824 4.894122.5124.30.1350.143 3.43 3.630.2383 3.905-250 4.949 5.019125.7127.50.1350.143 3.43 3.630.2442 4.002-251 5.074 5.144128.9130.70.1350.143 3.43 3.630.2502 4.100-252 5.199 5.269132.1133.80.1350.143 3.43 3.630.2561 4.197-253 5.324 5.394135.2137.00.1350.143 3.43 3.630.2621 4.295-254 5.449 5.519138.4140.20.1350.143 3.43 3.630.2681 4.393-255 5.574 5.644141.6143.40.1350.143 3.43 3.630.2740 4.490-256 5.699 5.769144.8146.50.1350.143 3.43 3.630.2800 4.588-257 5.824 5.894147.9149.70.1350.143 3.43 3.630.2859 4.685-258 5.949 6.019151.1152.90.1350.143 3.43 3.630.2919 4.783-259 6.194 6.274157.3159.40.1350.143 3.43 3.630.3038 4.978-260 6.444 6.524163.7165.70.1350.143 3.43 3.630.3157 5.173-261 6.694 6.774170.0172.10.1350.143 3.43 3.630.3277 5.370-262 6.9447.024176.4178.40.1350.143 3.43 3.630.3396 5.565-2637.1897.279182.6184.90.1350.143 3.43 3.630.3515 5.760-2647.4397.529189.0191.20.1350.143 3.43 3.630.3634 5.955-2657.6897.779195.3197.60.1350.143 3.43 3.630.3753 6.150-2667.9398.029201.7203.90.1350.143 3.43 3.630.3872 6.345-2678.1848.284207.9210.40.1350.143 3.43 3.630.3992 6.542-2688.4348.534214.2216.80.1350.143 3.43 3.630.4111 6.737-2698.6848.784220.6223.10.1350.143 3.43 3.630.4230 6.932-2708.9349.034226.9229.50.1350.143 3.43 3.630.43497.127-2719.1799.289233.1235.90.1350.143 3.43 3.630.44687.322-2729.4299.539239.5242.30.1350.143 3.43 3.630.45887.518-2739.6799.789245.8248.60.1350.143 3.43 3.630.47077.713-2749.92910.039252.2255.00.1350.143 3.43 3.630.48267.908-27510.42910.539264.9267.70.1350.1433.433.630.50648.298TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----27610.91911.049277.3280.60.1350.143 3.43 3.630.5303 8.690-27711.41911.549290.0293.30.1350.143 3.43 3.630.5541 9.080-27811.91912.049302.7306.00.1350.143 3.43 3.630.5779 9.470-27912.91913.049328.1331.40.1350.143 3.43 3.630.625610.252-28013.91914.049353.5356.80.1350.143 3.43 3.630.673311.033-28114.91915.049378.9382.20.1350.143 3.43 3.630.721011.815-28215.88016.030403.4407.20.1350.143 3.43 3.630.767212.572-28316.87517.035428.6432.70.1350.143 3.43 3.630.814913.354-28417.87018.040453.9458.20.1350.1433.433.630.862614.136*285THRU *308*O-RING SIZES NOT ASSIGNED-3090.4070.417 10.34 10.590.2050.215 5.21 5.460.0677 1.109-3100.4700.480 11.94 12.190.2050.215 5.21 5.460.0745 1.221-3110.5300.544 13.46 13.820.2050.215 5.21 5.460.0813 1.332-3120.5910.609 15.01 15.470.2050.215 5.21 5.460.0881 1.444-3130.6530.671 16.59 17.040.2050.215 5.21 5.460.0949 1.555-3140.7150.735 18.16 18.670.2050.215 5.21 5.460.1017 1.667-3150.7770.797 19.74 20.240.2050.215 5.21 5.460.1085 1.778-3160.8400.860 21.34 21.840.2050.215 5.21 5.460.1153 1.889-3170.9020.922 22.91 23.420.2050.215 5.21 5.460.1221 2.001-3180.9650.985 24.51 25.020.2050.215 5.21 5.460.1289 2.112-319 1.027 1.047 26.09 26.590.2050.215 5.21 5.460.1357 2.224-320 1.088 1.112 27.64 28.240.2050.215 5.21 5.460.1425 2.335-321 1.150 1.174 29.21 29.820.2050.215 5.21 5.460.1493 2.447-322 1.213 1.237 30.81 31.420.2050.215 5.21 5.460.1561 2.558-323 1.275 1.299 32.38 32.990.2050.215 5.21 5.460.1629 2.669-324 1.338 1.362 33.99 34.590.2050.215 5.21 5.460.1697 2.781-3251.4601.49037.0837.850.2050.2155.215.460.18333.004TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cmSAE AS568 Revision B-326 1.585 1.615 40.26 41.020.2050.215 5.21 5.460.1970 3.228-327 1.710 1.740 43.43 44.200.2050.215 5.21 5.460.2106 3.451-328 1.835 1.865 46.61 47.370.2050.215 5.21 5.460.2242 3.674-329 1.957 1.993 49.71 50.620.2050.215 5.21 5.460.2378 3.897-330 2.082 2.118 52.88 53.800.2050.215 5.21 5.460.2514 4.120-331 2.207 2.243 56.06 56.970.2050.215 5.21 5.460.2650 4.343-332 2.332 2.368 59.23 60.150.2050.215 5.21 5.460.2786 4.565-333 2.455 2.495 62.4 63.40.2050.215 5.21 5.460.2922 4.788-334 2.580 2.620 65.5 66.50.2050.215 5.21 5.460.3058 5.011-335 2.705 2.745 68.7 69.70.2050.215 5.21 5.460.3194 5.234-336 2.830 2.870 71.9 72.90.2050.215 5.21 5.460.3330 5.457-337 2.951 2.999 75.0 76.20.2050.215 5.21 5.460.3466 5.680-338 3.076 3.124 78.1 79.30.2050.215 5.21 5.460.3602 5.903-339 3.201 3.249 81.3 82.50.2050.215 5.21 5.460.3738 6.125-340 3.326 3.374 84.5 85.70.2050.215 5.21 5.460.3874 6.348-341 3.451 3.499 87.7 88.90.2050.215 5.21 5.460.4010 6.571-342 3.572 3.628 90.7 92.20.2050.215 5.21 5.460.4146 6.796-343 3.697 3.753 93.9 95.30.2050.215 5.21 5.460.42827.017-344 3.822 3.878 97.1 98.50.2050.215 5.21 5.460.44187.240-345 3.947 4.003100.3101.70.2050.215 5.21 5.460.45547.463-346 4.072 4.128103.4104.90.2050.215 5.21 5.460.46907.686-347 4.195 4.255106.6108.10.2050.215 5.21 5.460.48267.908-348 4.320 4.380109.7111.30.2050.215 5.21 5.460.49628.131-349 4.445 4.505112.9114.40.2050.215 5.21 5.460.50988.354-350 4.570 4.630116.1117.60.2050.215 5.21 5.460.52348.577-351 4.695 4.755119.3120.80.2050.215 5.21 5.460.53708.800-352 4.820 4.880122.4124.00.2050.215 5.21 5.460.55069.023-353 4.938 5.012125.4127.30.2050.215 5.21 5.460.56429.246-354 5.063 5.137128.6130.50.2050.215 5.21 5.460.57789.468-3555.1885.262131.8133.70.2050.2155.215.460.59149.691TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----356 5.313 5.387135.0136.80.2050.215 5.21 5.460.6050 9.914-357 5.438 5.512138.1140.00.2050.215 5.21 5.460.618610.137-358 5.563 5.637141.3143.20.2050.215 5.21 5.460.632210.360-359 5.688 5.762144.5146.40.2050.215 5.21 5.460.645810.583-360 5.813 5.887147.7149.50.2050.215 5.21 5.460.659410.806-361 5.938 6.012150.8152.70.2050.215 5.21 5.460.673011.029-362 6.185 6.265157.1159.10.2050.215 5.21 5.460.700211.474-363 6.435 6.515163.4165.50.2050.215 5.21 5.460.727411.920-364 6.685 6.765169.8171.80.2050.215 5.21 5.460.754612.366-365 6.935 7.015176.1178.20.2050.215 5.21 5.460.781812.811-366 7.180 7.270182.4184.70.2050.215 5.21 5.460.809013.257-367 7.430 7.520188.7191.00.2050.215 5.21 5.460.836213.703-368 7.680 7.770195.1197.40.2050.215 5.21 5.460.863414.149-369 7.930 8.020201.4203.70.2050.215 5.21 5.460.890614.594-370 8.175 8.275207.6210.20.2050.215 5.21 5.460.917815.040-371 8.425 8.525214.0216.50.2050.215 5.21 5.460.945015.486-372 8.675 8.775220.3222.90.2050.215 5.21 5.460.972215.932-373 8.925 9.025226.7229.20.2050.215 5.21 5.460.999416.377-374 9.170 9.280232.9235.70.2050.215 5.21 5.46 1.026616.823-375 9.420 9.530239.3242.10.2050.215 5.21 5.46 1.053817.269-376 9.670 9.780245.6248.40.2050.215 5.21 5.46 1.081117.716-377 9.92010.030252.0254.80.2050.215 5.21 5.46 1.108318.162-37810.41510.535264.5267.60.2050.215 5.21 5.46 1.162719.053-37910.91511.035277.2280.30.2050.215 5.21 5.46 1.217119.945-38011.41011.540289.8293.10.2050.215 5.21 5.46 1.271520.836-38111.91012.040302.5305.80.2050.215 5.21 5.46 1.326921.728-38212.91013.040327.9331.20.2050.215 5.21 5.46 1.434723.511-38313.90514.045353.2356.70.2050.215 5.21 5.46 1.543525.293-38414.90515.045378.6382.10.2050.215 5.21 5.46 1.652327.076-38515.88016.030403.4407.20.2050.2155.215.461.759028.825TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----38616.87517.035428.6432.70.2050.215 5.21 5.46 1.867830.608-38717.87018.040453.9458.20.2050.215 5.21 5.46 1.976632.391-38818.86519.045479.2483.70.2050.215 5.21 5.46 2.085434.174-38919.86020.050504.4509.30.2050.215 5.21 5.46 2.194235.957-39020.86021.050529.8534.70.2050.215 5.21 5.46 2.303037.739-39121.85522.055555.1560.20.2050.215 5.21 5.46 2.411839.522-39222.83523.045580.0585.30.2050.215 5.21 5.46 2.519041.279-39323.83024.050605.3610.90.2050.215 5.21 5.46 2.627843.062-39424.82525.055630.6636.40.2050.215 5.21 5.46 2.736644.845-39525.82026.060655.8661.90.2050.2155.215.462.845446.628*396THRU *424*O-RING SIZES NOT ASSIGNED-425 4.442 4.508112.8114.50.2690.281 6.837.140.886314.524-426 4.567 4.633116.0117.70.2690.281 6.837.140.909714.907-427 4.692 4.758119.2120.90.2690.281 6.837.140.933015.289-428 4.817 4.883122.4124.00.2690.281 6.837.140.956315.671-429 4.938 5.012125.4127.30.2690.281 6.837.140.979616.053-430 5.063 5.137128.6130.50.2690.281 6.837.14 1.003016.436-431 5.188 5.262131.8133.70.2690.281 6.837.14 1.026316.818-432 5.313 5.387135.0136.80.2690.281 6.837.14 1.049617.200-433 5.438 5.512138.1140.00.2690.281 6.837.14 1.072917.582-434 5.563 5.637141.3143.20.2690.281 6.837.14 1.096317.965-435 5.688 5.762144.5146.40.2690.281 6.837.14 1.119618.347-436 5.813 5.887147.7149.50.2690.281 6.837.14 1.142918.729-437 5.938 6.012150.8152.70.2690.281 6.837.14 1.166219.111-438 6.185 6.265157.1159.10.2690.281 6.837.14 1.212919.876-439 6.435 6.515163.4165.50.2690.281 6.837.14 1.259520.640-4406.6856.765169.8171.80.2690.2816.837.141.306221.405TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----441 6.935 7.015176.1178.20.2690.281 6.837.14 1.352822.168-442 7.180 7.270182.4184.70.2690.281 6.837.14 1.399522.934-443 7.430 7.520188.7191.00.2690.281 6.837.14 1.446123.697-444 7.680 7.770195.1197.40.2690.281 6.837.14 1.492824.463-445 7.930 8.020201.4203.70.2690.281 6.837.14 1.539425.226-446 8.420 8.530213.9216.70.2690.281 6.837.14 1.632726.755-447 8.920 9.030226.6229.40.2690.281 6.837.14 1.726028.284-448 9.420 9.530239.3242.10.2690.281 6.837.14 1.819329.813-449 9.92010.030252.0254.80.2690.281 6.837.14 1.912631.342-45010.41510.535264.5267.60.2690.281 6.837.14 2.005932.871-45110.91511.035277.2280.30.2690.281 6.837.14 2.099234.400-45211.41511.535289.9293.00.2690.281 6.837.14 2.192535.929-45311.91512.035302.6305.70.2690.281 6.837.14 2.285837.458-45412.41512.535315.3318.40.2690.281 6.837.14 2.379138.987-45512.91513.035328.0331.10.2690.281 6.837.14 2.472440.515-45613.40513.545340.5344.00.2690.281 6.837.14 2.565742.044-45713.90514.045353.2356.70.2690.281 6.837.14 2.659043.573-45814.40514.545365.9369.40.2690.281 6.837.14 2.752345.102-45914.90515.045378.6382.10.2690.281 6.837.14 2.845646.631-46015.40515.545391.3394.80.2690.281 6.837.14 2.938948.160-46115.88016.030403.4407.20.2690.281 6.837.14 3.028549.628-46216.38016.530416.1419.90.2690.281 6.837.14 3.121851.157-46316.87517.035428.6432.70.2690.281 6.837.14 3.215152.686-46417.37017.540441.2445.50.2690.281 6.837.14 3.308454.215-46517.87018.040453.9458.20.2690.281 6.837.14 3.401755.744-46618.37018.540466.6470.90.2690.281 6.837.14 3.495057.273-46718.86519.045479.2483.70.2690.281 6.837.14 3.588358.802-46819.36519.545491.9496.40.2690.281 6.837.14 3.681660.331-46919.86020.050504.4509.30.2690.281 6.837.14 3.774961.860-47020.86021.050529.8534.70.2690.2816.837.143.961564.917TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`----47121.85522.055555.1560.20.2690.281 6.837.14 4.148167.975-47222.83523.045580.0585.30.2690.281 6.837.14 4.331970.987-47323.83024.050605.3610.90.2690.281 6.837.14 4.518474.043-47424.82525.055630.6636.40.2690.281 6.837.14 4.705077.101-47525.82026.060655.8661.90.2690.2816.837.144.891680.159TABLE 2 - Aerospace Size Standards for Straight Thread Tube Fitting Boss GasketsDash Number Tube Size (Nom)Inches Tube Size (Nom)mm ID Inches min IDInches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm -9010.0938 2.3830.1800.190 4.57 4.830.0530.059 1.35 1.500.00190.031-9020.125 3.180.2340.244 5.94 6.200.0610.067 1.55 1.700.00310.051-9030.1875 4.7630.2960.306 7.52 7.770.0610.067 1.55 1.700.00370.061-9040.250 6.350.3460.356 8.79 9.040.0690.075 1.75 1.900.00540.088-9050.3125 7.9380.4090.41910.3910.640.0690.075 1.75 1.900.00620.102-9060.375 9.530.4630.47311.7612.010.0750.081 1.90 2.060.00820.134-9070.437511.110.5230.53713.2813.640.0790.085 2.01 2.160.01020.167-9080.50012.700.6350.65316.1316.590.0840.090 2.13 2.290.01370.225-9090.562514.2880.6970.71517.7018.160.0940.100 2.39 2.540.01860.305-9100.62515.880.7460.76418.9519.410.0940.100 2.39 2.540.01980.324-9110.687517.4630.8540.87221.6922.150.1120.120 2.84 3.050.03250.533-9120.75019.050.9150.93323.2423.700.1120.120 2.84 3.050.03450.565-9130.182520.6380.9760.99624.7925.300.1120.120 2.84 3.050.03660.600-9140.87522.23 1.037 1.05726.3426.850.1120.120 2.84 3.050.03860.633-916 1.00025.40 1.161 1.18129.4930.000.1120.120 2.84 3.050.04270.700-918 1.12528.58 1.343 1.36734.1134.720.1120.120 2.84 3.050.04880.800-920 1.25031.75 1.461 1.48937.1137.820.1140.122 2.90 3.100.05470.896-924 1.50038.10 1.706 1.73443.3344.040.1140.122 2.90 3.100.0631 1.034-928 1.75044.45 2.072 2.10852.6353.540.1140.122 2.90 3.100.0759 1.244-9322.00050.802.3192.35658.9059.820.1140.1222.903.100.08431.381TABLE 1 - Aerospace Size Standards for O-Rings (Continued)Dash Number ID Inches min ID Inches max ID mm min ID mm max W Inches min W Inches max W mm min W mm max Volume (Ref)Cubic Inches Volume (Ref)Cubic cm --````,,`,,,,,```,``,`,`,,,``-`-`,,`,,`,`,,`---。
气动密封o型圈标准
气动密封o型圈标准英文回答：Pneumatic Seal O-Ring Standards.Pneumatic seal O-rings are essential components in a wide range of pneumatic systems, providing a reliable and effective seal to prevent leakage and maintain system performance. To ensure proper functioning and compatibility, these O-rings must meet specific standards that definetheir dimensions, materials, and performance characteristics.ISO 3601-1:2017。
ISO 3601-1:2017 is the international standard that specifies the dimensions and tolerances for O-rings used in pneumatic applications. This standard covers both metricand inch sizes, with a range of cross-sectional diameters and thicknesses. It also includes requirements for thesurface roughness and hardness of the O-ring material.AS568A.AS568A is an American National Standard that provides specifications for O-rings used in aerospace applications. This standard includes a wide range of sizes, materials,and performance requirements, including those for pneumatic seals. AS568A O-rings are designed to meet the demanding conditions found in aerospace systems, such as high pressure, extreme temperatures, and corrosive environments.Material Selection.The choice of material for a pneumatic seal O-ring depends on the specific application requirements. Common materials include:Nitrile (Buna-N): Offers good resistance to oil, fuels, and solvents.Fluorocarbon (Viton): Provides excellent resistance tohigh temperatures and chemicals.Silicone: Has good flexibility and low-temperature resistance.Polyurethane: Offers high wear resistance and durability.Performance Characteristics.In addition to dimensions and materials, pneumatic seal O-rings must also meet specific performance requirements, including:Leakage rate: The amount of leakage that occurs through the O-ring at a given pressure.Friction: The force required to overcome the friction between the O-ring and the sealing surface.Temperature range: The temperature range over which the O-ring can operate effectively.Pressure range: The pressure range within which the O-ring can maintain a seal.Proper Installation and Maintenance.To ensure proper functioning and longevity of pneumatic seal O-rings, it is critical to follow proper installation and maintenance procedures. This includes:Selecting the correct O-ring size and material for the application.Inspecting the O-ring for any damage or defects before installation.Lubricating the O-ring and sealing surface to reduce friction.Regularly inspecting and replacing O-rings as needed to maintain system performance.中文回答：气动密封O型圈标准。