Parker O-Ring Handbook.pdf

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Dynamic O-Ring Sealing 5-44 5.32 Dynamic Vacuum Sealing There is very little data available on dynamic vacuum seals, but reasonably low leak rates have been reported using two O-rings seals designed according to the standard radial dynamic design dimensions for reciprocating seals which are shown in Design Chart 5-5. In sealing gases and vacuum, it is quite feasible to use two O-ring seals in separate grooves. (In reciprocating hydraulic applications, however, such redundant seals are not recommended because of the danger of creating a pressure trap between the two seals.) Piston Glands Piston Groove Dia. Piston O.D. Cylinder Bore Dia. Parker O-Ring Handbook For Reciprocating Vacuum Packing Glands Rod Glands Rod O.D. Rod Bore Dia. Rod Gland Groove I.D. Refer to Design Chart 5-5 (below) for dimensions. Reciprocating Vacuum Packing Glands O-Ring Size W Cross-Section L Gland Squeeze AS568A- Nominal Actual Depth Actual % 006 through 012 1/16 .070 ±.003 .055 to .057 .010 to .018 15 to 25 104 through 116 3/32 .103 ±.003 .088 to .090 .010 to .018 10 to 17 201 through 222 1/8 .139 ±.004 .121 to .123 .012 to .022 9 to 16 309 through 349 3/16 .210 ±.005 .185 to .188 .017 to .030 8 to 14 425 through 460 1/4 .275 ±.006 .237 to .240 .029 to .044 11 to 16 *Total indicator reading between groove and adjacent bearing surface. Design Chart 5-5: Design Chart for Reciprocating Vacuum Packing Glands W W I.D. E Diametral Clearance .002 to .005 .002 to .005 .003 to .006 .003 to .006 .004 to .007 16 Gland Detail 0° to 5° Break Corners (Typ.) Approx. .005 Rad. 1/2E 16 R 32 G 16 W F L Gland Depth F Groove Depth (Ref.) Finishes are RMS values G Groove Width .093 to .098 .140 to .145 .187 to .192 .281 to .286 .375 to .380 .003 Typ. Section W-W R Groove Radius .005 to .015 .005 to .015 .010 to .025 .020 to .035 .020 to .035 .005 Typ. W Max.* Eccentricity .002 .002 .003 .004 .005 Parker Hannifi n Corporation • O-Ring Division 2360 Palumbo Drive, Lexington, KY 40509 Phone: (859) 269-2351 Fax: (859) 335-5128 www.parkerorings.com
Section VI – Back-Up Rings 6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 6.2 Anti-Extrusion Device Design Hints . . . . . . . . . . . . 6-2 6.3 Parbak ® Elastomer Back-Up Rings . . . . . . . . . . . . . 6-2 6.4 Other Back-Up Ring Materials . . . . . . . . . . . . . . . . 6-2 6.4.1 Polytetrafl uoroethylene (PTFE) Back-Up Rings . . . . . . . . . . . . . . . . . . . . 6-2 6.4.2 Metal Non-Extrusion Rings . . . . . . . . . . . . . . . 6-3 6.4.3 Leather Back-Up Rings . . . . . . . . . . . . . . . . . . 6-3 6.5 Parbak Compound Information . . . . . . . . . . . . . . . . 6-3 6.6 Parker Parbak 8-Series Dimensions. . . . . . . . . . . . . 6-3 Parbak® is a registered trademark of Parker Hannifi n Corporation. Parker O-Ring Handbook Parker Hannifi n Corporation • O-Ring Division 2360 Palumbo Drive, Lexington, KY 40509 Phone: (859) 269-2351 Fax: (859) 335-5128 www.parkerorings.com Back-Up Rings 6-1
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aerospace climate control electrome
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50 th 50 th 50 th Anniversary Editi
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Section I - Introduction 1.0 How to
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1.4 Operation All robust seals are
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1.7.1 Static Seals In a truly stati
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1.11 Comparison of Common Seal Type
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Section II - Basic O-Ring Elastomer
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2.1.2 Rubber Rubber-like materials
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2.2.6 Chloroprene Rubber (CR) Chlor
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2.3 Compound Selection and Numberin
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O-ring seal, whether static or dyna
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Percent Compression 40% 30% 20% 10%
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Percent Compression 40% 30% 20% 10%
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Compression Set (% ) 100 Figure 2-1
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2.4.12 Thermal Effects All rubber i
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coeffi cient of expansion for that
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2.6 Aging Deterioration with time o
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A well-known rapid method for mater
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2.13.2 Temperature Temperature rang
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100 80 60 40 20 0 °C -50 °F -58 -
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misapplication might be greatly red
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c. Elongation Change Experience wil
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is possible to receive a part with
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Section III - O-Ring Applications 3
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3.1.2 Temperature Operating tempera
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O-Lube has some unique advantages.
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Parker Boss Kit Sizes Size Dimensio
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Recovery Percent of Original Delect
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3.9.5 Fuels for Automobile Engines
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Parker Seal produces a number of co
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3.9.16 Fungus-Resistant Compounds B
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3.9.17.2 Concentrates Containing Mi
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Where temperatures do not go below
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Permeability Rate - CC/SEC/ATM Effe
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Underwriters’ Laboratories Approv
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Parker Seal Elastic Drive Belt Comp
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Parker O-Ring Handbook Gas Permeabi
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Section IV - Static O-Ring Sealing
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The 4-3 and 4-7 design charts are o
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(e) 0° to 5° (Typ.) 63 Break Corn
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215 1.301 1.305 1.079 1.060 1.063 1
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Guide for Design Table 4-2 If Desir
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Parker O-Ring Handbook Gland Dimens
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Page 99 and 100: Dovetail Grooves It is often necess
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Page 103 and 104: F .031 .016 RAD K Parker O-Ring Han
Page 105 and 106: Gland Detail 0° to 5° Break Corne
Page 107 and 108: Section V - Dynamic O-Ring Sealing
Page 109 and 110: When a cylinder rod extends out int
Page 111 and 112: It can be clearly seen from Figure
Page 113 and 114: 5.11 Friction Friction, either brea
Page 115 and 116: 5-9 Dynamic O-Ring Sealing Parker H
Page 117 and 118: For the same conditions, friction a
Page 119 and 120: 5.15 Spiral Failure A unique type o
Page 121 and 122: 5.16.1 Small Amount of Leakage 1. E
Page 123 and 124: Recommended dimensions for fl oatin
Page 125 and 126: for this service. See Section II, B
Page 127 and 128: 5.30.2 Calculation of Drive Belt Cr
Page 129 and 130: Parker O-Ring Handbook Gland Design
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Page 137 and 138: X Gland Detail 0° to 5° Break Cor
Page 139 and 140: Parker O-Ring Handbook Gland Dimens
Page 141 and 142: 5.31.3 O-Ring Glands for Pneumatic
Page 143 and 144: Parker O-Ring Handbook Design Table
Page 145 and 146: 5.31.4 O-Ring Glands for Rotary Sea
Page 147 and 148: Parker O-Ring Handbook Rotary O-Rin
Page 149: Parker O-Ring Handbook Rotary O-Rin
Page 153 and 154: 6.4.2 Metal Non-Extrusion Rings In
Page 155 and 156: Parker Parbak 8-Series Dimensions (
Page 157 and 158: Parker Parbak 8-Series Dimensions (
Page 159 and 160: Back-Up Rings Cross Reference (Cont
Page 161 and 162: Parker O-Ring Handbook Section VII
Page 163 and 164: COMPOUND COMPATIBILITY RATING 1 - S
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COMPOUND COMPATIBILITY RATING 1 - S
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Section VIII - Specifi cations 8.1
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Military Fluid Specifi cation Descr
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AMS (1) and NAS (2) Rubber Specifi
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Parker O-Ring Handbook Compound Sel
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Section IX Sizes Parker Series 2-XX
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Table 9-1: Parker Series 2-XXX O-Ri
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Parker O-Ring Handbook Parker Serie
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Parker Series 5-XXX O-Ring Sizes (C
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Parker Series 5-XXX O-Ring Sizes (C
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Series 5-XXX Locator Table Size I.D
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Parker O-Ring Handbook Inside Diame
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JIS B2401 Sizes JIS Thickness Inner
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Parker O-Ring Handbook Unusual Size
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Parker O-Ring Handbook Unusual Size
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Section X - Appendix 10.1 O-Ring Fa
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10.1.1.2 Extrusion and Nibbling Ext
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10.1.1.6 Installation Damage Many O
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Parker Seal also has the capability
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10.3 Glossary of Seal and Rubber Te
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Flash: Excess rubber left around ru
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(b) REP (Roentgen equivalent-physic
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10.4 Abbreviations ACM Polyacrylate
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Compound Shrinkage Class Compound N
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Table 10-8: Dimensions From Standar
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Parker O-Ring Handbook Dimensions F
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Appendix 10-32 Parker O-Ring Handbo
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Index — A — Abbreviations. . .
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International O-Ring Standards and
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Offer of Sale 1. Terms and Conditio
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Parker’s Total inPHorm Take the g
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