Designation F1511 − 16 An American National Standard Standard Specification for Mechanical Seals for Shipboard Pump Applications1 This standard is issued under the fixed designation F1511; the number[.]
Designation: F1511 − 16 An American National Standard Standard Specification for Mechanical Seals for Shipboard Pump Applications1 This standard is issued under the fixed designation F1511; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A superscript epsilon (´) indicates an editorial change since the last revision or reapproval Scope A494/A494M Specification for Castings, Nickel and Nickel Alloy A564/A564M Specification for Hot-Rolled and ColdFinished Age-Hardening Stainless Steel Bars and Shapes A579/A579M Specification for Superstrength Alloy Steel Forgings A693 Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip A744/A744M Specification for Castings, Iron-ChromiumNickel, Corrosion Resistant, for Severe Service B62 Specification for Composition Bronze or Ounce Metal Castings B127 Specification for Nickel-Copper Alloy (UNS N04400) Plate, Sheet, and Strip B164 Specification for Nickel-Copper Alloy Rod, Bar, and Wire B166 Specification for Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, N06045, and N06696), Nickel-Chromium-CobaltMolybdenum Alloy (UNS N06617), and Nickel-IronChromium-Tungsten Alloy (UNS N06674) Rod, Bar, and Wire B168 Specification for Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, N06045, and N06696), Nickel-Chromium-CobaltMolybdenum Alloy (UNS N06617), and Nickel-IronChromium-Tungsten Alloy (UNS N06674) Plate, Sheet, and Strip B271 Specification for Copper-Base Alloy Centrifugal Castings B333 Specification for Nickel-Molybdenum Alloy Plate, Sheet, and Strip B335 Specification for Nickel-Molybdenum Alloy Rod B338 Specification for Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers B348 Specification for Titanium and Titanium Alloy Bars and Billets B367 Specification for Titanium and Titanium Alloy Castings 1.1 This specification covers mechanical end-face seals for centrifugal and positive displacement pumps for shipboard use 1.2 The following types of seals are not included in this specification: lip seals, oil seals, circumferential seals, or labyrinth seals 1.3 The values stated in inch-pound units are to be regarded as standard The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard A companion hard metric standard is in the process of preparation 1.4 Special requirements for U.S Navy Shipboard Pump Applications are included in Supplement S1 Referenced Documents 2.1 ASTM Standards:2 A108 Specification for Steel Bar, Carbon and Alloy, ColdFinished A182/A182M Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service A240/A240M Specification for Chromium and ChromiumNickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications A276 Specification for Stainless Steel Bars and Shapes A313/A313M Specification for Stainless Steel Spring Wire A351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts A436 Specification for Austenitic Gray Iron Castings This specification is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of Subcommittee F25.11 on Machinery and Piping Systems Current edition approved Nov 1, 2016 Published November 2016 Originally approved in 1994 Last previous edition approved in 2014 as F1511 – 14 DOI: 10.1520/F1511-16 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 United States F1511 − 16 2.5 ISO Standard:4 ISO 9001 Quality Systems—Model for Quality Assurance in Design/Development, Production, Installation, and Service 2.6 SAE Standards:6 AMS 7259 Rings, Sealing, Fluorocarbon (FKM) Rubber High-Temperature—Fluid Resistant Low Compression Set 85 to 95 AMS 7276 Rings, Sealing, Fluorocarbon (FKM) Rubber High-Temperature—Fluid Resistant Low Compression Set 70 to 80 AMS 3216 Fluorocarbon (FKM) Rubber, HighTemperature—Fluid Resistant, Low Compression, Set 70 to 80 AMS 3218 Fluorocarbon (FKM) Rubber, HighTemperature—Fluid Resistant, Low Compression, Set 85 to 95 J1926-1 Standard Dimensions for Gasket Seal Straight Thread Tube Fitting 2.7 Other Document: DS56I Metals and Alloys in the Unified Numbering System B443 Specification for Nickel-Chromium-MolybdenumColumbium Alloy(UNS N06625) and Nickel-ChromiumMolybdenum-SiliconAlloy (UNS N06219) Plate, Sheet, and Strip B446 Specification for Nickel-Chromium-MolybdenumColumbium Alloy (UNS N06625), Nickel-ChromiumMolybdenum-Silicon Alloy (UNS N06219), and NickelChromium-Molybdenum-Tungsten Alloy (UNS N06650) Rod and Bar B472 Specification for Nickel Alloy Billets and Bars for Reforging B473 Specification for UNS N08020, UNS N08024, and UNS N08026 Nickel Alloy Bar and Wire B505/B505M Specification for Copper Alloy Continuous Castings B584 Specification for Copper Alloy Sand Castings for General Applications B637 Specification for Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service B670 Specification for Precipitation-Hardening Nickel Alloy (UNS N07718) Plate, Sheet, and Strip for HighTemperature Service D1141 Practice for the Preparation of Substitute Ocean Water D1418 Practice for Rubber and Rubber Latices— Nomenclature D3294 Specification for Polytetrafluoroethylene (PTFE) Resin Molded Sheet and Molded Basic Shapes D3951 Practice for Commercial Packaging Terminology 3.1 Refer to Annex A1 for terminology relating to mechanical seals Classification of Seal Arrangements 4.1 For this specification, mechanical seals shall be classified by type, grade, and class The categories are divided by application arrangement in the equipment in which it is installed: 4.1.1 Type A—Inside Single Mounted Seals 4.1.2 Type B—Outside Single Mounted Seals 4.1.3 Type C—Double Seals 4.1.4 Type D—Tandem Seals 4.1.5 Type E—Gas Seals 4.1.6 Type F—Special Arrangements/Applications Vacuum or Gas Seal 4.1.7 Grade 1—Basic End Face Seal 4.1.8 Grade 2—Cartridge Seal 4.1.9 Grade 3—Split Seal 4.1.10 Class 0—Nonsplit Seal Assembly 4.1.11 Class 1—Partial Split Seal Assembly, Solid Gland 4.1.12 Class 2—Partial Split Seal Assembly, Split Gland 4.1.13 Class 3—Fully Split Seal Assembly, Solid Gland 4.1.14 Class 4—Fully Split Seal Assembly, Split Gland 4.2 Figs 1-6 give general orientation information for various types of seals The specific design of seal shown is not limited to that particular application 2.2 ASQ Standards:3 ASQC Z1.4 American Society of Quality, Quality Conformance Inspection 2.3 ANSI Standards:4 ANSI Y14.1 Drawing Sheet Size and Format ANSI Y14.2 Line Convention and Lettering ANSI Y14.3 Multi and Sectional View Drawings ANSI Y14.5 Dimensioning and Tolerancing for Engineering Drawings ANSI Y14.6 Screw Thread Representation ANSI Y14.26.3 Computer-Aided Preparation of Production Definition Data, Terms and Definitions 2.4 Military Standards:5 MIL-S-901 Shock Tests, H.I (High Impact); Shipboard Machinery, Equipment & Systems, Requirements for MIL-P-16789 Packaging of Pumps, Including Prime Movers and Associated Repair Parts MIL-STD-167-1 Environmental Vibration Testing Ordering Information 5.1 The purchaser (buyer) shall provide the manufacturer with all of the pertinent application data shown in Figs 7-9 If special operating conditions exist that are not shown in the checklist, they shall also be described Available from American Society for Quality (ASQ), 600 N Plankinton Ave., Milwaukee, WI 53203, http://www.asq.org Available from American National Standards Institute (ANSI), 25 W 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org Available from Standardization Documents Order Desk, DODSSP, Bldg 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:// dodssp.daps.dla.mil Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org F1511 − 16 FIG Single Seal—Inside Bellows Secondary Seal, Classification Type A Grade FIG Single Seal—Inside O-Ring Secondary Seal, Classification Type A Grade 6.2 Metal Components: 6.2.1 Mechanical seal metal parts in contact with the pumped liquid shall be compatible with their environment 6.2.2 Table identifies metal component compatibility 6.2.3 Material specifications: Material 6.1 Mechanical seals shall be constructed of materials selected from Tables 1-3 after reviewing temperature, pressure/ velocity (PV), and corrosion resistance requirements for all parts for each application F1511 − 16 FIG Single Seal—Outside Mounted Classification Type B Grade FIG Double Seals—Back to Back Classification Type C Grade F1511 − 16 FIG Double Seals—Face to Face Classification Type C Grade FIG Tandem Seals Classification Type D Grade F1511 − 16 Material Copper alloy Bronze Alloy 20 316 stainless steel 304 stainless steel Alloyed stainless steel (cast) 17-4 PH AM 350 NiCuA NiMo NiMoB (Alloy B) NiCrFeC NiCrMoCo NiCr NiCrMoCbD Steel Austenetic grey iron Titanium Nickel cast iron (ductile nodular or graphitic) ASTM B271, B584, B505/B505M B62 B472 and B473 (UNS N08020, N08026) A240/A240M, A276, and A313/A313M (UNS S316XX) A182/A182M, A313/A313M (UNS S304XX),A351/A351M (CF3, 3A; CF8,8A; CF8C; CF10) A744/A744M (CN-7M, CN-7MS) A564/A564M and A693 (UNS S17400) A579/A579M (Grade 61) B164 (UNS N04400, N04405), B127, A494/A494M (Grades M35-1, M35-2,M-30H, M-25S) A494/A494M (Grades CW-2M, N-12 MV) B333 and B335 (UNS N10001, N10665, N10675) B166, B168 B637, B670 B443, B446 A108 A436 B338, B348, B367 A436 Type A Monel7 or equivalent has been found satisfactory for this purpose Hastelloy B or equivalent has been found satisfactory for this purpose C Inconel X7508 or equivalent has been found satisfactory for this purpose D Inconel 6258 or equivalent has been found satisfactory for this purpose B 6.3 Face Materials—Mechanical seal-wearing faces shall be selected to provide the desired performance and corrosion resistance for the specified design life of the seal 6.3.1 Performance ranges for face combinations are listed in Table 6.3.2 Face materials shall be of solid construction only; no overlays, deposited coatings, or sprayed on coatings are permitted 6.3.3 Carbon is preferred for one of the faces unless the service is abrasive, dirty, or chemically active 6.3.4 For special service requirements, hard on hard seal face combinations may be required Face material combinations, such as silicon carbide versus silicon carbide, silicon carbide versus tungsten carbide, and tungsten carbide versus tungsten carbide, may be used as similar or dissimilar contacting face materials when recommended by the supplier and approved by the user FIG Ordering Data Checklist 6.4 Face Material Specifications: 6.4.1 Carbon—Suitable for service as recommended by the manufacturer A carbon seal grade is a material having carbonaceous filler system comprised of pitch and resins, compacted and baked to a final temperature These grades are subsequently impregnated with resin until they become impervious All available carbons may not be suitable for a particular application Carbons considered for use in a particular application shall be checked for suitability in accordance with the requirements of this specification 6.4.2 Tungsten Carbide—6 to 10 % nickel or cobalt-bound solid tungsten carbide The term “Monel” and the Monel logo are trademarks of the Special Metals Corporation, Huntington, WV, USA The term “Inconel” and the Inconel logo are trademarks of the Special Metals Corporation, Huntington, WV, USA F1511 − 16 FIG Stuffing Box Arrangement F1511 − 16 FIG Stuffing Box Dimensions TABLE Metal Component Compatibility NOTE 1—For fluids or materials not covered here, seal selection to be mutually agreed upon by seal manufacturer, pump supplier, and end user NOTE 2— X = Suitable for use as seal components MaterialsA Fluid Fresh Water Demineralized water Boiler feed Potable Brass X Ni-Cu Alloy 20 Highly Alloyed Stainless Steel Ni-Mo Ni-Cr-Mo-Cb Ni-Cr-Fe X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 316 Stainless Steel X X X Salt Water Seawater Distiller brine Fuel Oil Navy distillate JP-5 Diesel Kerosene Crude oil Lube oil Sewage A See Section for material specifications 6.4.3 Ceramic—99.5 % minimum alumina ceramic suitable for the service as recommended by the manufacturer 6.4.4 Silicon Carbide—(a) Reaction-Bonded—Solid finegrained reaction-bonded silicon carbide to 12 % free silicon, essentially free of carbon, impervious structure requiring no impregnant (b) Reaction-Bonded With Graphite—A composite material of fine-grain reaction-bonded silicon carbide; to 10 % free silicon and 10 to 30 % graphite; impervious structure requiring no impregnant (c) Direct Sintered—Solid homogeneous silicon carbide essentially free of silicon and carbon, impervious structure requiring no impregnant (d) Direct Sintered Silicon Carbide—Contains 10 % free graphite (e) Siliconized Carbon Graphite—Approximately 0.025-in (0.64- mm) thick conversion of silicon carbide on carbon substructure and impregnated with thermosetting resin 6.5 Elastomeric Materials: 6.5.1 Special care should be given to the selection and installation of elastomeric components, such as bellows and O-rings One of the most important considerations for elastomers is fluid compatibility Table references most shipboard applications Consult the seal manufacturer for fluids not listed 6.5.2 Material Classification/Specification: 6.5.2.1 Nitrile—Practice D1418, Class Designation NBR 6.5.2.2 Chloroprene—Practice D1418, Class Designation CR F1511 − 16 TABLE Seal Face Materials then the seal should be inspected for nicked or cut O-rings, misaligned seal faces halves, chipped or cracked seal faces, or any other issues that may cause the leakage 7.1.4 In special applications of extreme environmental parameters, such as high temperature with limited cooling, high pressure/velocity, extreme abrasion, unusual equipment vibration, shaft end-play, or run-out, the pump and seal manufacturers shall agree upon the best achievable minimum operating life requirements and leakage performance 7.1.5 Double or special seal arrangements may be required in applications in which zero product leakage to the environment is required such as hazardous fluids, fuel oil, acids, chemicals, and sewage Consult the seal manufacturer for recommendations NOTE 1—Faces for chemically active materials and special applications shall be agreed upon by seal manufacturer and end user Seal Face Compatibility Chart Primary Ring Carbon Carbon Carbon Siliconized carbon Siliconized carbon Silicon carbide Silicon carbide Tungsten carbide Mating Ring PV Limit,A lb/in.2 × ft/min (MPa·m/s) Tungsten carbide Silicon carbide CeramicB Tungsten carbide Silicon carbide Tungsten carbide Silicon carbide Tungsten carbide 500 000 (17.75) 500 000 (17.75) 100 000 (3.55) 350 000 (12.43) 350 000 (12.43) 300 000 (10.65) 350 000 (12.43) 120 000C (4.26) A Values of PV apply to aqueous solutions at 120°F (49°C) For lubricating liquids, such as oil, 60 % higher can be used Given limits are to be used as a general guide in material selection Values used consider a pressure drop across the seal faces as 0.5 B Limited to chemical service requirements only C PV limit of 185 000 (6.57) can be used with two different grades of tungsten carbide, that is, cobalt versus nickel binders Design Requirements 8.1 Installation Arrangements: 8.1.1 Type A mechanical seals shall be provided unless otherwise specified 8.1.2 Tandem or double mechanical seals may be installed in special applications in which it is determined that a buffer fluid system is required for lubrication, containment, or safety 6.5.2.3 Fluorocarbon—Practice D1418, Class Designation FKM 6.5.2.4 Ethylene Propylene (EP)—Practice D1418, Class Designation EPM/EPDM 6.5.2.5 Perfluoroelastomer—Practice D1418, Class Designation FFKM 6.5.2.6 Polytetrafluorethylene (PTFE)—Specification D3294 6.5.2.7 Corrugated graphite ribbon packing 6.5.3 Ethylene propylene (EP) rubber shall not be lubricated with any petroleum base substances Check Section 11 and Appendix X1 or manufacturer’s recommendations before using any lubricant 8.2 Finish and tolerance requirements for primary seal ring and mating ring surface flatness of Class mechanicals seals shall be three light bands or better as measured under a monochromatic, helium light source 8.3 Requirements for Installation of Classes Through Split Mechanical Seals: 8.3.1 Classes through 4, split mechanical seals, may be furnished for shaft/sleeve diameters of 11⁄2 in (38.1 mm) and above 8.3.2 For split mechanical seal installations, a minimum of in (76.2 mm) of axial space, measured from the stuffing box face to the first obstruction, shall be provided for Classes and seals Additional space, at least equal to the gland thickness, may be required for Classes and seals 8.3.3 Classes through 4, split mechanical seals, shall be designed to operate under a minimum reverse differential pressure condition of 15-in Hg (50.8 kPa) Performance Requirements 7.1 Seal life shall be defined in terms of the time period in which the mechanical seal functions properly under its specified service 7.1.1 The minimum operational life of a mechanical seal shall be 16 000 statistical hours provided that the equipment is maintained and operated in accordance with the requirements of Section 7.1.2 During any portion of the service life, the dynamic leakage shall not exceed five drops per minute for Class seals After initial installation, hydrostatic leakage shall be zero for a 5-min period, when the equipment is subjected to system pressure 7.1.3 All split mechanical seals, Classes through 4, may experience higher leakage rates than Class 0, solid mechanical seals A leakage rate of five drops per minute shall be acceptable after completion of the manufacturer’s recommended break-in period 7.1.3.1 Some leakage may occur between the seal faces upon startup If leakage is less than 30 drops a minute this should improve as the faces “run-in.” If leakage is greater than 30 drops a minute, then the seal, equipment, or the operating conditions, or combination thereof, should be examined to determine the probable cause for the leakage If the seal installation is determined to be the root cause of the leakage, 8.4 The requirement for a balanced or unbalanced seal will vary dependent upon the combination of various design and performance factors Balanced seals shall normally be supplied for pressures greater than 150 psi (1.03 MPa) unless the seal manufacturer provides alternative recommendations for specific applications Selection of a balanced or unbalanced seal design must satisfy the performance requirements of Section 8.5 The mechanical seal shall be designed to operate satisfactorily under the following: 8.5.1 Shaft or sleeve surface finish for pusher-type seals shall be 32 rms (0.80 µm) maximum Shaft or sleeve surface finish non-pusher seals should be 32 to 64 rms (0.80 to 1.60 µm) 8.5.2 Shaft radial run-out to be 0.002 in (0.0508 mm) TIR per inch of sleeve or shaft diameter, add 0.001 in (0.0254 mm) TIR per inch greater than 2.000 in shaft or sleeve diameter 8.5.3 Shaft end-play maximum 60.015 in (0.38 mm) F1511 − 16 TABLE Elastomer Compatibility NOTE 1—X = Suitable for fluids within temperature range indicated Fluid Temp Limits: Min Max Nitrile-N −50°F (−46°C) +250°F (121°C) FluorocarbonA −25°F (−32°C) +400°F (204°C) PTFEB −150°F (−101°C) +500°F (260°C) Corrugated Graphite Ribbon −400°F (−46°C) +750°F (400°C) EP −50°F (−46°C) +300°F (149°C) Chloroprene −50°F (−46°C) +200°F (93°C) X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Fresh Water Demineralized water Boiler feedwater Potable water Salt Water Seawater Distiller brine Fuel and Lubricants Navy distillate JP-5 Bunker C Diesel oil Kerosene Lube oil (mineral base) Sewage X X X X X X X X X X X X X A Fluorocarbon shall be limited to 275°F (135°C) in water B Care should be used in selecting PTFE Its use is only dictated when other elastomers are not suitable and PTFE is acceptable PTFE is not acceptable for nuclear service, or in a radiation area Glass-filled PTFE has a temperature range of −350°F (−212°C) to +500°F (260°C) 9.5.1 Acceptable Quality Level for Characteristics—The acceptable quality levels for characteristics, as in accordance with ASQC Z1.4, shall be as follows: 9.5.1.1 Critical—1.5 AQL 9.5.1.2 Major—2.5 AQL 9.5.1.3 Minor—4.0 AQL 9.5.2 Tests—All tests shall be performed in accordance with ASTM, ASME, or manufacturer’s standards as specified 9.5.3 Test Data—All test data shall remain on file at the manufacturer’s facility for review by buyer upon request It shall be retained in the manufacturer’s files for at least three years 8.5.4 Concentricity of stuffing box bore to shaft axis 0.005 in (0.13 mm) TIR maximum Gland plate design must accommodate eccentricity stated herein 8.5.5 Perpendicularity of stuffing box face to shaft axis 0.003 in (0.08 mm) TIR maximum 8.6 Environmental Controls—Environmental control considerations, such as flushing, cooling, heating, and quenching shall be specified by the seal manufacturer Quality Assurance Provisions 9.1 Quality Systems—Mechanical seals shall be supplied in accordance with ISO 9001 9.2 Responsibility for Inspection—Unless otherwise specified, the manufacturer is responsible for the performance of all inspection requirements The manufacturer may use his own or any other facilities suitable for inspection The purchaser (buyer) reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements 9.6 Inspection of Packaging: 9.6.1 Unit of Product—For the purpose of inspection, a completed package prepared for shipment shall be considered as a unit of product 9.6.2 Sampling—Sampling for examination shall be in accordance with ASQC Z1.4 The AQL shall be 4.0 % defective 9.6.3 Examination—Samples selected in accordance with 9.5.2 shall be examined for the following defects: 9.6.3.1 Materials, methods, container, 9.6.3.2 Strapping, 9.6.3.3 Consolidated seals not of like description, and 9.6.3.4 Marking illegible, incorrect, incomplete, or missing 9.3 Material Inspection—The manufacturer shall be responsible for ensuring that materials used are manufactured, examined, and tested in accordance with the specifications and standards as applicable 9.4 Classification of Inspections—The inspection requirements specified herein shall be classified as follows: 9.4.1 Quality Conformance Inspection 9.4.2 Inspection of Packaging 9.7 Warranty: 9.7.1 Responsibility for Warranty—Unless otherwise specified, the manufacturer is responsible for the following: 9.7.1.1 All materials used to produce a unit, 9.7.1.2 Workmanship, and 9.7.1.3 Manufacturer will warrant his product to be free from defect of workmanship 9.5 Quality Conformance Inspection—All seal components shall be inspected in accordance with ASQC Z1.4 listing critical, major, and minor characteristics and type of inspection equipment used to determine said characteristics 10 F1511 − 16 TABLE S5.1 Standard Long Mechanical Seal NOTE 1—Standard (long) mechanical seal dimensions for Navy shipboard pump applications (low pressure, 150 psi (1.03 MPa) max, for new or replacement applications) A± 0.002 (A') ± 0.05 B± 0.002 (B') ± −0.05 C REF (C') REF D (D') 0.375 9.52 0.875 22.23 0.438 11.13 1.062 26.98 0.500 12.70 1.000 25.40 0.563 14.30 1.187 30.15 0.625 15.87 1.250 31.75 0.688 17.48 1.343 34.12 0.750 19.05 1.375 34.93 0.813 20.65 1.468 37.29 0.875 22.22 1.500 38.10 0.938 23.83 1.656 42.07 1.000 25.40 1.625 41.28 1.063 27.00 1.750 44.45 1.125 28.57 1.750 44.45 1.188 30.18 1.870 47.50 1.250 31.75 1.875 47.63 1.313 33.35 2.000 50.80 1.375 34.92 2.000 50.80 1.438 36.53 2.125 53.98 1.500 38.10 2.125 53.98 1.563 39.70 2.250 57.15 1.625 41.27 2.375 60.33 1.688 42.88 2.500 63.50 1.750 44.45 2.500 63.50 1.813 46.05 2.625 66.68 1.875 47.62 2.625 66.68 1.938 49.23 2.750 69.85 2.000 50.80 2.750 69.85 2.063 52.40 2.937 74.60 2.125 53.97 3.000 76.20 2.188 55.58 3.125 79.38 2.250 57.15 3.125 79.38 2.313 58.75 3.250 82.55 2.375 60.32 3.250 82.55 2.438 61.93 3.375 85.73 2.500 63.50 3.375 85.73 2.563 65.10 3.500 88.90 2.625 66.67 3.375 85.73 2.688 68.28 3.750 95.25 2.750 69.85 3.500 88.90 2.813 71.45 3.875 98.43 2.875 73.02 3.750 95.25 2.938 74.63 4.000 101.60 3.000 76.20 3.875 98.43 3.125 79.38 4.187 106.35 3.125 79.37 4.000 101.60 3.250 82.55 4.437 112.70 3.250 82.55 4.125 104.78 3.375 85.73 4.562 115.88 3.375 85.72 4.250 107.95 3.500 88.90 4.687 119.05 3.500 88.90 4.375 111.13 3.625 92.08 4.812 122.23 3.625 92.07 4.500 114.30 3.750 95.25 4.937 125.40 3.750 95.25 4.625 117.48 3.875 98.43 5.062 128.58 3.875 98.42 4.750 120.65 4.000 101.60 5.187 131.75 4.000 101.60 4.875 123.83 4.125 104.78 5.312 134.93 Notes: A to N = English units A' to N' = SI (metric) units (I) For mating ring antirotation slot detail see Fig S5.2 (II) B—Gland counterbore C—Min shaft clearance bore recommended tolerance +0.030 (0.076)/–0.000 D—Min stuffing box bore E—Max seal O.D (within stuffing box) Mechanical Seals, and Table S5.2, Standard Short Mechanical Seals, shall be of the single spring elastomeric bellows type Slot details for antirotation pins applicable to Tables S5.1 and S5.2 are shown in Fig S5.2 S5.2 Pusher type seals may be used for hydraulic oils, fuels, and lubricants E max (E') max L± 0.020 (L') ± −0.5 (M) ± 0.005 (M') ± 0.12 (N) ± 0.15 (N') ± 0.38 0.937 1.062 1.218 1.343 1.531 1.625 1.745 1.875 2.000 2.125 2.375 2.500 2.625 2.812 3.000 3.125 3.250 3.375 3.625 3.750 3.875 4.062 4.250 4.375 4.500 4.625 4.750 4.875 5.000 5.125 23.80 26.97 30.93 34.11 38.88 41.27 44.32 47.62 50.80 53.97 60.32 63.50 66.67 71.42 76.20 79.37 82.55 85.72 92.07 95.25 98.42 103.17 107.95 111.12 114.30 117.47 120.65 123.82 127.00 130.17 1.188 1.188 1.312 1.312 1.375 1.562 1.625 1.625 1.687 1.687 2.000 2.000 2.125 2.125 2.375 2.375 2.500 2.500 2.750 2.750 2.875 2.875 3.125 3.125 3.125 3.125 3.250 3.250 3.375 3.375 30.2 30.2 33.3 33.3 34.9 39.7 41.3 41.3 42.9 42.9 50.8 50.8 54.0 54.0 60.3 60.3 63.5 63.5 69.8 69.8 73.0 73.0 79.4 79.4 79.4 79.4 82.6 82.6 85.7 85.7 0.250 0.250 0.344 0.344 0.344 0.375 0.375 0.375 0.375 0.375 0.438 0.438 0.438 0.438 0.500 0.500 0.500 0.500 0.562 0.562 0.562 0.562 0.656 0.656 0.656 0.656 0.656 0.656 0.656 0.656 6.35 6.35 8.74 8.74 8.74 9.53 9.53 9.53 9.53 9.53 11.13 11.13 11.13 11.13 12.70 12.70 12.70 12.70 14.30 14.30 14.30 14.30 16.66 16.66 16.66 16.66 16.66 16.66 16.66 16.66 0.312 0.312 0.406 0.406 0.406 0.438 0.438 0.438 0.438 0.438 0.500 0.500 0.500 0.500 0.562 0.562 0.562 0.562 0.625 0.625 0.625 0.625 0.781 0.781 0.781 0.781 0.781 0.781 0.781 0.781 7.92 7.92 10.31 10.31 10.31 11.13 11.13 11.13 11.13 11.13 12.70 12.70 12.70 12.70 14.27 14.27 14.27 14.27 15.87 15.87 15.87 15.87 19.84 19.84 19.84 19.84 19.84 19.84 19.84 19.84 S5.3 Mechanical seals to Tables S5.1-S5.4 shall be axially positioned or located on the shaft by positive means such as a stub, step, or shoulder on the shaft or a sleeve that is positively located on the shaft S5.4 Mechanical seals to Tables S5.1-S5.4 shall not be axially positioned by the use of set screws 12 F1511 − 16 TABLE S5.2 Standard Short Mechanical Seal NOTE 1—Standard (short length), mechanical seal dimensions for Navy shipboard pump applications (low pressure, 150 psi (1.03 MPa) max, for new or replacement applications) A± 0.002 (A') ± 0.05 B± 0.002 (B') ± −0.05 C REF (C') REF D (D') E max (E') max L± 0.020 (L') ± −0.5 (M) ± 0.005 (M') ± 0.12 (N) ± 0.15 (N') ± 0.38 0.375 9.52 0.875 22.23 0.438 11.13 1.218 30.94 0.500 12.70 1.000 25.40 0.563 14.30 1.375 34.93 0.625 15.87 1.250 31.75 0.688 17.48 1.562 39.68 0.750 19.05 1.375 34.93 0.813 20.65 1.687 42.85 0.875 22.22 1.500 38.10 0.938 23.83 1.812 46.03 1.000 25.40 1.625 41.28 1.063 27.00 2.000 50.80 1.125 28.57 1.750 44.45 1.188 30.18 2.125 53.98 1.250 31.75 1.875 47.63 1.313 33.35 2.250 57.15 1.375 34.92 2.000 50.80 1.438 36.53 2.437 61.90 1.500 38.10 2.125 53.98 1.563 39.70 2.562 65.08 1.625 41.27 2.375 60.33 1.688 42.88 2.937 74.60 1.750 44.45 2.500 63.50 1.813 46.05 3.062 77.78 1.875 47.62 2.625 66.68 1.938 49.23 3.187 80.95 2.000 50.80 2.750 69.85 2.063 52.40 3.312 84.13 2.125 53.97 3.000 76.20 2.188 55.58 3.625 92.08 2.250 57.15 3.125 79.38 2.313 58.75 3.750 95.25 2.375 60.32 3.250 82.55 2.438 61.93 3.875 98.43 2.500 63.50 3.375 85.73 2.563 65.10 4.000 101.60 2.625 66.67 3.375 85.73 2.688 68.28 4.312 109.53 2.750 69.85 3.500 88.90 2.813 71.45 4.437 112.70 2.875 73.02 3.750 95.25 2.938 74.63 4.562 115.88 3.000 76.20 3.875 98.43 3.125 79.38 4.687 119.05 3.125 79.37 4.000 101.60 3.250 82.55 5.000 127.00 3.250 82.55 4.125 104.78 3.375 85.73 5.125 130.18 3.375 85.72 4.250 107.95 3.500 88.90 5.250 133.35 3.500 88.90 4.375 111.13 3.625 92.08 5.500 139.70 3.625 92.07 4.500 114.30 3.750 95.25 5.687 144.45 3.750 95.25 4.625 117.48 3.875 98.43 5.812 147.63 3.875 98.42 4.750 120.65 4.000 101.60 6.000 152.40 4.000 101.60 4.875 123.83 4.125 104.78 6.125 155.58 Notes: A to N = English units A' to N' = SI (metric) units (I) For mating ring antirotation slot detail see Fig S5.2 (II) B—Gland counterbore C—Min shaft clearance bore recommended tolerance +0.030 (0.076)/–0.000 D—Min stuffing box bore E—Max seal O.D (within stuffing box) 1.031 1.187 1.375 1.500 1.625 1.812 1.937 2.062 2.250 2.375 2.718 2.750 2.875 3.000 3.250 3.375 3.500 3.625 3.875 4.000 4.125 4.250 4.562 4.687 4.812 4.937 5.125 5.250 5.437 5.562 26.18 30.15 34.92 38.10 41.27 46.02 49.20 52.37 57.15 60.32 69.03 69.85 73.02 76.20 82.55 85.72 88.90 92.07 98.42 101.60 104.77 107.95 115.87 119.05 122.22 125.40 130.17 133.35 138.10 141.27 0.812 0.812 0.875 0.875 0.937 1.000 1.062 1.062 1.125 1.125 1.375 1.375 1.500 1.500 1.687 1.687 1.812 1.812 1.937 1.937 2.062 2.062 2.187 2.187 2.187 2.187 2.312 2.312 2.437 2.437 20.7 20.7 22.7 22.7 23.8 25.4 27.0 27.0 28.6 28.6 34.9 34.9 38.1 38.1 42.9 42.9 46.0 46.0 49.2 49.2 52.4 52.4 55.6 55.6 55.6 55.6 58.8 58.8 61.9 61.9 0.250 0.250 0.344 0.344 0.344 0.375 0.375 0.375 0.375 0.375 0.438 0.438 0.438 0.438 0.500 0.500 0.500 0.500 0.562 0.562 0.562 0.562 0.656 0.656 0.656 0.656 0.656 0.656 0.656 0.656 6.35 6.35 8.74 8.74 8.74 9.53 9.53 9.53 9.53 9.53 11.13 11.13 11.13 11.13 12.70 12.70 12.70 12.70 14.30 14.30 14.30 14.30 16.66 16.66 16.66 16.66 16.66 16.66 16.66 16.66 0.312 0.312 0.406 0.406 0.406 0.438 0.438 0.438 0.438 0.438 0.500 0.500 0.500 0.500 0.562 0.562 0.562 0.562 0.625 0.625 0.625 0.625 0.781 0.781 0.781 0.781 0.781 0.781 0.781 0.781 7.92 7.92 10.31 10.31 10.31 11.13 11.13 11.13 11.13 11.13 12.70 12.70 12.70 12.70 14.27 14.27 14.27 14.27 15.87 15.87 15.87 15.87 19.84 19.84 19.84 19.84 19.84 19.84 19.84 19.84 S5.5 Any special tools or spacers required to install and remove a mechanical seal shall be included with the seal S5.6 Mechanical seals supplied in accordance with Table S5.5 shall meet the following requirements: S5.6.1 Table S5.5 mechanical seals may use setscrews to position the seal S5.6.2 A throttle bushing or secondary containment seal shall be used to limit leakage in event of seal failure The diametrical clearance of the throttle bushing bore shall not be more than 0.025 in for sleeve diameters up to 2.0 in For larger diameters, the maximum diametrical clearance shall be 0.025 in plus 0.005 in for each additional 1.0 in of diameter or fraction thereof Mechanical seals used for lube oil and fuel services may use backup packing instead of throttle bushings S5.6.3 Non-sparking metallic assembly clips shall be used S5.6.4 Throttle bushing drain and seal flushing connections shall be provided with straight “O” ring fittings to MS 16142, minimum size 3⁄8-in S5.7 Mechanical seals supplied in accordance with Table S5.6 shall meet the following requirements: S5.7.1 No provision for back-up packing is required for split mechanical seals unless requested by the customer 13 F1511 − 16 TABLE S5.3 Special Cartridge Seals Grade A± 0.002 1.186 1.377 1.436 1.771 J (A') ± 0.05 B± 0.002 (B') ± 0.05 C Ref (C') Ref D (D') E max (E') max E (F') G (G') H max (H') max 30.12 34.98 36.47 44.98 3.066 3.066 3.877 3.877 77.88 77.88 98.48 98.48 2.726 2.726 3.416 3.416 69.24 69.24 86.77 86.77 2.44 2.44 2.94 2.94 61.98 61.98 74.68 74.68 2.348 2.420 2.763 2.861 59.64 61.47 70.18 72.67 1.29 1.51 1.54 2.00 32.77 38.35 39.12 50.80 0.19 0.31 0.19 0.12 4.83 7.87 4.83 3.05 0.50 0.50 0.62 0.62 12.70 12.70 15.75 15.75 (J') K (K') L± 020 (L') ± 0.5 2.82 71.63 00 00 0.741 18.82 2.82 71.63 0.18 4.57 0.794 20.17 3.56 90.42 00 00 0.820 20.83 3.56 90.42 00 00 0.877 22.28 Notes: A to R = English units A' to R' = SI (metric) units B—Gland counterbore C—Seal support shoulder tolerance +0.030 (0.76)/−0.000 D—Minimum stuffing box bore E—Maximum seal O.D (within stuffing box) F—Positive drive recess for seal assembly drive lug each 180° apart G—Positive drive recess for seal assembly drive lug each 180° apart H—Maximum pin length shown, max pin diameter 0.125 J—Positive drive recess for stationary seal ring K—Clearance required between seal and seal locating shoulder R—Four lugs equally spaced at 90° M± 0.005 (M') ± 0.13 N± 0.015 (N') ± 0.38 Q (Q') R max (R') max 0.340 0.340 0.380 0.380 8.64 8.64 9.65 9.65 0.408 0.408 0.408 0.408 10.36 10.36 10.36 10.36 0.25 0.31 0.31 0.31 6.35 7.87 7.87 7.87 0.38 0.38 0.50 0.50 9.65 9.65 12.70 12.70 hydrostatic test pressure shall not exceed the maximum pressure rating of the split mechanical seal S5.8 Type E mechanical seals shall be the non-contacting design where the mating faces are designed to intentionally create aerodynamic or hydrodynamic separating forces to sustain a specific separation gap S5.7.2 Split mechanical seals shall not be used for fuel or lube oil service pumps S5.7.3 Mechanical seals supplied in accordance with Table S5.6 may leak at the seal faces during hydrostatic testing of the pump Leakage should not constitute failure of the hydrostatic test of the pump or failure of the split mechanical seal Pump 14 F1511 − 16 TABLE S5.4 Special Cartridge Seals Grade A± 0.002 0.811 1.000 1.876 2.162 2.750 J (A') ± 0.05 B± 0.002 (B') ± 0.05 C Ref (C') Ref D (D') E max (E') max E (F') G (G') H max (H') max 20.60 25.40 47.65 54.91 69.85 1.851 1.877 2.752 3.127 4.002 47.02 47.68 69.90 79.43 10.17 1.605 1.100 2.100 2.218 2.875 40.77 27.94 53.34 56.34 73.03 1.67 2.09 3.36 3.60 4.47 42.42 53.09 85.34 91.44 113.54 1.583 2.011 3.315 3.252 4.310 40.21 51.08 84.20 82.60 109.47 0.94 1.10 2.00 2.38 3.05 23.88 27.94 50.80 60.45 77.47 0.12 0.09 0.21 0.31 0.44 3.02 2.29 5.33 7.87 11.18 NA 0.13 0.18 0.18 0.10 NA 3.30 4.57 4.57 2.54 (J') K (K') L± 020 (L') ± 0.5 M± 0.005 (M') ± 0.13 NA NA 0.190 4.83 0.679 17.25 0.280 7.11 1.44 36.58 000 000 0.590 14.99 0.250 6.35 2.34 59.44 0.250 6.35 0.868 22.05 0.250 6.35 2.70 68.58 0.595 15.11 0.770 19.56 0.280 7.11 3.44 87.38 0.250 6.35 1.002 25.45 0.280 7.11 Notes: A to S = English units A' to S' = SI (metric) units B—Gland counterbore C—Seal support shoulder tolerance + 0.030 (0.76)/−0.000 D—Minimum stuffing box bore E—Maximum seal O.D (within stuffing box) F—Positive drive recess for seal assembly drive lug each 180° apart G—Positive drive recess for seal assembly drive lug each 180° apart H—Maximum pin length shown, max pin diameter 0.125 J—Positive drive recess for stationary seal ring K—Clearance required between seal and seal locating shoulder each 180° apart R—One recess only N/A—Not applicable N± 0.015 (N') ± 0.38 Q (Q') R max (R') max S max (S') 0.362 0.317 0.437 0.375 0.500 9.19 8.05 11.10 9.53 12.70 0.19 0.25 0.31 0.31 0.44 4.83 6.35 7.87 7.87 11.18 NA 0.38 0.38 0.38 0.38 NA 9.65 9.65 9.65 9.65 NA 0.190 0.128 0.254 0.230 NA 1.83 3.25 6.45 5.84 S5.8.3 A self-contained gas seal support system (GSSS) shall be provided The GSSS shall include check valve, gas regulator, pressure gage, and flowmeter The GSSS components shall be enclosed in a box to protect from the elements Flow and pressure indicators shall be visible from the outside of the box GSSS shall be used to support the Type E seal S5.8.1 Type E seals shall be used only on fuel/oil services with a shaft speed greater than 300 ft per (fpm) measured at the shaft diameter S5.8.2 Nodular or graphitic ductile nickel cast iron mating rings allowed in accordance with Table S5.7 are not permitted in Type E seals 15 F1511 − 16 TABLE S5.5 Cartridge Seal A Shaft Size 1.000 1.125 1.250 1.375 1.500 1.625 1.750 1.875 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 Maximum Dimensions for Seal Installation D F E Box Bolt Nearest Depth Circle Obstruction min Bolt Size 3⁄8 in 0.91 2.11 2.88 0.66 2.13 2.88 0.78 2.13 3.14 0.69 2.13 3.26 0.96 2.19 3.48 1.02 2.19 N/A 1.04 2.19 N/A 1.04 2.19 N/A 1.27 2.38 N/A 1.27 2.38 N/A 1.39 2.38 N/A 1.13 2.53 N/A 1.39 2.63 N/A 1.60 2.56 N/A 1.60 2.56 N/A 1.60 2.56 N/A 1.74 2.63 N/A 1.75 2.69 N/A 1.80 2.64 N/A 1.94 2.69 N/A 1.91 2.69 N/A 2.19 2.69 N/A 2.00 2.69 N/A 2.06 2.69 N/A 2.38 2.69 N/A B Gland OD C Box Bore C Box Bore max 4.11 4.13 4.25 4.38 4.88 5.00 5.49 5.49 5.50 5.86 6.50 6.50 6.75 6.75 7.70 7.83 7.94 7.99 8.19 8.30 8.44 8.49 8.75 8.84 9.00 1.63 1.75 1.88 2.00 2.21 2.34 2.50 2.63 2.75 2.88 3.00 3.13 3.37 3.63 3.75 3.88 4.00 4.13 4.25 4.38 4.50 4.63 4.78 4.96 5.11 1.88 2.01 2.27 2.33 2.44 2.69 2.81 2.91 3.01 3.44 3.48 3.59 3.81 4.04 4.06 4.18 4.46 4.60 4.60 4.85 4.97 5.10 5.19 5.37 5.50 during Section S7 testing The GSSS shall undergo shock testing in accordance with MIL-S-901 and environmental vibration testing in accordance with MIL-STD-167-1 F Bolt Circle Bolt Size 1⁄2 in N/A N/A 3.25 3.34 3.60 3.77 3.88 3.91 4.16 4.41 4.53 4.60 4.88 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A F Bolt Circle Bolt Size 5⁄8 in N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.50 4.62 4.72 5.00 5.17 5.55 5.62 5.77 5.92 6.05 6.14 6.31 6.44 6.77 6.64 6.78 F Bolt Circle Bolt Size 3⁄4 in N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.27 6.43 N/A N/A 6.77 6.91 S5.9 Unless otherwise specified, the seal manufacturer shall prepare drawings in accordance with ANSI Standards Y14.1, Y14.2, Y14.3, Y14.5, Y14.6, and Y14.26.3 16 F1511 − 16 TABLE S5.6 Split Mechanical Seals A Shaft Diameter 1.250 1.375 1.500 1.625 1.750 1.875 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 4.125 4.250 4.375 4.500 4.625 4.750 B Box Bore 1.86 1.94 2.50 2.50 2.50 2.63 2.75 2.87 3.06 3.18 3.18 3.62 3.62 3.93 3.93 4.31 4.31 4.43 4.43 4.75 4.75 4.93 5.00 5.12 5.25 5.42 5.42 5.35 5.62 B Box Bore max 2.10 2.38 2.50 2.62 2.68 2.87 3.00 3.12 3.25 3.37 3.62 3.87 4.25 4.12 4.12 4.75 4.75 5.00 5.00 5.12 5.12 5.50 5.50 5.71 5.75 6.00 6.12 6.12 6.12 C Box Face 2.35 2.63 2.94 2.94 3.00 3.12 3.31 3.62 4.00 4.12 4.00 4.75 4.75 5.00 5.00 5.25 5.25 5.50 5.50 5.75 5.75 6.00 6.00 6.25 6.25 6.50 6.50 6.75 6.75 Maximum Dimensions for Seal Interface C1 D E Box Outboard Nearest Depth Space Obstruction Required N/A N/A 0.407 0.407 0.407 0.423 0.438 0.313 0.375 0.375 0.375 0.281 0.375 0.375 0.375 0.375 0.375 0.501 0.501 0.407 0.407 0.482 0.407 0.407 0.407 0.457 0.457 0.457 0.432 1.78 1.78 1.88 1.88 1.87 2.00 2.00 2.19 2.25 2.15 2.15 2.38 2.38 2.50 2.50 2.50 2.50 2.50 2.50 2.53 2.53 2.63 2.50 2.50 2.50 2.50 2.50 2.50 2.50 17 3.00 3.00 3.00 3.00 3.00 3.06 3.06 3.50 3.50 3.50 3.50 3.62 3.62 3.75 3.75 3.75 3.75 4.02 4.02 4.02 4.02 4.02 4.02 4.02 4.02 4.02 4.02 4.02 4.02 F Gland Diameter 4.91 5.01 5.28 5.28 5.28 5.50 5.63 6.13 6.50 6.50 6.50 7.76 7.76 8.01 8.01 8.26 8.50 8.51 8.51 9.00 9.00 9.02 9.02 9.27 9.27 9.55 9.55 9.77 9.77 G Bolt Circle Bolt Size 3⁄8 in 3.17 3.25 3.68 3.68 3.68 3.78 3.88 4.37 4.56 4.56 4.63 5.38 5.38 5.73 5.74 5.88 5.88 6.18 6.18 6.56 6.56 6.63 6.63 6.86 6.86 7.13 7.13 7.38 7.38 G Bolt Circle, G Bolt Circle, Bolt Size 1⁄2 in 3.29 3.38 3.81 3.81 3.81 3.91 4.00 4.50 4.68 4.68 4.68 5.50 5.50 5.86 5.87 5.86 5.87 6.31 6.31 6.68 6.68 6.75 6.75 7.00 7.00 7.25 7.25 7.50 7.50 Bolt Size 5⁄8 in 3.42 3.50 3.93 3.93 3.93 4.03 4.12 4.62 4.81 4.81 4.87 5.63 5.63 5.98 5.99 6.13 6.13 6.43 6.43 6.81 6.81 6.88 6.88 7.13 7.13 7.38 7.38 7.63 7.63 F1511 − 16 TABLE S5.7 Material Requirements and Service Limits for Standard SealsA Fluid Design Detail Metal components (TRIM)B Fuels and Lubricants Fresh Water 316 stainless steel NiCu Alloy 20 bronzeC SpringsD NiCu titanium Alloy 20 bronzeC NiCrMoCo NiCu NiCrFe NiMo NiCrMoCo NiMo (Alloy B) NiMo (Alloy C) NiCr NiCrMoCb 316 stainless steel 17–7PH NiCu NiCrFe NiMo NiCrMoCo NiMo (Alloy B) NiMo (Alloy C) NiCr NiCrMoCb fluorcarbonE,F elastomers Elastomer components carbon graphiteG Primary seal ring Mating ring Pressure rpm Max Temperature Seawater Tables S5.1 and S5.2 Tables S5.3 and S5.4 Tungsten carbideH (6 to 10 % nickel bound) Silicon carbide H Nodular or graphitic ductile Tungsten carbide (6 to 10 % nickel bound) Silicon carbide nickel cast iron Tungsten carbide (6 to 10 % nickel bond) Silicon carbide 150 psig max (1.03 MPa) 3600 rpm 1800 rpm 225°F (107°C) max 170°F (77°C) A See Tables S5.1-S5.4 for standard seal envelopes and Section for application material specification Drive set screws not applicable and shall be of harder material than the shaft C Older design seals in service, replacement parts, and assemblies only D Wave spring materials may be supplied to “chemistry only” limits of the material specification E See Table for elastomer compatibility F Ethylene propylene may be used where specified for special purposes G See Footnote for acceptable grades and approval requirements H See Table for performance limits of face material combinations B TABLE S5.8 Qualification Test Parameters Mechanical Seal Type Tables S5.1 and S5.2 Tables S5.3 and S5.4 Test Sequence Axial OffsetA ±0.003 in (0.08 mm) Radial Offset ±0.003 in (0.08 mm) Test Sequence Duration Run-in Performance tests 0 +(0.035 in (0.89 mm) + SNE)B 20 h 20 h 20 h 20 h 400 h 0 20 h 20 h 0 0 0 20 8h Run-in New seal test after run-in NEUTRAL +(0.030 + SNE)B –(0.030 + SNE)B Neutral 0.010 in (0.25 mm) LEFT Neutral 0.010 in (0.25mm) RIGHT Neutral 0 0 0 20 h 20 h 20 h 20 h 8h 20 min/zero leak 400 h A = neutral position B SNE = seal nose extension—Ref Fig S5.2 S5.9.1 Drawings shall be furnished under each contract or order unless the complete equipment covered by the drawings are identical in all respects to those previously submitted S5.9.2 Information intended for manufacturer’s use only shall be so designated S5.10 Drawings for each mechanical seal shall include a sectional assembly drawing and identify piece parts with sufficient detail S5.10.1 Sectional assembly drawings shall include a sectional assembly with references to a parts list identifying materials for all individual parts S5.10.1.1 All running clearances shall be shown and shall be dimensioned and labeled as diametral clearances S5.10.1.2 Tightening torques with tolerances and thread lubrication requirements for threaded fasteners shall be shown on the drawing 18 F1511 − 16 FIG S5.2 Dimensional Record S5.10.1.3 Assembly drawings shall show, as a minimum, the dimensions shown on the applicable Tables S5.1-S5.4 S5.10.1.4 Drawings shall specify the type, amount, and required use of lubricant S5.10.1.5 Drawings shall specify where there is an adhesive or other setting compound factory installed on the elastomer bellows or O-ring that seals between the mechanical seal and the impeller hub, shaft, or shaft sleeve S5.10.1.6 Drawings shall provide a description of any adhesive or setting compound identified in S5.10.1.5 including any time limits associated with the compound when present on a mechanical seal in storage and between initial wetting of that compound and the final positioning of the mechanical seal in the pump S5.10.2 When requesting qualification testing to satisfy Tables S5.1-S5.6, component drawings shall be submitted to NAVSEA for review and approval Drawings to include dimensional details, manufacturing tolerances, and material specifications Seal drawings to be used for NAVSEA verification only S5.10.3 Shock requirements are specified under Section S7.8, Shock Test S5.11 “J-seat” stationary ring designs shall be allowed for lube oil and fuel oil services S6 Materials S6.1 The mechanical seal metal parts shall be supplied in accordance with Table S5.7 S6.2 The primary seal ring shall be carbon-graphite,9 silicon carbide, or to 10 % nickel-bound tungsten carbide The mating ring face shall be to 10 % nickel-bound tungsten carbide or silicon carbide and suitable for the liquid being pumped Cobalt-bound tungsten carbide shall not be used Nodular or graphitic ductile nickel cast iron,10 may be supplied for lubricants and fuel oil service S6.3 Elastomers such as bellows, O-rings, friction rings, and so forth, furnished with seals supplied to the requirements of this Supplement S1 shall be made of fluorocarbon elastomer in accordance with SAE Standards AMS 7259, AMS 7276, Carbon graphite material shall be a manufacturer’s grade that has been tested and qualified for mechanical seal face service under the qualification tests required by this specification and has been documented as being in regular shipboard service under equivalent operating conditions S6 Split Seals shall use carbon graphite grades CTI–6 or P8412 Alternative carbon graphite materials will be conditionally approved by NAVSEA for specific mechanical seal service Approval for general service will be granted after seal qualification testing under this specification and after evidence of satisfactory shipboard service under equivalent operating conditions, is provided 10 Ni-Resist (term and logo copyright Dura-Bar, 2100 West Lake Shore Drive Woodstock, IL 60098) or equivalent has been found satisfactory for this purpose 19 F1511 − 16 S7.2.2.3 The 500 h endurance test for Type E seals shall be accomplished by performing 125 h of testing at each of the following conditions: AMS 3216, and AMS 3218, or Practice D1418 Class FKM, unless otherwise specified in the contract Refer to Table for general service applications and for alternative elastomers suitable for special requirements S6.4 On seawater pumps, the mechanical seal O-rings and other elastomers shall not be mounted on or come in contact with the impeller S6.5 All mechanical seals under this specification shall be certified to be free of functional mercury 800 300 800 300 fpm, fpm, fpm, fpm, 65 psig fluid pressure, 80 65 psig fluid pressure, 80 psig fuild pressure, 125 psig fluid pressure, 125 psig psig psig psig barrier barrier barrier barrier pressure pressure pressure pressure (1) A total minimum of 25 starts and stops must be performed during the endurance testing Each start cycle must include a minimum of of operating time A minimum of three 8-h rest periods must be taken during the endurance test (2) During endurance testing, there shall be no visible fluid leakage Maximum barrier consumption rate shall be 1.90 nl/min or 4.0 scfh S7 Testing of Mechanical Seals S7.1 The purpose of these test procedures is to develop a high confidence level that a Class mechanical seal has a projected statistical life of 16 000 h under normal field service conditions S7.2 To qualify a mechanical seal design, NAVSEA11 will first conduct a technical evaluation, reviewing the manufacturer’s design for compliance with this specification, configuration, material and performance requirements Subsequent to technical evaluation, the seal will undergo a performance evaluation, including: S7.2.2.4 Type E seals shall undergo a seal recovery test Test shall be performed in the following order: (1) 15 at 300 fpm, 65 psig fluid pressure, 125 psig barrier pressure (2) 15 at 300 fpm, 65 psig fluid pressure, disconnect air source, vent to atmosphere (3) 15 at 800 fpm, 100 psig fluid pressure, 125 psig barrier pressure (4) 15 at 800 fpm, 100 psig fluid pressure, disconnect air source, vent to atmosphere (5) 15 at 300 fpm, 65 psig fluid pressure, 125 psig barrier pressure Test Run-in—8 h Hydrostatic—5 Operational—500 h Shock—Mil-S-901 (Grade A) Parameters Monitored/Measured Operating pressure Operating temperature Surface speed (ft/min) Fluid media Leakage rate Wear rate At the end of the recovery test there shall be no visible fluid leakage Maximum barrier consumption rate shall be 1.90 nl/min or 4.0 scfh S7.2.3 Any changes to a qualified mechanical seal shall be presented to the government buying activity for technical evaluation S7.3 General Comments: S7.3.1 Data will be collected and entered on data sheets similar to those in Fig S5.2 and Fig S7.1 S7.3.2 Any problems encountered with the seals, installation, operation of the test fixture, or breakdowns of any kind, shall be recorded This record shall include a statement of the problem, cause, running time meter reading at occurrence, and any other pertinent information S7.3.3 All tests shall be performed in sea water using the same seal S7.3.4 The test conditions shall be: S7.2.1 Testing, including qualification testing, of Classes through split mechanical seals shall be application specific, conducted under test conditions, which include the proposed operating conditions, and under a test schedule and performance requirements that have been agreed upon by the purchaser (buyer) and the manufacturer S7.2.2 Type E seals shall be tested with 0.035 in of axial endplay towards the driver end of the pump S7.2.2.1 Test to be accomplished using a fluid with a viscosity of 100–500 SSU at start-up Air shall be used as the barrier fluid S7.2.2.2 Run-In Test: (1) Run-in test specified below in accordance with S7.2.2.2, S7.2.2.3, and S7.2.2.4 is based on a 1.750-in shaft size for lube and fuel oil pumps Type E seals greater than 1.750 in shaft size shall have an air consumption rate less than or equal to 0.2 % of rated pump capacity (2) Run-in test shall be accomplished for h at a speed of 800 fpm with a fluid pressure of psig and a barrier pressure of 125 psig Zero fluid leakage is required during this test Air consumption rate shall be less than or equal to 1.90 nl/min or 4.0 scfh (3) Seal shall be operated for 20 with conditions as above except the speed shall be 300 fpm Fluid leakage and air consumption shall meet requirements of S7.2.2.2 Speed: 3600 rpm ± % Tables S5.1 and S5.2 1800 rpm ±5 % Tables S5.3 and S5.4 Temperature: 170°F (77°C), monitored at seal cavity The flowrate shall be varied as necessary to maintain the seal cavity at the specified temperature Pressure: 150 psig (1.03 MPa) ± psi (0.03 MPa) Fluid media: ocean water in accordance with Specification D1141 S7.3.5 Any seal shown in Tables S5.1 and S5.2 successfully passing all tests will qualify any smaller seal of the same design up to but not including in (25.4 mm) smaller.12 S7.3.6 Test Facility—The test facility must be approved by NAVSEA before conducting the tests Approval criteria will be based on information submitted by the facility demonstrating the capability to perform all tests indicated herein 12 Example: Successfully qualifying a 2.000-in (50.8-mm) diameter seal would likewise qualify all seal sizes from 2.000 to 1.125 in (50.8 to 28.5 mm) 11 Department of the Navy, Naval Sea Systems Command, NAVSEA, Arlington, VA 22242–5160 20