NAVISTAR MPAPS K-15-5009-2015 Polytetrafluoroethylene (PTFE) Seal Material.pdf

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1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. OCTOBER 2015 Page 1 of 9 NAVISTAR, INC. Material, Parts, and Process Specificatio

2、ns (MPAPS) NUMBER: MPAPS K-15-5009 Former Designation EMS D15-5009 TITLE: Polytetrafluoroethylene (PTFE) Seal Material CURRENT REV No.: 1510 DATE: Oct. 2015 WRITTEN/EDITED BY: G. Svidron APPROVED BY: R. Goluch SUPERSEDES: Rev. G- Dec. 2003 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT

3、 REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of r

4、egulatory limits prior to use. Change Notice: Convert to MPAPS system and miscellaneous editorial changes. 1.0 APPLICATION This specification covers materials intended for use with diesel engine lubricating oil, fuel and air. 2.0 SCOPE This specification covers requirements for a polytetrafluoroethy

5、lene (PTFE) blended compound. This material can operate between -93 C to 260 C (-200 F to +500 F). 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the CEMS B-50 specification. 3.0 REFERE

6、NCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following Specifications, Standards, and Regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 NAVISTAR Manufacturing Std. MS-D-13

7、NAVISTAR Engineering Design Std A-16 NAVISTAR CEMS B-50 NUMBER: K-15-5009 TITLE: Polytetrafluoroethylene (PTFE) Seal Material REVISION: 1510 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are requi

8、red to assume all patent liability. 2015 by Navistar, Inc. OCTOBER 2015 Page 2 of 9 4.0 MATERIAL REQUIREMENTS (ASTM Standards, latest issue) 4.1 Type I - Main Seal Element: Glass Fiber with Molybdenum disulfide Reinforced PTFE Tensile Strength, Mpa (psi) Min. 17.9 (2,600) ASTM D1457 Elongation, % Mi

9、n. 200.0 ASTM D1457 Specific Gravity 2.16 - 2.28 ASTM D792 Glass Fiber, % 3.0 - 7.0 Method A 2 MoS2, % 3.0 - 7.0 Method A 2 Color Black 4.2 Type II - Excluder Element: Glass Fiber with Pigmentation Reinforced PTFE Tensile Strength, Mpa (psi) Min. 13.8 (2,000) ASTM D1457 Elongation, % Min. 160.0 ASTM

10、 D1457 Specific Gravity 2.14 - 2.26 ASTM D792 Glass Fiber + Pigmentation, % 10.0 - 20.0 Method B 2 Color Yellow 4.3 Type III - Excluder Element: Ryton and Carbon Graphite Reinforced PTFE Tensile Strength, Mpa (psi), Min. 15.8 (2,300) ASTM D1414 3 Elongation, % Min. 150 ASTM D1414 Specific Gravity 2.

11、02 - 2.10 ASTM D792 %, Filler 7.13 Method B(2) Color Black 4.4 Type IV Seal, Radial: Tensile Strength, Mpa (psi) min. 17.2 (2500) ASTM D4894 Elongation, % min. 200 ASTM D4849 Specific Gravity 2.14 - 2.26 ASTM D792 Glass Fiber & Pigmentation, % 12 20 Green NUMBER: K-15-5009 TITLE: Polytetrafluoroethy

12、lene (PTFE) Seal Material REVISION: 1510 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. OCTOBER 2015 Page 3 of 9 4.5 Type V Seal,

13、 Radial: Tensile Strength, Mpa (psi) min. 17.2 (2500) ASTM D4894 Elongation, % min. 200 ASTM D4849 Specific Gravity 2.14 - 2.26 ASTM D792 Glass Fiber & Pigmentation 22 - 30 Color Blue 4.6 Type VI - Excluder Element: (Main Seal Element/Special applications) Tensile Strength, Mpa (psi) min. 15.2 (2200

14、) ASTM D1457(1) Elongation, % min. 200 ASTM D1457 Specific Gravity 2.12 - 2.22 ASTM D792 Glass Fiber, % 5.0 - 15.0 Method A(2) Graphite, % 0.0 10.0 Method A(2) Color Black (1)See 4.0 METHOD OF TEST - Modified Tensile Specimen. (2)See 4.0 METHOD OF TEST (3)Test speed to be 50mm/minute. 5.0 METHOD OF

15、TEST All tests shall be performed to latest test designation, procedure and/or method as set forth by this specification. .20 .20 .20 .100 .001 .245 .001 Specimen thk. to be same as element Tolerance - .003 except where noted. Scale 3:1 Dimensions in inches MODIFIED TENSILE SPECIMEN: NUMBER: K-15-50

16、09 TITLE: Polytetrafluoroethylene (PTFE) Seal Material REVISION: 1510 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. OCTOBER 2015

17、 Page 4 of 9 5.1 Method A: 5.1.1 Background: Determination of PTFE content in mixtures with glass, graphite, and/or molybdenum disulfide can be done with TGA if certain conditions are met. A. Hydrogen Fluoride formed during the decomposition of PTFE may react with glass to form volatile SiF4 simulta

18、neously, causing uncertainty of PTFE content. B. Both graphite and molybdenum disulfide will form volatile compounds in air at temperatures in excess of 900 C. 5.1.2 Method of Determination: PTFE in mixtures with graphite, glass and molybdenum disulfide can be successfully determined by TGA under ni

19、trogen at 200 ml/min, using a platinum sample pan. Graphite and molybdenum disulfide may then be determined in air, either by TGA or in a muffle oven. This is the total weight loss in air. The final residue (ash) is the glass content. NOTE: Using platinum crucible under simultaneous purge with nitro

20、gen is essential in the determination of PTFE in the presence of glass. 5.1.3 Procedure: 5.1.3.1 Weigh platinum crucible to be used. 5.1.3.2 Place a minimum of 100 milligrams of material to be checked into the crucible, and record total weight of crucible and material. 5.1.3.3 Place the crucible int

21、o the TGA or an oven at room temperature. Heat TGA or oven up to 800 C, and allow TGA or oven to stabilize for a minimum of 1 hour. 5.1.3.4 Allow the crucible to cool down to room temperature. 5.1.3.5 Weigh crucible and residue, and record weight. Subtract this from the earlier recorded weight from

22、step 2, and this is the weight of the glass and molybdenum disulfide. 5.1.3.6 To determine the weight of the glass, put remaining residue in the muffle oven, and bring oven up to 800 C. At this temperature, begin to purge with air (Note: This is done by opening the muffle oven door by approx. 1”). B

23、ring the oven up to 900 C, and allow the oven to stabilize for a minimum of 1 hour. NUMBER: K-15-5009 TITLE: Polytetrafluoroethylene (PTFE) Seal Material REVISION: 1510 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical St

24、andards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. OCTOBER 2015 Page 5 of 9 5.1.3 Procedure: (Contd) 5.1.3.7 Remove crucible and allow it to cool to room temperature. Weigh the crucible. Subtract this from the earlier recorded weight of the crucible. The remaining

25、 residue (ash) is the glass content. 5.1.3.8 To determine the molybdenum disulfide content, subtract the weight from step 7 from the weight in step 5. The difference in weight is the molybdenum disulfide. 5.2 Method B: 5.2.1 Background: Determination of PTFE content in mixtures with glass can be don

26、e with TGA if certain conditions are met. A. Hydrogen Fluoride formed during the decomposition of PTFE may react with glass to form volatile SiF4 simultaneously, causing uncertainty of PTFE content. 5.2.2 Method of Determination: PTFE in mixtures with glass can be successfully determined by TGA unde

27、r nitrogen at 200 ml/min, using a platinum sample pan. NOTE: Using platinum crucible under simultaneous purge with nitrogen is essential in the determination of PTFE in the presence of glass. 5.2.3 Procedure: 5.2.3.1 Weigh platinum crucible to be used. 5.2.3.2 Place 7-10 grams of the material to be

28、checked into the crucible, and record total weight of crucible and material. 5.2.3.3 Place the crucible into TGA or an oven at room temperature. Heat TGA or oven up to 800 C, and allow TGA or oven to stabilize for a minimum of 1 hour. 5.2.3.4 Remove the crucible from the oven. 5.2.3.5 Allow the cruc

29、ible to cool down to room temperature. 5.2.3.6 Weigh crucible and residue, and record weight. Subtract this from the earlier recorded weight from step 2, and this is the weight of the glass. The remaining residue (ash) is the glass content. NUMBER: K-15-5009 TITLE: Polytetrafluoroethylene (PTFE) Sea

30、l Material REVISION: 1510 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. OCTOBER 2015 Page 6 of 9 6.0 MEASUREMENT OF FILLER CONTE

31、NT OF COMPOUNDS USING THERMOGRAVIMETRIC ANALYSIS (TGA) 6.1 Purpose: To provide a method of measurement of filler contents of rubber and PTFE compounds using Thermogravimetric Analysis (TGA). 6.2 Revision: All changes must be approved by Materials Engineering. 6.3 References: 6.3.1 Perkin-Elmer TGS-2

32、 Thermogravimetric System 6.3.2 Perkin-Elmer TGS-2/Thermal Analysis Data Station (TADS) System 6.4 Equipment Required: 6.4.1 A Perkin-Elmer TGA unit. It could be a part of a complete thermogravimetric analysis system. It should have the temperature controller, balance controller and associated compu

33、ter hardware and software. 6.4.2 A sensitive analytical balance, preferably, with a resolution of 0.0001 grams. 6.4.3 A Scalpel, or pair of scissors. 6.4.4 Platinum sample pan. 6.4.5 Nitrogen and compressed air cylinders. 6.4.6 Tweezers 6.4.7 Bunsen burner. NOTE: Read the instruction manuals of the

34、instrument before starting any test. Note the required frequency of calibration of the thermal and balance units and perform the calibration according to the manual 6.5 Procedure NUMBER: K-15-5009 TITLE: Polytetrafluoroethylene (PTFE) Seal Material REVISION: 1510 This document is restricted and may

35、not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. OCTOBER 2015 Page 7 of 9 6.5.1 Hold the platinum pan over a Bunsen burner flame using a pair of tweezers. Let it turn

36、red hot. This will clean any residual deposits on the platinum pan from any previous test. Sometimes, it may be hard to get all the deposits out this way. In that case, dip the pan in concentrated hydrochloric solution for a few minutes and subsequently rinse it in distilled water. Thereafter, the p

37、an can be burnt over the flame. 6.5.2 Select a clean area of the supplied sample. Using the scissors or a scalpel cut about 15 to 20 milligrams of the sample and place in the platinum pan. 6.5.3 Hook the purge gas connector to the nitrogen cylinder. 6.5.4 Turn the TGA unit “on”, including the temper

38、ature and balance controllers. Refer to the instruction manuals for details. 6.5.5 Set the minimum temperature, maximum temperature, heating rate and load temperature according to the procedure in the manual. Unless otherwise specified by the materials engineer, the minimum and maximum temperatures

39、for the nitrogen run should be set to 40-80 C, respectively, whereas, the same for the air should be set to 40-950 C. 6.5.6 Turn the computer “on” and load the TGS TADS software. Follow the detailed instructions in the manual, zero the balance and subsequently set all the required parameter. 6.5.7 H

40、ang the sample pan from the balance hook and close the chamber tightly. Open the purge gas valve and wait a minute to get a good purge. 6.5.8 Start the test. After it is finished, save the data, plot and report the parameters listed below. 6.5.9 Unhook the purge gas connector from the nitrogen tank

41、and connect it to the air tank. 6.5.10 Start the test again to complete the air run. 7.0 REPORT Produce separate charts for both runs. Identify the temperatures where the line starts to shift downwards. A line could shift at more than one place in a chart (i.e., the weight loss can occur in steps).

42、Note all these step weight losses. Using the software, measure the weight loss in each step. Record the start and end temperatures of each step weight loss and the amount (in percent of weight loss). 8.0 QUALITY NUMBER: K-15-5009 TITLE: Polytetrafluoroethylene (PTFE) Seal Material REVISION: 1510 Thi

43、s document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. OCTOBER 2015 Page 8 of 9 The material and workmanship shall be in accordance with goo

44、d commercial practice. Seals shall be suitable for the use intended and shall be free of those discontinuities specified on the seal drawing which are detrimental to its intended use. 9.0 SOURCE APPROVALS AND QUALITY CONTROL 9.1 Supplier Requirements Suppliers must conform to the requirements of the

45、 International IQR Quality Standard which includes conformance to the QS-9000 (ISO 9001) Quality System Standard. NAVISTAR will also accept TS-16949 registration as long as the supplier can also fulfill all AIAG PPAP (Production Part Approval Process) documentation and approval requirements. Supplie

46、rs must maintain their certification with an accredited registrar and must furnish copies of registration certificates to their Corporate Buyer upon request. 9.2 Approval Production material can only be furnished under this specification after successful completion of engine tests conducted at Engin

47、e Engineering or other approved test site. Parts supplied against contracts or purchase orders citing this specification shall be equivalent in all respects to those samples, which were approved by the purchaser. No changes in formulation or processing practices are permitted without approval. In th

48、e event that changes in material, properties, processing practices, construction, color, or labeling of the product are required, the supplier shall notify Materials Engineering at Engine Group Engineering and Corporate Purchasing and Supplier Development of the proposed change(s). Test data indicat

49、ing conformance to all requirements of this specification, test samples, and new or amended or updated Material Safety Data Sheet(s) (MSDS), in accordance with CFR Title 29, Part 1910 shall be submitted with the request for change. 9.3 Process Control The supplier shall either perform and report results of tests on specific lots of parts produced or provide statistical ev