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  • Users: g1a1
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  1. g1a1

    Trunnion Valve Bearings

    Can anyone assist me in locating a bearing supplier of PTFE mecahnically bonded to perforated stainless steel. We currently use EPI hyload-77 bearings, but these will become unavailable shortly. Need bearings with same or better performance in Valves.
  2. g1a1

    Creep Coefficients for Teflon (for FEA Analysis)

    Thanks Plastx...Great Stuff!
  3. g1a1

    Creep Coefficients for Teflon (for FEA Analysis)

    Thanks Demon3 for all your help!
  4. g1a1

    Creep Coefficients for Teflon (for FEA Analysis)

    I'm trying to perform a FEA analysis on Teflon as a valve seal. Can someone provide general creep coefficients for either Ansys or Cosmos?
  5. g1a1

    3D CAD Packages

    I would like to thank you all for sharing your recommendations and insight with the numerous CAD programs available. It has been a extremely helpful.
  6. g1a1

    3D CAD Packages

    My Company has been using Autodesk for a number of years. A handful of us are using Mechanical Desktop 2005 and the rest use ACAD 2D 2005. Since MDT is fading away, we are undecided whether or/not to pursue training in Inventor or some other 3D Package (at a lower cost/seat). We have a large...
  7. g1a1

    PE Practice Problems by Michael Lindeburg

    philrock, thanks for your help
  8. g1a1

    PE Practice Problems by Michael Lindeburg

    The book was purchased with the chapters missing. Is the publisher or anyone away of this?
  9. g1a1

    PE Practice Problems by Michael Lindeburg

    I'm missing chapters 55, 56 and 57 in the PE Practice Problems by Michael Lindeburg. Is there a site to download these missing chapters?
  10. g1a1

    Ansys WorkBench Error Message

    Drej, Ansys tech. solved my problem. I had to install workbench service pack 11 for running in WinXP OS. Thanks for all your assistance!!
  11. g1a1

    Ansys WorkBench Error Message

    Drej: I apologize for the small amount of info. What would information would help you? Does the ansys solver module have to be toggled "on"?
  12. g1a1

    Ansys WorkBench Error Message

    All loads, materials and BC have been applied. Its a static structural nonlinear ductile analysis.
  13. g1a1

    Ansys WorkBench Error Message

    I receive the following during solution, "An error occured while starting the Ansys solver module". Does anybody know how to resolve this issue? Thanks
  14. g1a1

    Element choice for Grafoil Material

    What ansys element would accurately model 70#/ft^3 grafoil seal material? Thanks
  15. g1a1

    Pneumatic Solenoid Valves

    Thanks for your assistance
  16. g1a1

    Pneumatic Solenoid Valves

    Closing time for the solenoid only was not recorded, just the overall time when the solenoid was energized. We eliminated the issue by using a quick exhaust. That was using a brass Asco Solenoid Valve. Our customer has changed requirements to a S/S which is not offered in the same design as the...
  17. g1a1

    Pneumatic Solenoid Valves

    A test was performed on the Valve/Actuator assembly only and closing time was under 2 secs. This confirmed that (1) no moisture was enter the system and (2) the Valve/Actuator was capable of cycling shut in the required time.
  18. g1a1

    PTFE Seat Ball valve problems

    Daveb9, Sounds like the seat ID is smaller than the Ball ID. During closing the ball catches the seat lip and plastically deforms it. I have experience with liguid nitrogen seat designs and have seen seats react in this manner due to shrinkage at low temps (-320F). Excessive assembly forces can...
  19. g1a1

    Pneumatic Solenoid Valves

    Closing time includes the solenoid combined with ball valve mounted with actuator.
  20. g1a1

    Solenoid Valves

    Thanks ilan. I think the quick exhaust may solve my problem.

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