Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by kcj

  1. kcj

    BSPP Fitting Questions

    NPT and BSPT are slightly different. 55 vs 60 degrees, rounded or flat or truncated tops, and very slight pitch differences. I do remember smaller ones at 11 TPI vs. 11-1/2 TPI for example. They will screw into mismatched ports though.
  2. kcj

    BSPP Fitting Questions

    Also Parker Eaton Aeroquip Thread identification booklet is good. http://www.eaton.com/ecm/groups/public/@pub/@eaton/@hyd/documents/content/pct_472120.pdf BSPT is like NPT. tighten to anywhere, but use sealant to fight leaks. BSPP I have limited experience, but the elbows I have used had jam...
  3. kcj

    Variable Volume Reservoirs

    I would also like to hear from someone who has actually used one. Have followed the magazine articles introducing it. It has real appeal to me if it actually works. I think some of the negatives expressed above are carryover from the 'old rules of thumb' where a large reservoir did many...
  4. kcj

    Water Glycol (HFC) and Reservoir Coatings?

    Oops, posted to save the file then found out I can't edit to fix typos or continue. I have little expereience with paint or epoxy coatings inside tanks. I know several products are recommended, but defer to others experience. My only personal experience was as a machine mechanic in a pickle...
  5. kcj

    Water Glycol (HFC) and Reservoir Coatings?

    We have used Union Carbide/Citgo 5046 Water glycol for ovr 20 years. We have used sealed pressure/vac tanks with external KleenVent bladders to preven tloss of water in high heat conditions, and keep dust out. In our applications, the sealed tank is essential to making the fluid work well...
  6. kcj

    Variable Stroke Pneumatic Cylinder

    What is variable about the cylinder? Do you want position control, or just the ability to remotely adjust a stop point occasionally, say changing product setup or something? Are there ways to mechanically adjust a stop point with screw actuator, then use a regular bang bang air cylinder against...
  7. kcj

    Why does the reccomended maximum fluid flow velocity in pipes vary with pressure?

    Also, pressure drop is a function of velocity, but the pressure drop and energy losses for a given velocity don't affect all circuits in the same way. Pressure drop compared to total available pressure is a higher precentage of the original pressure. 5 psi drop in a suction line would be...
  8. kcj

    Setting up Hot oil purge valve in Hydro static drive

    Thenathu: Are the pump and motor far apart? You can reference the same line with both the pump case drain and the motor case drain if possible. This removes some of the variations. Or, if it is not possible to actually connect both drains to the same line, then use a flushing relief valve with...
  9. kcj

    Setting up Hot oil purge valve in Hydro static drive

    Any one know whats up with (Sergei?) Insane Hydr has been down since Nov of 2012, and no email responses. Great site. Not so much on theory but real world mechanical experience and explaining controls. k
  10. kcj

    Quick practical question about parrelel connected hydro motors

    Yes commonly done. The motors must be linked mechanically on one shaft, or the lightest loaded motor will over speed its load while the heavily loaded motor stalls. Putting two motors on one belt conveyor shaft, one each end, is common. Two motors may be more total space, weight and dollars...
  11. kcj

    Negative pressure at axial piston pump inlet

    Trying to say that the lower absolute pressure rating for hst compared to open loop pump is not now a rating for the variable pump portion (variable piston, on and off stroke) but at the inlet of a constant flow fixed gerotor or gear pump. Without the acceleration and deceleration of fluid, the...
  12. kcj

    Negative pressure at axial piston pump inlet

    Is the lower allowable absolute pressure for the closed loop pump specified at the inlet to the piston sections, or more likely inlet to charge pump? Charge pumps are usually gear or gerotor steady flow and steady acceleration of fluid. Piston open loop sections has the 'gulp factor' of...
  13. kcj

    Is there a aftermarket device for releaving clutch handle strain on harley-davidson

    I know nothing at all about HD but have worked cable clutch mc a long time. Is it glitchy and uneven, or just hard to hold after it has disengaged? If former, then cable housing friction or worn slight dips in the clutch basket, or sharp or uneven tab edges on the plates. Al;l of these cause...
  14. kcj

    Need to Identify What a Part Is In a Pumping System?

    Is it a torque measuring device that was used for purposes as a bearing? kcj
  15. kcj

    Ramping up an actuator on a load sensing system

    Making the long LS line(s) a LOT smaller in diameter. And try a stiffer construction multi wire or microbore gauge line maybe. Cold viscosity may be an issue, but try some things as tests. Both goals are to take out capacitance and lag in the feedback. An accumulator in the LS line would add...
See more

Part and Inventory Search

Back
Top