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  • Users: kcj
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  1. kcj

    Sealing NPT threads, tape v. anaerobics ?

    I also posted in the piping thread, but specific application is hydraulics. The perennial discussion of teflon tape vs. anaerobic sealants for NPT threads goes on forever on boards. My opinion, your opinion, etc. Is anyone aware of actual test research between the various methods? Teflon...
  2. kcj

    sealing NPT threads, is there research tape vs. sealer?

    The perennial discussion of teflon tape vs. anaerobic sealants for NPT threads goes on forever on boards. My opinion, your opinion, etc. Is anyone aware of actual test research between the various methods? Teflon tape, Loctite PST, Megaloc, Rectorseal, etc? kevin j
  3. kcj

    Float switch with 'push to test'

    I have a requirement for a hydraulic tank level (float) switch that can be tested daily for operation. Customer wants to be able to ‘push to test’ the level switch circuit at the tank, to mechanically check the operation daily. We mainly use small optical level sensors, which have proven...
  4. kcj

    Aluminum manifolds clamped with steel tie rods

    I am looking for design or experience info on clamping a stack of aluminum manifolds with steel tie rods. Long past, I had an application with about 3 or 4 D03 sandwich blocks, aluminum totalling about 5 inches thick, clamped under a D03 valve with steel #10 Sun stud kits. Due to differences in...
  5. kcj

    Pressure control in hydrostatic propel circuit

    This is similar to my other post about force control circuit. I think the fundamental control concepts are the same in both cases, and I am equally baffled in each case. My drawback is that I am not a controls person, and don’t understand how plc approximates the old ancient analog closed loop...
  6. kcj

    Force control circuit

    Several years ago there was an article in Machine Design about 'Cobra Technology' valve in concept/development. I can’t find anything currently on the web. The concept was 4 (I think) PWM valves in a wheatstone bridge arrangement. There was a small damping volume on each port outlet to reduce...
  7. kcj

    B31 piping class-recommendations??

    this is cross posted in the piping also, but help! I am looking for a good 3 to 5 day class on intro to B31 code. Specifically, my lapplication is to pipe under 6 inch being used for hydrostatic (oil hydraulic) piping. I don't have to meet B31, but use it as general practice. Stresses...
  8. kcj

    B31 piping code class-recommendations?

    I am looking for a good 3 to 5 day class on intro to B31 code. Specifically, my lapplication is to pipe under 6 inch being used for hydrostatic (oil hydraulic) piping. I don't have to meet B31, but use it as general practice. Stresses, materials, welding, cleaning, etc. Any recommendations for...
  9. kcj

    Compressibility and air release of brake fluids

    I am looking for data on compressibility and air release characteristics of DOT 4 or similar glycols vs. DOT 5 silicone fluids. Application: very small system, maybe 2 or 3 cubic inches, where heat and boiling points are not important at all. However, stiffness and the ability to easy bleed it...

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