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  1. LittleInch

    Kinematics - force analysis

    Assuming no friction in the sliding components?
  2. LittleInch

    Use of Gate Valve for Throttling

    I doubt you would get actual valve body failure but not impossible if you get a lot of vibration. Difficult to speculate without more details. Isolation valves ( ball, gate etc) get used all the time as throttle valves when they shouldn't and survive. For me the risks of body failure are very...
  3. LittleInch

    Slideruleera.net Successor

    Try this link https://www.eng-tips.com/threads/slide-rule-era.501369/page-5#
  4. LittleInch

    Slideruleera.net Successor

    See the discussion on the whole of page 5. KootK seemed interested.....
  5. LittleInch

    Slideruleera.net Successor

    Have you seen this? https://www.eng-tips.com/forums/507/faqs/2923 Or this? https://www.eng-tips.com/threads/slide-rule-era.501369/page-5#post-8967455
  6. LittleInch

    Dry Co2 95% sizing Orifice meter

    Why? Just write a data sheet and let the vendor determine this.
  7. LittleInch

    Fan blade worn out

    Maybe its irrelevant, but which way does this thing operate? Flow from the inside to out or outside to in. i.e. the direction of rotation as shown in the video or the other way around. Does this thing operate with the disc on the left actually horizontal? The outer parts look to be very wavy...
  8. LittleInch

    Fan blade worn out

    Given what looks like considerable thinning of the blades, I suspect you simply need a new one. Next time try coating it in rubber.
  9. LittleInch

    Use of Gate Valve for Throttling

    You don't say what pressure drop or flow you're expecting or why this needs to be done? Issues - low control of flow. Small movements of the gate results in much bigger changes in DP / flow Depending on the design of the valve ( cross section would help as "Gate valve" can mean many different...
  10. LittleInch

    Heathrow power outage

    So the basic summary seems to be: Water detected 7 years ago, but the replacement of the bushes was not undertaken and maintenance postponed. No one seems to know why... The site was built prior to better segregation and fire walls, yet remained in service and no apparent attempt made to upgrade...
  11. LittleInch

    Dew point for RNG

    It's definitely that 4000 psi that makes the difference, both in the resulting free water and also the low temperatures and water drop out when you release it into the pipeline. You have a decent system there to lower your dewpoint. If this system is running can you not calibrate / compare the...
  12. LittleInch

    Can Service Pressure Exceed Design Pressure?

    In terms of the OP, my guess is that all it is saying is that use or certification of components with a higher design pressure than the main vessel can be undertaken in a report. So if I read this correctly, using say a flange designed for 275 psi in a vessel designed for 150 psi is perfectly...
  13. LittleInch

    Heathrow power outage

    Final report issued. https://www.neso.energy/news/final-report-review-north-hyde-substation-outage Scroll down to find the actual report. Failure of a bushing due to water ingres. Also Heathrow takes 10 to 12 hrs to reconfigure their internal systems. Apparently this was "not well known"....
  14. LittleInch

    Dew point for RNG

    If they know 1lb /mmscf is a good number then fair enough. Composition does impact the dew point so be a bit careful about charts etc based on virtually pure methane. 0F at Standard conditions is quite reasonable. What can your current dehydration do? Thanks for the info on the trailer...
  15. LittleInch

    Dew point for RNG

    What pressures are those dew point temps? Composition has a big impact and the is no easy way other than direct testing to get you a number, especially at 275 bar. Have you used something like HYSIS or an EOS? I'm assuming you don't want free water in your CNG truck transport, so you might...
  16. LittleInch

    Air India 787 crashes on take off

    There's increasing noise about an initial report being issued end this week / early next, but don't expect much other than the simple facts (4/5 pages) seems to be the news. They still seem to be going for 3 months before issuing anything of depth.
  17. LittleInch

    Bowstring Steel Pedestrian Bridge Connection Details (Top and Bottom Transverse Members and Diagonals)

    I think these look really ugly and will be an absolute bitch to install unless the ends are cut super accurately and square and the bolts drill within 1mm of where they are supposed to be. Have you thought about internal box sections which extend say two or three times the lengths of your...
  18. LittleInch

    Fan blade worn out

    Nothing here makes sense to me. Three identical pictures of what seems to be an impellor, but it has a solid inner core? EDIT - I now see once I click on the photo that we're actually looking at two blades of the impellor... difficult to see the trailing edge of the top one. Also doesn't look...
  19. LittleInch

    Connection Between Tanks

    Odd question with no details.... Errr to flow liquid or vapour between the tanks? If liquid then a low as possible, if vapour then a high as possible. Far too many variables here to give any other opinion.
  20. LittleInch

    U-bend before pump suction inlet.

    Two options as most people say, either the inlet gets clogged and the wanted an easier way to disconnect and flush out the gunk or someone thought it could be semi self priming. Ask the operators....

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