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  2. Concentric reducer - Wikipedia

    en.wikipedia.org/wiki/Concentric_reducer

    A concentric reducer is used to join pipe sections or tube sections on the same axis. [1] The concentric reducer is cone -shaped, and is used when there is a shift in diameter between pipes. [ 1 ] For example, when a 1" pipe transitions into a 3/4" pipe and the top or bottom of the pipe doesn't need to remain level. [ 2 ]

  3. Eccentric reducer - Wikipedia

    en.wikipedia.org/wiki/Eccentric_reducer

    Eccentric reducers are used at the suction side of pumps to ensure air does not accumulate in the pipe. The gradual accumulation of air in a concentric reducer could result in a large bubble that could eventually cause the pump to stall or cause cavitation when drawn into the pump. Eccentric reducers exhibit a unique design with one side having ...

  4. Shewhart individuals control chart - Wikipedia

    en.wikipedia.org/wiki/Shewhart_individuals...

    The normal distribution is NOT assumed nor required in the calculation of control limits. Thus making the IndX/mR chart a very robust tool. Thus making the IndX/mR chart a very robust tool. This is demonstrated by Wheeler using real-world data [ 4 ] , [ 5 ] and for a number of highly non-normal probability distributions.

  5. Cycloidal drive - Wikipedia

    en.wikipedia.org/wiki/Cycloidal_drive

    A cycloidal drive or cycloidal speed reducer is a mechanism for reducing the speed of an input shaft by a certain ratio. Cycloidal speed reducers are capable of relatively high ratios in compact sizes with very low backlash. [1] The input shaft drives an eccentric bearing that in turn drives the cycloidal disc in an eccentric, cycloidal motion ...

  6. Construction estimating software - Wikipedia

    en.wikipedia.org/wiki/Construction_estimating...

    Estimating worksheets – these are the spreadsheets where the real work takes place, supported by calculations and other features [6] Other typical features include: Item or Activity List: All estimating software applications will include a main project window that outlines the various items or activities that will be required to complete the ...

  7. Engineering tolerance - Wikipedia

    en.wikipedia.org/wiki/Engineering_tolerance

    Summary of basic size, fundamental deviation and IT grades compared to minimum and maximum sizes of the shaft and hole. Dimensional tolerance is related to, but different from fit in mechanical engineering, which is a designed-in clearance or interference between two parts.

  8. Pressure drop - Wikipedia

    en.wikipedia.org/wiki/Pressure_drop

    Pressure drop in piping is directly proportional to the length of the piping—for example, a pipe with twice the length will have twice the pressure drop, given the same flow rate. [8] Piping fittings (such as elbow and tee joints) generally lead to greater pressure drop than straight pipe. As such, a number of correlations have been developed ...

  9. Reduction drive - Wikipedia

    en.wikipedia.org/wiki/Reduction_drive

    Reduction drive (also with a transformation of the direction of rotation) A reduction drive is a mechanical device to shift rotational speed. A planetary reduction drive is a small scale version using ball bearings in an epicyclic arrangement instead of toothed gears.

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