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  1. delimashare

    Gear Design

    Hi Everybody, I have to design 3 gear assemblies which run a switchgear inside an enclosure. Here I attach a drawing for one gear only(for a similar project). I have to do my calculations and select the diameter, length, cross section, material...etc. for the linkages, shafts, axles, chains...
  2. delimashare

    gear design

    Hi Everybody, I posted a question about gear design on a physics forum,unfortunately I didn't get any reply. Here is my question: I have to design 3 gear assemblies which run a switchgear inside an enclosure. Here I attach a drawing for one gear only(for a similar project). I have to do my...
  3. delimashare

    fan selection based on static pressure

    Hi Everybody Sorry to take you back to thread 403-43928 by VEEKRISH AND TO THREAD 403-31557 by juan2025...My question is : I want to pressurize a building by adding an intake fan and Iam calculating the fan cfm based on equation: P1V1=P2V2 P1=ATMOSPHERIC PRESSURE V1=VOLUME OF BUILDING P2=STATIC...
  4. delimashare

    ISA S71.04

    Hi I/O buildings shall be maintained at a G1 severity level as per ISA S71.04 I read this sentence in the specification of a project.I don't know what is exactly meant by this! How is this tested? Is it a certification for the equipments in the building, or it is a test on the environment...
  5. delimashare

    Economizer function in A/C units

    Hi Please I need an explanation on how ECONOMIZERS work to save energy in A/C wall mount units.My second question is how would using an Economizer in A/C unit affect the pressure inside a building? Thanks
  6. delimashare

    power plant ventilation

    Other than keeping a certain level of filtered air or strelized environment,why do we need a positive pressure inside a room which is equiped with electrical generators or motors.

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