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  • Users: dadfap
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  1. dadfap

    System curves

    Is a flat system curve typical of a discharge system that is characterised by friction losses rather than any vertical lift component? In a flat system curve, a change in the speed of the pump by a VFD will not 100% follow the affinity laws? Thanks DADFAP
  2. dadfap

    Rockwell hardness scale

    Does anyone have a graphical representation of the Rockwell scale, showing differing metals and sand? Thanks dadfap
  3. dadfap

    Genset size recommendations

    I am working on project that is using gensets to drive motors for centrifugal pumps and no-one is ready to recommend genset sizes. Details Motors are 127HP, 255Hp & 537HP @ 50Hz (all 380v) Will be starated on digital soft staarters Loads are centrifugal pumps. Generators my client has...
  4. dadfap

    mm/s to "g" conversion

    Is there a simple way to convert mm/s to "g", or a way to establish a relationship between the two? On the surface of it it seems to me that whilst the two are related, in terms of vibration, one revers to velocity and the other to force / acceleration. Any help would be...

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