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Recent content by dwhitlock

  1. dwhitlock

    Resonance with toothed drive belts

    We have an acute noise problem caused by resonance of a small toothed drive system Polyurethane belt driving 0.5 KW via a 50 mm pulley to a 180 mm pulley It is a standard belt and "cogged pulley" rather than a zero backlash.cre Any comments much appreciated Corrosionman
  2. dwhitlock

    Estuary water massive corrosion rate

    My Client put in a new large manifold 4 years ago eight foot dia with 6 ft dia branches and 6 ft butterfly valves Manifold is 12 mm thick mild steel but only a thin epoxy paint coat about 100 microns. thick The estuary water varies round about 50 psi pressure The system has developed...
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