Friday, January 3, 2020

Pawl and Ratchet Arrangement



  • When 2 pumping units are fitted and only one is running , the idle pump might be driven in the reverse direction by fluid under pressure by the running pump , if non reverse locking gear wear not fitted .This gear is integral with flexible coupling connecting motor and pump.
  • The pawl fly outward when the motor is running due to centrifugal force .When the motor stops , they come and engage the ratchet thus prevent the pump to rotate in opposite direction.

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