As you can see from the graph above, as viscosities of the fluid increases, the discharge capacity of the pump decreases.

Points to remember when pumping high viscous fluids:

  1. Position the pump close to or below the level of the fluid source.
  2. Suction lines should be increased in size – up to 3 times the size of the pump manifold inlet. Dual manifolds may be used when available.
  3. Start the pump slowly using a control valve on the air line.
  4. If greater capacity is required, select a larger pump. 

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