Gearing types for WITTE gear pumps

Standard gearing

For WITTE gear pumps, there are three standard gearing types as well as a few special gearing types with smaller or wider gear pumps or adjusted geometries. Straight, helical and herringbone gearings are available to choose from for the pumps. Each of these gearing types have different properties that are important for the use of the gearing type.


Spur gearing

The spur gearing is the standard gearing for WITTE high pressure pumps as well as for the CHEM series. The spur gearing is distinguished through the non-existent axial thrust and has the best volumetric efficiency.

Helical gearing

The helical gearing is mainly used as a standard gearing in polymer applications where a volume flow with the lowest possible pulsation is required. The helical gearing ensures a simultaneously high product quality through its properties. This gearing can be used for applications with differential pressures up to 250 bar.

Herringbone gearing

The herringbone gearing reduces the pulsation of the pumped medium compared to helical and spur gearing. This is an advantage particularly for the quality of the end product.

  • Less pulsation
  • Lower stress of polymer / shearing
  • Lower heating of product (dependent on process)
  • Alteration of existing pumps possible

Can be used for:

Can be used for:

Can be used for:

Spur gearing

Viscosities:
Low, as high pressure variation also high viscosities
Differential pressure:
120 bar, as high pressure variation also up to 250 bar
Volumetric efficiency:
High
Pulsation:
Available

Helical gearing

Viscosities:
Medium to high viscosities
Differential pressure:
250 bar
Volumetric efficiency:
High
Pulsation:
Less pulsation than the spur gear

Herringbone gearing

Viscosities:
Medium to high viscosities
Differential pressure:
250 bar
Volumetric efficiency:
Low
Pulsation:
Low
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