Energy Intelligence for Pumps and Compressors

Related Vendors

Lutz Pumpen GmbH

Italvacuum, Srl

ProMinent GmbH

DECHEMA e.V.

In practical application, diaphragm pumps are often twice as efficient as centrifugal pumps. However, the efficiency levels which are theoretically possible with displacement pumps are not always achievable, with friction losses being a particular problem.

Friction losses can be broken down as follows:

• gear unit (5 to 40 per cent)

• plunger packing (1 to 20 per cent)

• bearings (up to 3 per cent depending on the oil level)

• churning losses (up to 3 per cent)

• and the hydraulics (2 to X per cent).

Possible solutions are:

• Higher efficiency gear units (toothed gearing, belt transmissions)

• Improved bearing efficiency (no gaskets, lean lubrication, optimal viscosity)

• Lean lubrication with the lowest possible viscosity to minimise churning losses

• Selection of the shortest possible seals with small seal faces

Effective pulsation management on displacement pumps reduces losses by more than one per cent. Under normal conditions, pulsating flow increases pressure losses. Continuous flow saves energy and reduces stress on all system components.

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