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[8] [9] There are four 18.5 kW rotary lobe pumps manufactured by Börger. Each pump has a capacity of 40 m 3 per hour at a discharge head of 70 m. Normally only two pumps are in operation but if the ingress of water increases all four pumps automatically operate. [8]
A lobe pump, or rotary lobe pump, is a type of positive displacement pump. It is similar to a gear pump except the lobes are designed to almost meet, rather than touch and turn each other. An early example of a lobe pump is the Roots Blower , patented in 1860 [ 1 ] to blow combustion air to melt iron in blast furnaces, but now more commonly ...
The original gear pump design has been developed into modern and reliable machines capable of working for up to 100,000 hours on important lubrication duties. As well as Gear pumps, Albany produces Centrifugal Pumps, Lobe, and Twin Screw Pumps (based on Stothert & Pitt Design).
Because rotary lobe pumps need to maintain a clearance between the lobes, a single stage Roots blower can pump gas across only a limited pressure differential. If the pump is used beyond its specification, the compression of the gas generates enough heat so that the lobes expand to the point that they jam, damaging the pump.
Different types of pumps are suitable for different applications, for example: a pump's maximum lift height also determines the applications it can be used for. Low-lift pumps are only suitable for the pumping of surface water (e.g., irrigation, drainage of lands, ...), while high-lift pumps allow deep water pumping (e.g., potable water pumping ...
Rotary-type positive displacement: internal and external gear pump, screw pump, lobe pump, shuttle block, flexible vane and sliding vane, circumferential piston, flexible impeller, helical twisted roots (e.g. the Wendelkolben pump) and liquid-ring pumps
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