Posts Tagged ‘discharge’

Automatic recirculation valve

Thursday, February 2nd, 2012 von admin

The SSV, a special automatic recirculation valve, automatically protects centrifugal pumps – especially boiler feed water pumps – against wear and damage, as can occur if the pump runs dry or during low-load operation. Typical damages are for example a temperature increase, which can lead to partial evaporation of the medium, or recirculation in the impeller. It can also lead to flow separation and cavitation in the pump. Similarly, increased vibration and mechanical stresses occur in the pump and cause damage. The SSV bypass control valve opens as soon as the process flow demand falls to the same level as the minimum flow required by the pump. In this way, the specified minimum continuous flow required by the pump is maintained, even if there is zero process flow demand.
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High-pressure twin-screw pumps for food and beverage

Thursday, February 2nd, 2012 von admin

In many areas of the food and beverages industry there is a distinct trend towards the use of pumps that are able to reliably manage higher pressure differentials. This trend is due not only to the higher friction losses caused by longer pipelines and increasing flow rates in the production plants but also to the pumping of generally higher-viscosity media that enable savings in terms of energy to heat the media.

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