Seeking advice from experts on the site: pump for draining vacuum tanks with a suction range of around 10 meters
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The medium inside our vacuum tank is steam condensate, with a absolute pressure of 50 KPa and a temperature of 81°C. We are looking for a water pump with a high suction capacity to remove the water from the tank; we need a lift of around 40 meters and a flow rate of approximately 5 tons. Could any member recommend one for us?
50K absolute pressure, and a suction lift of 10 meters? Physical laws do not permit it
Should the suction lift not be greater than the vacuum level? Is there a problem?
A 10-meter water column corresponds to roughly 100 KPa. If you draw up 10 meters of water, the absolute pressure is only 50 KPa; at the pump inlet, is the absolute pressure negative? Can the absolute pressure become negative? Even when water is drawn up from a surface at normal atmospheric pressure, in flat areas, taking pipe losses and net positive suction head into account, the maximum lifting height achievable by a pump is around 8 meters
Emptying it out first should be done. Without venting, can the pump draw water away?