condensate pump and normal centrifuge pump

The difference applies only in the application, and the design for it. A condensate pump has to handle a liquid that is very close to its boiling point, therefore the volute and impeller shapes have been specially selected for this duty so as to reduce the risk of cavitation.

Otherwise, there is no real difference, in principle.

Condensate pump is named for its intended use to pump condensate the pump can be of any design type. Centrifuge pump is a type of pump.

agree from above comments,

the only thing is for the condensate return may be a smaller capacity, but that also depends on the amount of condensate

Please have a look to API 610 for more information.

where can i get this API610 INFORMATION

You can download the standard API 610 from API web.

i am not getting perfect website for api its showing something applied precision

please give me the link if possible

thank you

"what is the difference between condensate pump and normal centrifuge pump is there difference between impeller design or material"

The pump must be able to handle the temperature of the condensate. In addition a condensate pump must have a net positive suction head. This is usually accomplished by locating the pump 32 or more feet below the condenser in a so called "hot well."

The only pump I know of that would take temerature into account would be a positive Displacement pump.

The higher temperature the pump would have losser tolerances to compensate expansions

No difference. Condensate is water and any normal centrifugal pump will lift it.

The problem starts with the condensate temperature . Above 90C the condensate flashes into steam and implodes on the Impellers damaging them, the rotors, seals & packings and the motor. This is known as pump cavitation as mentioned by PWSlack. This is why in Boiler Feed Pumps it is recommended that the inlet feed be elevated say 4.5 meters for 90C (got to look at the chart for various recommended heights Vs temperature).This is why electrical pumps are prone to constant failure in condensate system irrespective of make & models.

For condensate pumps it is then recommended to intimate the Supplier prior so that he may then opt for pumps with ss impellers & above 100C packings. This then becomes an "Application Item".

To handle condensate 100C non electrical & without any moving parts the ideal condensate pump is the "Condensate Power Pump".

Go to www.Youtube.com type "Condensate Power Pump" & click search to see video of operation both with steam & compressed air.

You will also see a video of how condensate 95C is wasted due to failure of the electrical pump by pump cavitation.