pump

i am collecting all my condensate in 12ton tank and i want to pump it in another tank which type of pump will be suitable

is it possible to pump hot water by normal water centrifugal pump?

or i can use condensate pump to pump directly in final tank instead of that 12 ton intermediate tank

please guide me

A specially selected condensate pump is recommended.

thanks for advice

my condensate temperature is 100 degree celcious

i not understand that condensate reciever tank elevated with the pump underneath

is this pump required electrical motor as you said its steam driven motor because our purpose is energy conservation

what is exactly the adequate NPSH

What about condensate pump maintenance

is it having impeller cavitatio problem or something like this another problem any disadvantages

A condensate pump is equipped to be able to run at the 200+ degrees F on a continual basis.

Typically hard faced seals, with appropriate elastomeres EPDM often chosen.

Bearing materials will vary from one pump to another.

Another main concern is having a low NPSHr (Net Positive Suction Head required)

As your condensate is very near the boiling point, the slightest vacuum makes it boil,

and will consequently cavitate inside your pump, causing tremendous damage.

Often you will see condensate receiver tanks elevated with the pump underneath.

This is to insure the pump has adequate NPSH to operate.

Hi Sandeep

From the design point of view,both are considered centrifugal pumps.Depending upon the woking conditions we can clasify each,a condensate extraction pump is used to transfer the condensed steam, as water, from the steam condenser-in a thermal power plant-to deaerator,then to a boiler feed water pump to feed the boiler with treated water.

regarding the suction head,you know that atm. pressure is zero gauge pressure,above this level pressure is considered positive and under it is considered negative. The term negative suction head means that pressure is smaller than zero gauge at suction side of the pump and the term positive suction head means that pressure is higher than zero gauge at suction side of the pump.

according to what is mentioned above,if two pumps are well selected to work at a negative suction head and are,then,connected to the discharge line of another pump,nothing would happen provided that the discharge pressure of both pumps are higher than pressure in the discharge line of the third pump.In this case,you may need to a pressure regulator at discharge side of each pump.

sayed sarhan.

A centrifugal pump is a description of the unit based on its design and condensate pump is term use for its application. Condensate pump is also a centrifugal pump at different design while a centrifugal pump can be applied to condesate aplication.

Negative and positive suction is applicable only to horizontal pumps, whether it is an end suction or a between bearing design. Negative suction head is a definition when your available level of water in the suction side is below the pumps centerline or the base level, and a positive suction head is a term used when the water level in the suction side is above the pumps centerline or the base level. They both have an effect to the performance of the pump.

for the third question . . . . . .

There will be no effect at all if the two pumps have different suction line and have a common discharge line even if it runs at the same time. But if it has a common suction line or a header in the suction line then there will be a great effect in its efficiency or the discharge output.

The shape of your condensate tank can help eliminate cavitation.

If you 12 tonne tank was a square metre in cross section and 12 metres tall and the pump's inlet was at the bottom of the tank you would have a 12 metre positive suction head.

That would stop it boiling.

Is it possible to just syphon it to you alternative tank?

Given that your tank is only 12 tonne/cubic metres is it possible to lift it with a crane to drain it directly to where you want it?

One other point to consider is that, as this is condensate it is important to keep it clean. Are the lines and tanks that you are proposing to use clean and flushed to a suitable standard?

BAB

what is the difference between condensate pump and hot water pump