High Flow Pump for 100C water 1

[LiquidGravity]

I'm wondering if this is actually a thing.

Are there pumps that can create at least 4 Bar pressure and a flow rate of 1000 gallons a minute for water that is 80C - 100C?

 

[Latexman]

Affinity Pump Selection Tool

Good Luck,
Latexman

 

[LiquidGravity]

Does cavitation make it impossible?

I believe that it is very difficult to impossible, but want experts to weigh in.

 

[KevinNZ]

Are you referring limits on on hot water flow due to suction head (NPSH) requirements? Easy to pump hot water when the suction head is high.

 

[bimr]

Pumping Hot Water

 

[TugboatEng]

The basic answer is, yes. You need sufficient suction head. This can be achieved with head tanks to add static pressure to the system. There are various types of head tanks available based on height restrictions. Multi-stage pumps will require less static head. Flow control valves will likely be necessary to keep things left on the pump curve. Chemical treatments such as glycol can reduce the cavitation problem but may also reduce the thermal capacity of the system.

 

[LittleInch]

What's the pump inlet pressure?

If it's basically atmospheric then you probably need a can pump to generate the required NPSH.

There are many pumps that can do this but you need to supply more details.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Artisi]

Don't see why multi-stage pumps will make any difference to NPSHr, a design function for entry into the 1st impeller.

As pointed out by others, it will be decided by the inlet NPSHa being in excess of NPSHr combined with a proper evaluation of the pump selection. This would be or should be a large diameter impeller running as slow as possible to achieve the flow /head within the inlet pressure conditions.

For marginal operations near to or at the point of cavitation, if the down stream operation can handle it, a slight air bleed into the pump inlet with quieten and can assist in reducing cavitation damage. Of course this is a fix-up not a design consideration.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[LiquidGravity]

Got it. Thank you to all who responded. I'm not sure how to respond to each individual comment.

It sounds like it is possible to avoid cavitation by creating a higher pressure at the pump / impeller entry.
That could be created by gravity induced pressure or a pressurized tank.

 

[LittleInch]

Just reply in a single post with the persons name at the the beginning of the paragraph.

So e.g.
Artisi - I agree - bid and slow impellor works best.

Liquid Gravity - Either tank pressure or gravity as head needed. The smallest you're likely to need is 3m absolute head. Anything more than that is a benefit.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.