Condensate Pumps

You mentioned in one of your old posts to me that there is a "non-electric pump that has a 5-year/5-million cycle warranty" for condensate return. Can you give me the details of the manufacturer and the type of pump? Thanks

I believe it may be Spirax Sarco.

Note:Condensate Power Pumps can be operated both with compressed air and steam.

You can go to following sites to watch a Ducon Condensate Power Pump in operation.

http://www.youtube.com/watch?v=HCQWqpdUF-k

http://www.youtube.com/watch?v=7b0zG4FBrH0&feature=related

http://www.youtube.com/watch?v=Zw27uDrc6m0&feature=related

http://www.youtube.com/watch?v=N50Y-_Ew95E&feature=related

http://www.youtube.com/watch?v=rusbtO3huHw&feature=related

http://www.youtube.com/watch?v=iIDiAAOGovM&feature=related

you can look up my wepage: www.duconems.com

From the field;

With out a doubt removing the steam operated pumps is a good thing...however criminal it is to discard history. I would run your numbers using Watson Mc Daniel Pressure Motive pump/trap sizing. Armstrong also sell a similar product.

If you would like contact John Smagala he is my design/process engineer that assist you with sizing and prices.

johnsmagala@sbcglobal.net

Mike

Since we need to pump the condensate very near to boiling temp, a centrifugal pump will need very high positive head , so that there is no cavitation.

A positive displacement Piston type pump driven by Steam or electricity is better option and would need lesser positive head. Some makers have condensate collection and pumping skid which can be placed to get condensate from steam Traps.

Steam Pump is better option as it does not have to depend on availability of Elctricity for condensate pumping. Particularly if the Utility line fails.

The pumps that I have recomended will perform well in your applications.

It sounds like the source pressure of the condensate is high (possibly over 100 psig).

If this is the case and there is a need for low pressure steam nearby, or some water pre-heating, then you may be able to utilize the energy in the flash steam, and return your condenaste at high temperatures.

Creating a closed system provides the following benefits:

- reduces steam consumption at the boiler

- reduces therm usage

- reduces water usage

- reduces boiler emissions

- increases % of condensate recovery because flash steam is not lost to atmosphere

The following links provide further information to clarify the above point:

http://www.spiraxsarco.com/downloads/case-studies/demulder.pdf

http://www.spiraxsarco.com/resources/cad/applications/condensate-flash-steam/preview/flash-steam.asp?drawing_id=319

To size & select you can go to www.snapfour.com to size and select the right unit for your application.

Good luck on improving condensate recovery, and doing something good for the environment.

Does anybody have an opinion of steam powered condensate pumps vs electrical pumps - There is no pump in the world that can handle cavitation at high temperatures of condensate over 90C and hence, recommended to give heights to avoid this. The only pump that can handle 100C without pump cavitation and without any moving parts or electricity are "Condensate Power Pumps". See the photo on my avtar. You can go web sites: duconems.com, spirax sarco, armstrong, Watson Mcdaniel, Gestra, ITT, Yarway etc., for these type of condsensate power pumps.

I manufacture and use them alot and they are simply "fit & forget" pumps, robust requiring only 3 kg steam/1000 kg condensate pumped, pump when there is something to pump, stops when nothing, not hampered by submerging in pits or a lot of water spraying to keep equipments clean etc.

You can couple them as Duplex to handle upto 15000 kg/hr capacities.

Thank you this is what I was trying to say Thanks for the clarification.

I would run your numbers using Watson Mc Daniel Pressure Motive pump/trap sizing. Armstrong also sell a similar product.

Sorry miketheboilerguy I did not see your post and just replied steam.

Yes you are 100% right first.

I am always happy to see the same answer from another direction.

I am just glad I did not get the claws os the CAT or something.

They don't call you Mike " the Boiler Guy" for nothing.