High pressure CASING, low flow/head pumps?

[RossABQ]

I've got a unique application; a cooling loop that has to run at 900 psig, but the pump only needs 100 gpm and 115' TDH. Water is at room temps (say 65 F.).

So the casing and seals on the pump need to be rated to ANSI 600 conditions or better, but the flow rate puts it well above most high pressure pumps I've found. I would think there are some utility boiler circulators in this range, but darned if I can find them.

Know any vendors who cover this range? Thanks in advance!

 

[Whyknot]

There are some low flow high head pumps out there. The only concern I would have is coming back into the pump with 800 to 850 psi suction pressure. Take a look at Hydra-cell or Roto-Jet. These pumps will produce the discharge pressure however you will probably have go to a vented suction tank or somehow reduce your suction pressure to an acceptable level.

 

[RossABQ]

I didn't go into it, but at the moment they are using an atmospheric tank as the suction source; this means the pump has to produce 900 psi from basically 15' suction head. They are using an old boiler feed pump, 1200 psi @ 235 gpm, 250 HP. If you don't reduce suction pressure, the pump HP drops down to the 5 HP range. Other than the pressure requirement, this would be a little in-line B&G Series 90 pump!

I'll check those vendors, thanks!

 

[TenPenny]

You will probably have to look at a small API pump to get something in that pressure class.

 

[pmover]

RossABQ,

clarification is needed on TDH . . .

the original post/request stated:
"a cooling loop that has to run at 900 psig, but the pump only needs 100 gpm and 115' TDH. Water is at room temps (say 65 F.)."

then you state:
"I didn't go into it, but at the moment they are using an atmospheric tank as the suction source; this means the pump has to produce 900 psi from basically 15' suction head."

without doing the calcs, the TDH is helluva more than 115' from 15' suction to 900 psig discharge. 900 psig is roughly 2100'; so TDH is slightly less.

please clarify actual/design conditions so reasonable results are obtained.

thanks!
-pmover

 

[RossABQ]

In the existing system, it is an open system, with perhaps 15' of suction head from a tank. To reduce pumping HP and space, I am proposing a closed system, where the system losses are 50 psi (115') and the suction pressure is a nominal 900 psi, set by an expansion tank.

 

[Artisi]

My suggestion is to contact a few pump vendors as I don't see this duty as being a big issue.

 

[djack77494]

I'll second what Artisi said. This is not a high capacity or a high head pump; it simply has a high superimposed pressure. I think any of your standard centrifugal pump suppliers should be able to handle this.
Doug

 

[RossABQ]

I've found some Gould API-610 pumps with an 870 psig pressure rating and the required flow/head, it may be good enough. Thanks for your help!