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Taha
Participant

Join Date: Sep 2009
Posts: 2

LOX Pump Selection

12/04/2009 2:42 PM

Dear Friends

What type of cryogenic pump you suggest for following specification?(reciprocating or centrifugal)

Inlet Pressure:1.1 bar

Outlet Pressure: 23 bar

Flow: 4700 Nm3/h = 110 lit/min

Inlet Temp.: -184 degree centigrade

Thanks
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Steve S.
Guru

Join Date: Aug 2007
Posts: 1790
Good Answers: 87
#1

Re: LOX Pump Selection

12/04/2009 8:54 PM

Sounds like a recip to me.... Please be careful messing with LOX....
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Anonymous Poster
#2

Re: LOX Pump Selection

12/05/2009 6:29 AM

We have three Centrifugal operating at between 10 and 21 Bar discharge pressure ( Controlled witha Variable drive) with a suction pressure of 1 Bar....

Do not forget to purge the electric motor with Nitrogen at all times.... In our motors I drilled two 10mm & threaded a 10mm hole, one (N2 Inlet) is near the drive side of the motor & the second is on the non drive end... the N2 passes via a PCV via a flow switch which shutsdown the pump/motor is the N2 purge fails...

We also installed Mechanical seal leak detection...which also shutsdown the pump if a LOX leak is detected (PT100 set at -75ºC)..
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Taha
Participant

Join Date: Sep 2009
Posts: 2
#3
In reply to #2

Re: LOX Pump Selection

12/08/2009 5:17 AM

Dear sir Thank you so much for your valuable and nice advices specially about purging gas. How about using reciprocating pump? (for case with 4700 Nm3/h and 23 bar pressure) The suppliers like Cryostar and Venzetti offered us to use centrifugal type. The working point on flow-pressure diagram shows that pump works at 22% efficiency. Is this a accepted value?
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Previous in Forum: Dual Stencilling of API 5L Pipe (i.e. X42/X52)   Next in Forum: Wanted: Ball Bearing 12.6*28*8
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