If you introduce O3 (or an O2/O3 mixture?) into a pump, an important issue will be the selection of corrosion resistant materials and seals.
ET
www.vacuum-guide.com
it is relatively large, what is your application ?
(air, vapours, explosive gases, corrosive,...?)
The directory for vacuum pump suppliers
is www.vacuum-guide.com
for the first membrane screening we offer a "revolver"-module to test 4 membranes (tubular membranes) in parallel (common feed and retentate, 4x separate permeates). The 4 membranes have different cut-offs and/or are coming from different manufacturers. It makes you screening much faster and you...
Sampi,
specify the absolute pressure for each of the 3 connections (Inlet / Outlet / motive)
and specify the suction flow (mass flow and Molecular weight).
Suppliers in South Africa:
http://www.vacuum-guide.com/firmenlisten/laender/southafrica.htm
vacuum ejector manufacturers...
Not the rotation speed but the tip speed is important for your sizing: 19.6 m/s for the first stage and 23.5 m/s for the compressor are perfect.
Liquid ring vacuum pumps require a tip speed in the range 16 - 20 m/s, LR-compressors are running in the range 20 - 30 m/s (depending of design and...
Regarding Performances the European manufacturers use
PNEUROP 6612 (1984) – Acceptance Specification for Liquid Ring Vacuum Pumps 9.50
The Pneurope guidelines specify
- a. the standard test conditions
- b. how to to estimate the effective suction capacity (with the effective gas inlet Temp...
sorry, the adress for NSB Gas compression is:
http://www.nsbgas.com/prospekte%20PDF/SB-kompressor/PRSBE_Jan_2003_MA-WEB.pdf
Torricelli
www.vacuum-guide.com
The two adresses for "high-pressure" liquid ring compressors are GARO (Italy) and NSB (Switzerland).
GARO on the Nash homepage:
http://www.nash-elmo.com/english/news-nash_elmo/document.cfm?MainMenu=NavNews&TierMenu=TierPress&NewsID=46
NSB Gas Compression...
I agree with your conclusion:
quantity of ethanol in a saturated mixture is
m = (PVP.V) / R.T
but my assumption would be TP=PVP+PAP
TP (total pressure) = PVP (partial vapour pressure of EtOH) + PAP (partial air pressure).
TP = Patm. = const. as long as Tamb. const.
i am not sure if you will find a larger pump. The answer is very probably to design a multi-stage system combining the high-vacuum-pump and a roughing pump(s).
a suppliers list is available under
www.vacuum-guide.com/firmenlisten/ produkte/turbomolecular_pump.htm
worst case will happen during the evacuation from atm. pressure to the operating pressure.
25362's info is of interest for multistage systems (for example roots blower + liquid ring vacuum pump): If you are able to make sure that the vacuum blower is never running at a pressure higher than the...
