Page 365 - BOLA Catalogue

TECHNICAL INFORMATION
Tubing - Permeation at short-term use
In case of short-term use of tubes with fluids - gaseous or liquid, no permeation occurs. Only after the passage of the first fluid molecules through the tubing wall, permeation starts. After an initial period, it achieves a constant flow. This can be identified when the permeation value per interval does not change any more. It isnot easy to calculate the permeation start for the individual media such as gases, acids, bases or
solvents as it depends on many factors. Factors which promote permeation are higher temperatures, higher pressure or the addition of filling material. Dyed or electrostatic dischargeable plastics normally show a higher permeation rate than comparable non-filled plastics. The duration which is required for a passage of the fluid through a wall thickness 1 mm, can be defined as follows:
Fluid
ZeitDbuirsaztiuomn uBnetgilinsntadretroPf peermrmeeaatitoionn, b, weiaWllatnhdicsktnärekses 1 mm
LEeaicshiltyflvüoclahtiilgees GgaseswsiuecHhealisuhmel(iHuem) o(Hder) oWrahsysderosgtoefnf (H2)
EinOenSetuhnoduer
Gase mitGraesdeuszwieirtthereFdluücehdtigvokleait,ilzit.yBs. utrcohckaesndersy HCI-Ggas
OEnineTdagy
SchwNeroflnü-cvholtaigteileMmedeideina wsuiechz.wBa. swhäsydsroiguesSscuhlpwheuferilcsäaucride (H2SO4)
MorGertöhßaenroenineTdagy
Filter - Notes
Specification of pore sizes
– what they mean.
Classification 00
0
1
2 3 4 5
*
Typical applications - frequently asked.
Identification P 500
P 250
P 160
P 100 P40 P16 P 1,6
Actually, not available
Pore sizes in μm 250-500* 160-250* 100-160* 40-100
16-40 10-16 1-1,6
in PTFE
Pore size 50 μm
5 μm
1 μm 0,45 μm
0,2 μm 0,05 μm
Application
Filtration of rough particles, gas distribution in liquids
Filtration of medium particles, laboratory filtration, valves for packing (gas permeable, liquid tight)
Filtration of aqueous solutions, removal of particles
Pre-filtration of aqueous solutions, HPLC solutions, protein solutions and alcohols. Sterile filtration of air and other gases
Ultra cleaning of organic solutions and alcohols, sterile filtration of air and other gases
Ultra cleaning of solutions and gases (viruses)
Tips for the use of plastic tubing for easily volatile media !
The installation should be built up in a well-vented room respectively under an extractor hood. In times off from work (such as over night or on the weekend), close the gas supply valve and release pressure.
364
www.bola.de