VacuumPart2.ItStillSucks…

CalculatingConductance

• aisradius(ID)• Fo isfororifice,Ft isfortube

• L/aisratiooflength/radius(ID)

• Divideby2foreachright-anglebend

VacuumMaterials

• Stainlesstype304• Aluminum(notanodized)

• Pyrex• Vitono-rings

• NOPLASTIC!!!

Quick-releaseflanges• Quickflange(QF)• Kleinflange(KF;morecommon?)

• AlsoNWorDN

• NamesbasedoninternaldiameterDN16KFis16mm(16-50mm)

• Limitedto120C,10-8 mbar

Sizeswewilllikelyfind.

www.vacuumresearchcorp.com/pdfs/valves/nwflanges06.pdf

Largeflangestandard

• TypicallydesignatedISO,LF,orMF

• Boltedorclamped• O-ringorknife-edgeseal

ISOflangedimensions

Conflat flanges

• Oftendesignated‘CF’• Cugasket,knife-edgesealsonflanges

• BestchoiceforUHV

Feedthroughs

MechanicalPressureGauges

Manometer Anaeroid

MechanicalPressureGauges

BourdonTubeCapacitancemanometer(diaphragm gauge)

ThermalConductivityPressure Gauges

ThermocoupleGauge Pirani Gauge

IonizationGauges

Hotfilamentgauge Coldcathodegauge

Comparisonofgaugetypes