SLIDE 1
Calculating Conductance
- a is radius (ID)
- Fo is for orifice, Ft is for
tube
- L/a is ratio of
length/radius (ID)
- Divide by 2 for each
Vacuum Part 2. It Still Sucks Calculating Conductance a is radius - - PowerPoint PPT Presentation
Vacuum Part 2. It Still Sucks Calculating Conductance a is radius - - PowerPoint PPT Presentation
Vacuum Part 2. It Still Sucks Calculating Conductance a is radius (ID) F o is for orifice, F t is for tube L/a is ratio of length/radius (ID) Divide by 2 for each right-angle bend Vacuum Materials Stainless type 304
SLIDE 2
SLIDE 3
Vacuum Materials
- Stainless type 304
- Aluminum (not
anodized)
- Pyrex
- Viton o-rings
- NO PLASTIC!!!
SLIDE 4
Quick-release flanges
- Quick flange (QF)
- Klein flange (KF; more
common?)
- Also NW or DN
- Names based on internal
diameter DN16KF is 16mm (16-50mm)
- Limited to 120C, 10-8 mbar
SLIDE 5
Sizes we will likely find. www.vacuumresearchcorp.com/pdfs/valves/nwflanges06.pdf
SLIDE 6
Large flange standard
- Typically
designated ISO, LF,
- r MF
- Bolted or clamped
- O-ring or knife-
edge seal
SLIDE 7
ISO flange dimensions
SLIDE 8
Conflat flanges
- Often designated ‘CF’
- Cu gasket, knife-edge
seals on flanges
- Best choice for UHV
SLIDE 9
Feedthroughs
SLIDE 10
Mechanical Pressure Gauges
Manometer Anaeroid
SLIDE 11
Mechanical Pressure Gauges
Bourdon Tube
Capacitance manometer (diaphragm gauge)
SLIDE 12
Thermal ConductivityPressure Gauges
Thermocouple Gauge Pirani Gauge
SLIDE 13
Ionization Gauges
Hot filament gauge Cold cathode gauge
SLIDE 14