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CF 2.75″ 4-way cross (C-0275) 3D model
Crosses

CF 2.75″ 4-way cross

C-0275: 4 × CF 2.75″ (DN40CF) ConFlat flanges, 209.5 cm³ of internal volume and 224.7 cm² of wetted surface.

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Its internal volume and surface area feed the pumpdown simulation, and its measured transmission probabilities set its molecular conductance in the pumping-speed simulation.

Specifications

Type4-way cross
Catalog IDC-0275
Flanges4 × CF 2.75″ (DN40CF) ConFlat (CF), knife-edge, copper gasket
Ports4
Internal gas volume209.5 cm³ (0.21 L)
Wetted surface area224.7 cm²
MaterialStainless 304
Overall size125 × 125 × 69 mm
Outgassing (unbaked, 1 h)6.0e-9 Torr·L/s/cm²
Molecular transmission dataYes: Monte Carlo port-to-port transmission probabilities

Volume and surface area are computed from the CAD model's enclosed gas space. Material outgassing values are typical published figures.

Parts that mate with CF 2.75″ flanges

CF 2.75″ × CF 1.33″ reducing 4-way cross CF 2.75″ × CF 1.33″ reducing 4-way crossC-0275-133 · CF 2.75″ / CF 1.33″ · 133 cm³CF 2.75″ 5-way cross CF 2.75″ 5-way crossC5-0275 · CF 2.75″ · 253 cm³CF 2.75″ 6-way cross CF 2.75″ 6-way crossC6-0275 · CF 2.75″ · 297 cm³CF 2.75″ vacuum gauge CF 2.75″ vacuum gaugeCCPG-H2-3 · CF 2.75″CF 2.75″ to CF 1.33″ reducer CF 2.75″ to CF 1.33″ reducerCRN275X133 · CF 2.75″ / CF 1.33″ · 40 cm³CF 4.5″ to CF 2.75″ reducer CF 4.5″ to CF 2.75″ reducerCRN450X275 · CF 4.5″ / CF 2.75″ · 143 cm³CF 2.75″ 6-port chamber CF 2.75″ 6-port chamberCU6-0275M · CF 2.75″ · 172 cm³CF 2.75″ blank flange CF 2.75″ blank flangeF0275X000N · CF 2.75″