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CF 4.5″ to CF 2.75″ reducer 3D model
Reducers and adapters

CF 4.5″ to CF 2.75″ reducer

1 × CF 2.75″ (DN40CF), 1 × CF 4.5″ (DN63CF) ConFlat flanges, 143.1 cm³ of internal volume and 116.2 cm² of wetted surface.

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Its internal volume and surface area feed the pumpdown simulation, and its 3D characterization sets how it affects pumping speed.

Specifications

TypeTo CF 2.75″ reducer
Flanges1 × CF 2.75″ (DN40CF), 1 × CF 4.5″ (DN63CF) ConFlat (CF), knife-edge, copper gasket
Ports2
Internal gas volume143.1 cm³ (0.143 L)
Wetted surface area116.2 cm²
MaterialStainless 304
Overall size114 × 114 × 75 mm
Outgassing (unbaked, 1 h)6.0e-9 Torr·L/s/cm²
Simulation-readyYes, characterized from its 3D geometry

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 4.5″ / CF 2.75″ flanges

CF 2.75″ 6-port chamber CF 2.75″ 6-port chamberCF 2.75″ · 172 cm³CF 4.5″ 6-port box chamber CF 4.5″ 6-port box chamberCF 4.5″ · 737 cm³CF 2.75″ feedthrough CF 2.75″ feedthroughCF 2.75″ · 2 cm³CF 4.5″ blank flange CF 4.5″ blank flangeCF 4.5″CF 2.75″ blank flange CF 2.75″ blank flangeCF 2.75″CF 2.75″ to CF 1.33″ reducer CF 2.75″ to CF 1.33″ reducerCF 2.75″ / CF 1.33″ · 40 cm³CF 6.0″ to CF 4.5″ reducer CF 6.0″ to CF 4.5″ reducerCF 6.0″ / CF 4.5″ · 556 cm³CF 6.0″ to CF 2.75″ zero-length reducer CF 6.0″ to CF 2.75″ zero-length reducerCF 6.0″ / CF 2.75″ · 33 cm³