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CF 2.75″ to CF 1.33″ reducer (CRN275X133) 3D model
Reducers and adapters

CF 2.75″ to CF 1.33″ reducer

CRN275X133: 1 × CF 1.33″ (DN16CF), 1 × CF 2.75″ (DN40CF) ConFlat flanges, 40.4 cm³ of internal volume and 60.9 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

TypeTo CF 1.33″ reducer
Catalog IDCRN275X133
Flanges1 × CF 1.33″ (DN16CF), 1 × CF 2.75″ (DN40CF) ConFlat (CF), knife-edge, copper gasket
Ports2
Internal gas volume40.4 cm³ (0.04 L)
Wetted surface area60.9 cm²
MaterialStainless 304
Overall size69 × 69 × 78 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″ / CF 1.33″ flanges

CF 2.75″ 4-way cross CF 2.75″ 4-way crossC-0275 · CF 2.75″ · 210 cm³CF 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 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 1.33″ blank flange CF 1.33″ blank flangeF0133X000N · CF 1.33″