Used Somarakis model 3633.1 vacuum pump. 4000 cfm. Stainless steel casing, iron heads, stainless steel shaft, and iron rotor. 40" drive sheave.
(Note: The original text is already in English. In British English, "cfm" (cubic feet per minute) and measurements in inches are typically understood, but if preferred, you could convert to metric or spell out units. However, as it stands, the text is appropriate for an en-GB audience.)
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