YES
The MKS Type 253B Exhaust Throttle Valve is a butterfly valve designed to regulate the removal of gas from a vacuum chamber when used with an MKS controller. The MKS Type 253B Exhaust Throttle Valve can be used with the Type 651, 652, 152G, or 252 (revision D or later) controllers. The MKS Type 253B Exhaust Throttle Valve uses a nonlinear actuator to generate a linear valve transfer characteristic.[1]
The Type 253B is an exhaust throttle valve used in vacuum systems to regulate conductance and maintain a controlled pressure condition.[1]
The Type 253B is used in vacuum processing systems that require controlled exhaust flow.[1]
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The YES 253B-1-40-2 is a vacuum throttling valve.[1]
The Type 253B is an exhaust throttle valve used in vacuum systems to regulate conductance and maintain a controlled pressure condition.[1]
The Type 253B is an exhaust throttle valve.[1]
The following facts about the 253B-1-40-2 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the 253B-1-40-2 are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 253B-1-40-2 are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the 253B-1-40-2 are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the 253B-1-40-2 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 253B-1-40-2 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
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Last updated Oct 9, 2026.