YES
253B-1-2CF-2
The MKS Type 253B Exhaust Throttle Valve is a butterfly valve. The MKS Type 253B Exhaust Throttle Valve regulates removal of gas from a vacuum chamber. The MKS Type 253B Exhaust Throttle Valve is available with a CF flange type.[1]
What it is
The MKS Type 253B is an exhaust throttling valve.[1]
What can it run?
Process applications and technology nodes documented for this tool.
- regulating gas removal from a vacuum chamber
- use with a vacuum system
Why won't it start?
Documented failure modes, common issues, and field considerations.
- The manual states that when operating with high vacuum diffusion pumps, pressure above the oil vapor jet should not exceed 0.5 milliTorr.
What do the numbers mean?
Power & electrical2
Vacuum & pumping3
Optics & imaging1
Control & software1
Configuration & options9
Vintage & configurations
Documented models & variants
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| 253B-1-2CF-2 | — | — | CF flange variant with 2.000 in (50.8 mm) inside diameter, 2¾ in CF mounting flange, 2.75 in (69.9 mm) outside diameter, 1.25 in (31.8 mm) thickness, 6 bolt holes, and no flapper seal. | nanofab.utah.edu[1] |
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
What kind of valve is the Type 253B?
The Type 253B is an exhaust throttling valve.[1]
Not publicly documented
The following facts about the 253B-1-2CF-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-1-2CF-2 are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the 253B-1-2CF-2 are not on record.
Answerable by: an engineer who operated it or OEM installation records
The process node or technology generation of the 253B-1-2CF-2 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the 253B-1-2CF-2 are on record.
Answerable by: an OEM parts catalog or a service engineer
No publicly hosted manuals, SOPs, or datasheets for the 253B-1-2CF-2 are on record.
Answerable by: university cleanroom staff or an OEM application specialist
Sources & citations
Sources (1)Every fact above is drawn from these public sources
- [1]nanofab.utah.edu — nanofab.utah.edunanofab.utah.edu
Last updated Oct 9, 2026.
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