The MKS 253B-2-2-2 is a butterfly exhaust throttle valve that regulates gas removal from a vacuum chamber when used with an MKS controller.
Cited variants
| Designation | Generation | Vintage | Changes | Source |
|---|
| 253B-2-2-1 | — | — | Identical to 253B-2-2-2 but includes Viton flapper seal (sealing butterfly valve) | nanofab.utah.edu[1] |
| 253B-60-2-2 | — | — | ASA 2" flange, inside diameter 2.362" (60.0 mm), no flapper seal, controllable conductance TBD | nanofab.utah.edu[1] |