Tool family
The MKS Type 253B Exhaust Throttle Valve is a butterfly valve designed to regulate gas removal from a vacuum chamber when used with an MKS controller. The 253B model line is available with multiple flange types, including CF, KF Style ISO, NW Style ISO, ASA, and JIS.
The MKS Type 253B Exhaust Throttle Valve is a butterfly valve designed to regulate gas removal from a vacuum chamber when used with an MKS controller. The 253B model line is available with multiple flange types, including CF, KF Style ISO, NW Style ISO, ASA, and JIS.
Cited variants
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| 253B-2-2-1 | — | — | ASA flange variant with 1.88 in inside diameter, ASA 2 in mounting flange, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-2-2-2 | — | — | ASA flange variant with 1.950 in inside diameter, ASA 2 in mounting flange, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-60-2-1 | — | — | ASA flange variant with 2.362 in inside diameter, ASA 2 in mounting flange, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-60-2-2 | — | — | ASA flange variant with 2.362 in inside diameter, ASA 2 in mounting flange, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-3-2-2 | — | — | ASA flange variant with 3.025 in inside diameter, ASA 2 in mounting flange, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-3-3-2 | — | — | ASA flange variant with 3.025 in inside diameter, ASA 3 in mounting flange, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-4-3-2 | — | — | ASA flange variant with 3.965 in inside diameter, ASA 3 in mounting flange, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-20-40-1 | — | — | KF-40 variant with 0.779 in inside diameter, 2.75 in outside diameter unheated, 3.00 in with heater option, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-20-40-2 | — | — | KF-40 variant with 0.779 in inside diameter, 2.75 in outside diameter unheated, 3.00 in with heater option, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-1-40-1 | — | — | KF-40 variant with 1.270 in inside diameter, 2.75 in outside diameter unheated, 3.00 in with heater option, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-1-40-2 | — | — | KF-40 variant with 1.270 in inside diameter, 2.75 in outside diameter unheated, 3.00 in with heater option, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-2-50-1 | — | — | KF-50 variant with 1.888 in inside diameter, 3.25 in outside diameter unheated, 3.50 in with heater option, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-2-50-2 | — | — | KF-50 variant with 2.000 in inside diameter, 3.25 in outside diameter unheated, 3.50 in with heater option, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-60-63-1 | — | — | NW-63 variant with 2.362 in inside diameter, NW-63 mounting flange, 5.95 in outside diameter, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-60-63-2 | — | — | NW-63 variant with 2.362 in inside diameter, NW-63 mounting flange, 5.95 in outside diameter, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-3-80-2 | — | — | NW-80 variant with 3.000 in inside diameter, NW-80 mounting flange, 5.95 in outside diameter, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-20-2CF-1 | — | — | 2¾ in CF variant with 0.779 in inside diameter, 2.75 in outside diameter, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-20-2CF-2 | — | — | 2¾ in CF variant with 0.779 in inside diameter, 2.75 in outside diameter, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-1-2CF-1 | — | — | 2¾ in CF variant with 1.270 in inside diameter, 2.75 in outside diameter, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-1-2CF-2 | — | — | 2¾ in CF variant with 1.270 in inside diameter, 2.75 in outside diameter, and no flapper seal. | nanofab.utah.edu[1] |
| 253B-2-3CF-1 | — | — | 3⅜ in CF variant with 1.888 in inside diameter, 3.25 in outside diameter, and Viton flapper seal. | nanofab.utah.edu[1] |
| 253B-2-3CF-2 | — | — | 3⅜ in CF variant with 2.000 in inside diameter, 3.25 in outside diameter, and no flapper seal. | nanofab.utah.edu[1] |