Gas Valves: Nupro® Metering Valves
We offer two series of Nupro®'s 316 stainless steel metering valves for controlling the gas flow into vacuum systems. M-series valves allow regulation of medium gas flows at temperatures up to 200°C, while S-series valves provide very fine flow control. The M-series valves are rated to 1,000 psi; the S-series to 2,000 psi. Metering valves, please take note, are not shut-off vlaves and should not be used as such. Attempting to force them shut usually results in needle damage.
Specifications
| Valve Type | Nupro M | Nupro S |
| Max. pressure @21°C (psi) | 1000 | 2000 |
| Fluorocarbon (°C) | -23 to 204 | -23 to 204 |
| Buna-N (°C) | -23 to 149 | -23 to 149 |
| Flow coefficient (Cv) | 0.03 | 0.004 |
| Orifice (mm) | 1.40 | 0.79 |
| Stem taper (incl.angle) | 3° | 1° |
| Turns to open | 8 to 10 | 8 to 12 |
| Dead stop handle | Not required | Yes |
| Used for shut-off | No | No |
| Internal volume (mm3) | 460 | 98 |
Dimensional Drawings
Charts
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