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