Welding is carried out on the vacuum side of joints whereever possible to prevent virtual leaks.
All valves are helium leak checked at various stages of manufacturing and after final assembly to at least 1x10-9 mbar l/s-1
The quality of manufacture and operational effectiveness of valves has been constantly demonstrated in high and ultra-high vacuum systems throughout the world. |
| Specification VMD |
Valves |
| Operation Pressure: |
Atm. To 1x10-11 mbar |
| Bakeout temperature |
max: 450°C Open / 300°C Closed |
| Leak rate to Atm.: |
<1x10-11 mbar l/s-1 |
| Leak rate to Across seat: |
<1x10-11 mbar l/s-1 |
| Mat. exposed to vacuum: |
SST 304, SST 316, OFHC Copper |
| |
|
| Series |
Conductance l/s-1 |
Close torque kg-cm |
| VMD19 |
10 |
First 150, max. 250 |
| VMD38 |
25 |
First 300, max. 600 |
|
