Manual DriveVCR 1/4" on both sides
UHV-Leakvalve Manually Operated VCR 1/4" on both sides
The manual actuator provides the possibility to adjust the gasflow by a handwheel. The stroke from open to close position is divided into ten turns of the handwheel. The handwheel is made of pretected steel. It can be dismantled during baking out.
Key Features
- VCR 1/4" on both sides
- Bakeable up to 300°C (fully operable)
- Manually operated
- Vernier for exact reading of valve position
Technical Specifications
| General | |
| Material Housing | 1.4404 (316L) |
| Material Sealing | 1.4435 (316L) gold plated |
| Material not in contact with gas | 1.4301 (304) |
| Mounting Position | any |
| Internal Pressure | Vacuum to 10 bar |
| Inlet Pressure | 10 bar from each side |
| Tightness Housing | 1*10 -10 mbar.l/s |
| Tightness Valve Seat | 1*10 -10 mbar.l/s |
| Weight | 1,5 kg |
| Stroke: Turns of the Handwheel | 10 |
| max. Tourque | 5 Nm |
| Volumes | |
| Main Flange | 1,0 cm 3 |
| Side Flange | 4.6 cm 3 |
| Bakeout Tempertaure | |
| Valve Housing | 300°C |
| Valve Actuator | 270°C |
Gas Dosing Properties
Closing And Opening
- Idealized measurement protocol: The handwheel is kept stable for one minute after every turn. The reaction is fast and the throughput is stable.
- During the first 3 turns following the open position the diaphragm does not touch the valves seat.
- When using the valve at 20°C control in the range between 10-9 and 10-10 mbarl/s is not possible due to physical restrictions (red area in the diagram). The valve is then tight after the 9th turn. Control in this area needs heating.
- The maximum throughput is 60 mbar*l/s.
Actual measurement protocol: Different leakrates (=throughput) are being appraoched and held for 20 seconds.
Downloads & Documentation
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