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Activair.cz > > > > >
GVI250
The GV range of stainless steel bellows sealed gate valves are designed for applications requiring overall leak tightness and a minimum of hydrocarbon in the residual atmosphere. These superior quality valves offer high vacuum integrity coupled with maximum conductance.
Features and Benefits
- In situ removal of gate and linkage mechanism for easy servicing
- Virtual leaks eliminated due to vacuum brazed manufacture
- Electropolished finish inside and outside
- Compact design with high conductance
- Long periods of use between maintenance
- Low vibration and shock
- Free choice of orientation
| Technical data | |
| Pressure range | 10-9 mbar to 1 bar (absolute) / 8 x 10-10 - 750 Torr |
| Leak rate | < 10- 9 mbar l s- 1 / 8 x 10-10 Torr l s- 1 |
| Maximum differential pressure on the valve plate | 1 bar / 750 Torr in either direction |
| Maximum differential pressure on the valve plate at opening | 20 mbar / 15 Torr |
| Material of construction | |
| Body, valve plate | AISI 304 stainless steel |
| Mechanism | AISI 304 stainless steel, |
| Bearings | Hardened high carbon chrome steel |
| Circlips | SS PH 15-7 Mo |
| Bellows | AM 350 stainless steel |
| Seals, valve plate | Fluoroelastomer |
| Bonnet | |
| Metal sealed valves | OFHC |
| Other valves | Fluoroelastomer |
| Bakeout temperature | |
| Valve body, valve open | 150 °C (fluoroelastomer bonnet seal) |
| Valve body, valve open | 250 °C (metal bonnet seal) |
| Valve closed | 200 °C |
| Actuator, manual | 200 °C |
| Average life until first service* | 100000 closures |
| Mounting position | Any orientation |
| Flange bore | 250 mm |
| 10 in | |
| Conductance in high vacuum | 23000 ls-1 |
| Approx weight | 73 kg |
* Dependent on the vacuum environment and the opening and closing speed.
- Product datasheet (pdf, 713KB)
