- Minimized loss of energy to the atmosphere thanks to the use of a circulation inhibitor and a cryogenic extension bonnet
- Installation in vacuum-insulated pipelines, air separation plants (cold box) and peripheral plants made possible, optionally with a cover plate
- Valve maintenance possible without removing it from the cold box or removing the insulation
- The valve seat, piston and circulation inhibitor can be accessed after removing the actuator
- Cv coefficients and valve characteristic can be adapted through the use of custom cages
Technical data
| Valve size | NPS 3, 4, 6, 8 |
| Pressure rating | Class 300 to 900 |
| End connections | Butt weld ends ASME B16.25 |
| Seat-piston seal | Metal seal · High-performance metal seal |
| Characteristic | Equal percentage |
| Rangeablity | 60:1 |
| Temperature range | –325 to +149 °F (–196 to +65 °C) |
| Leakage class, ANSI/FCI 70–2 | Metal seal: IV · High-performance metal seal: V |
Typical fields of application
| Customer requirements | Challenge | Solution |
|---|---|---|
| High energy efficiency | Large difference between operating temperature and ambient temperature | Design ensures closure to the environment |
| Quick and easy in-line servicing | Valve can be completely enclosed or insulated | Top-entry design allows access to all parts subject to wear without removing the cold box or insulation |
| Very compact valve unit | High actuator forces are required to handle high pressures | The standard pressure balancing installed allows the use of compact, lightweight actuators |
| Severe service conditions, e.g. due to higher pressure drops, cavitation and flashing | Control of severe service conditions, preventing vibrations, minimizing wear | Rugged cage design |
| Customer requirements | Challenge | Solution |
|---|---|---|
| High energy efficiency | Large difference between operating temperature and ambient temperature | Design ensures closure to the environment |
| Quick and easy in-line servicing | Valve can be completely enclosed or insulated | Top-entry design allows access to all parts subject to wear without removing the cold box or insulation |
| Very compact valve unit | High actuator forces are required to handle high pressures | The standard pressure balancing installed allows the use of compact, lightweight actuators |
| Severe service conditions, e.g. due to higher pressure drops, cavitation and flashing | Control of severe service conditions, preventing vibrations, minimizing wear | Rugged cage design |
| Inclined mounting position | Cold medium rises into the cryogenic extension bonnet | All valves are fitted with a circulation inhibitor to prevent the medium from circulating in the cryogenic extension bonnet |
