- 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
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 |
| Customer requirements | Challenge | Solution |
|---|---|---|
| Special purity requirements | Thorough cleaning required to remove all surface contaminants after production; completely free of oil and grease; no particles present on surfaces that come into contact with the medium | Special controlled cleaning procedure; valve assembly in a clean room; special marking of parts and valves; trained staff |
| Avoidance of ignition sources | Careful material pairing and special engineered design | Collaboration with internationally renowned oxygen experts; good engineering practice and compliance with standards and regulations; special material database based on internal material testing; risk analyses |
| 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 |
| Excellent energy efficiency | Considerable difference between operating and ambient temperatures | The design can be directly adapted to allow the valve to fit into the cold box. A cover plate seals the installation to the atmosphere. |
| Quick and easy in-line servicing | Valve is completely enclosed and insulated | Top-entry design allows access to all parts subject to wear without removing the cold box or insulation |
| Inclined mounting position | Cold medium rises into the cryogenic extension bonnet | The standard circulation inhibitor prevents circulation of the medium in the cryogenic extension bonnet. |