Triple Offset Cryogenic Valve
Size RangeNPS 3 - 80 (DN 80 - 2000)
Pressure ClassASME Class 150 - 900
Standard Connections Flanged
Features & Benefits
DESIGN FEATURES:
Triple-offset Disc Rotation: Offers a bubble-tight seal with exceptional precision, ensuring there is no rubbing or galling during operation. This unique design guarantees a reliable and long-lasting sealing performance.
Cryogenic Stem Packing: Crafted from a combination of superposed Viton O-rings and expanded graphite rings, which have been approved for fire safety. This sophisticated packing system is engineered to withstand extreme cryogenic conditions, providing enhanced durability and safety.
Low Fugitive Emissions: Complies rigorously with the international standards of ISO 15848/Ta-Luft, significantly reducing the release of harmful emissions. This makes the product environmentally friendly and suitable for applications where emission control is of utmost importance.
Cavity-free Design: Eliminates the presence of any cavities, effectively preventing the accumulation and build-up of solids. This innovative feature ensures the product remains clog-free and operates smoothly in various environments.
Drainage Capability: The bottom cover can be easily removed when drainage is necessary, allowing for convenient and efficient maintenance. This practical design feature ensures that any excess liquid can be quickly and effectively drained, preventing potential issues.
Internal Blow-out Protection: Incorporates a robust internal mechanism that safeguards the shaft from being blown out under high pressure. This crucial safety feature provides peace of mind and ensures the integrity of the product even in the most demanding conditions.
Inherent Fire Safe Function: Constructed with stainless steel and equipped with a metallic seal, the product inherently possesses a fire safe function. This ensures that in the event of a fire, the product will maintain its structural integrity and prevent the spread of flames, enhancing overall safety.
Extended Bonnet: Features an extended bonnet design with an adequate gas column, which effectively isolates the stem packing from cold fluids. The length of the extended bonnet has been certified by major classification societies, making it fully qualified for use in LNG applications where strict standards apply.
Actuator Options: Available with a variety of actuators including manual, pneumatic (single or double-acting types), electric, or hydraulic, all customized to meet specific customer specifications. The actuator can be configured for either an ON/OFF or MODULATING function, depending on the application requirements. Additionally, fast-acting actuators for Emergency Shut Down (ESD) are also available, providing rapid response in emergency situations.
High Quality Castings: Undergoes comprehensive quality control measures including radiographic control, dye penetrant testing, ferrite content control, and impact testing at -196ºC, all in accordance with customers’ specific requirements. This meticulous attention to quality ensures that the castings are of the highest standard and capable of withstanding harsh operating conditions.
Reinforced Stainless Steel Shaft Bearings: Engineered to withstand high cycles and ensure smooth operation even at extremely low temperatures. These bearings are a testament to the product's durability and reliability, even in the most challenging environments.
High Reliability: Meets the stringent Safety Integrity Level requirements as per IEC 61508, guaranteeing a high level of dependability and safety in its operation. This makes the product a trusted choice for critical applications where reliability is non-negotiable.
