Cryogenic Butterfly Valve
The butterfly valve engineered for cryogenic service excels in tight shut-off and throttling applications. Its triple offset disc movement eliminates concentrated wear on the sealing ring, thereby prolonging its lifespan. Standard body configurations include flanged and butt-welded designs.
The butt-welded type features an extended body to safeguard the sealing area from heat conduction during welding installation.
An inspection door atop the valve body facilitates effortless inspection, maintenance, and replacement of internal components without necessitating valve removal or pipe cutting.
To prevent internal stress in the bonnet during cooldown, all bonnet joints are securely bolted. Additionally, the bonnet is extended to ensure that the gland area remains free from freezing, even at temperatures as low as -196˚C.
The valve can be installed with its shaft facing any direction. The top flange drilling conforms to ISO 5211 standards, making it compatible with a wide range of gears and actuators.
Sizes Range:
NPS 3 to 48 (DN 80 to 1200), larger sizes available upon request.
Body Materials:
Carbon Steel, Stainless Steel; other materials available upon request.
Temperature Range:
-320°F to 842°F (-196°C to 450°C), higher temperatures upon request.
Stem Materials:
17-4PH, 410 Stainless Steel, XM-19 (Nitronic 50).
Maximum Operating Pressure:
ASME Class 150, 300, 600, 900; EN 1092 PN 10, 16, 25, 40, 63, 100, 150.
Seat & Disc Materials:
316 Stainless Steel Hardened for seats; Carbon Steel, Stainless Steel for discs; other materials available upon request.
Body Styles:
Lug, Wafer, Double Flanged, Gate, Buttweld.
Design & Testing Standards:
API 609, ASME B16.34, ASME VIII, API 600; ISO 5208, EN12266-1, API 6D, API 598, BS 6755.
Flange Drilling Standards:
ASME B16.5, ASME B16.47, EN 1092, ISO 7005.
Certifications:
ABS, API 607, ATEX, CRN, ISO 10497, PED, PE(S)R, SIL, TR CU, TSG.
Face-to-Face Dimensions:
API 609, ASME B16.10, ISO 5752, EN 558.
Fugitive Emissions Standards:
ISO 15848-1, API 641, TA Luft.
Applications:
Bulk liquid storage, oil & gas, LNG storage & transportation, steam distribution, power generation, geothermal steam, sugar & ethanol production, pulp & paper liquor, refining, chemical processing, water & wastewater treatment, air separation, and cryogenic services.
Cryogenic Triple Offset valve
DESIGN HIGHLIGHTS:
·Triple-Offset Disc Rotation: Ensures bubble-tight sealing without friction or wear, offering superior performance.
·Cryogenic Stem Packing: Features a combination of Viton O-rings and expanded graphite rings (fire-safe approved), ensuring reliable sealing in extreme cold.
·Low Fugitive Emissions: Compliant with ISO 15848/Ta-Luft standards, minimizing environmental impact.
·Cavity-Free Design: Prevents accumulation of solids, ensuring smooth operation.
·Drainage Capability: Easily removable bottom cover for drainage needs.
·Internal Blow-Out Protection: Safeguards the shaft from pressure-induced ejection.
·Inherent Fire Safety: Constructed with stainless steel and metallic seals, providing inherent fire resistance.
·Extended Bonnet: Designed with a sufficient gas column to shield the stem packing from cold fluids, qualified for LNG applications with approvals from leading classification societies.
·Versatile Actuator Options: Available in manual, pneumatic (single or double-acting), electric, or hydraulic configurations, tailored to customer specifications. Functions include ON/OFF or MODULATING, with fast-acting actuators for Emergency Shut Down (ESD) also offered.
·Premium Casting Quality: Undergoes radiographic inspection, dye penetrant testing, ferrite content control, and impact testing at -196ºC, ensuring robust construction based on customer requirements.
·Reinforced Shaft Bearings: Crafted from stainless steel for high durability and smooth operation at extremely low temperatures.
·High Reliability: Meets Safety Integrity Level requirements as specified by IEC 61508, ensuring dependable performance.
Specifications:
·Size Range: 2" to 24" (DN50 to DN600)
·Pressure Ratings: ASME CLASS 150 to 4500 (PN16 to PN760)
·Temperature Range: -196°C to 816°C (-320°F to 1500°F)
Construction Highlights:
·Bonnet Types: Bolted Bonnet (BB) for ratings up to 900LB, Pressure Seal Bonnet (PSB) for 1500LB and 2500LB
·Body Material: Cast Steel, with options including Monel, Inconel, Hastelloy, Incoloy, Duplex and Super Duplex, Carbon Steel (including Low Temp), Low Alloy Steel, Stainless Steel, and Titanium
·Design Features: Outside Screw & Yoke (OS&Y), Rising Stem, Rising Handwheel, Integral Backseat and Body Seat
·End Connections: Flanged (RF, FF, RTJ, etc.), Butt Weld (BW), Socket Weld (SW), and Threaded
·Operation Methods: Handwheel, Gear, and Actuator ( Pneumatic, Electric, Hydraulic)
Compliance & Standards:
·Design: Adheres to BS 1873, API 623, ASME B16.34
·Dimensions:
·Flanged Ends: ASME B16.5
·Butt Weld Ends: ASME B16.25
·Face to Face: ASME B16.10, EN558, JIS B2002, MSS SP72
·Pressure-Temperature Ratings: ASME B16.34
·Mounting Pad: ISO 5211
·Inspection & Testing: API 598, EN12266, MSS SP82, ISO 5208
·** Fugitive Emission**: ISO 15848, API 624, API 641
·Firesafe: API 607, API 6FA, ISO10497
Optional Features:
·Welded Bonnet
·Extended Bonnet
·Bellow Seal
·Vacuum Function
·Enhanced Fugitive Emission Control
·Compliance with NACE MR-0175 or MR-0103
