High Temperature Metal Seated Double Eccentric Flanged Butterfly Valve
 | High Temperature Metal Seated Double Eccentric Flanged Butterfly Valve
|
High Temperature Metal Seated Double Eccentric Flanged Butterfly Valve ：
Metal seated double eccentric flanged butterfly valve adopts multi-layer metal composite sealing ring, specially developed for high temperature, high pressure and weak corrosive working pipeline. The valve body can be customized with cast iron, stainless steel, chrome molybdenum steel and alloy steel as required, while butterfly disc is available in cast steel, stainless steel or chrome molybdenum steel options to match different medium temperature and corrosion conditions. This series flanged butterfly valve covers nominal pressure PN0.6, PN1.0, PN1.6, PN2.5, PN4.0; nominal diameter ranges DN50~DN2000 (DN50~DN1200 for PN40). Supporting worm gear manual, pneumatic and electric three main driving modes, carbon steel version works within -29℃~425℃, stainless steel type can run steadily from -40℃ up to 600℃, widely used for steam, coal gas, petroleum product, acid and alkali weak corrosive fluid in petrochemical, thermal power, metallurgy industries. Double eccentric offset structure eliminates scraping friction between disc and metal sealing ring during opening-closing stroke, greatly prolong sealing service life, leakage rate strictly below 0.1×DN mm³/s complying with GB/T13927-92 standard.
Main Parts Material List
| Valve Body: Cast Iron / Stainless Steel / Chrome Molybdenum Steel / Alloy Steel |
| Butterfly Disc: Cast Steel / Alloy Steel / Stainless Steel / Chrome Molybdenum Steel |
| Seat Ring: Multi-layer composite of stainless steel & high temp asbestos plate |
| Valve Stem: 1Cr13 / 2Cr13 Stainless Steel, Chrome Molybdenum Steel |
| Bearing: Austenitic Stainless Steel, 304 Nitrided ZG00CrNi10 |
| Stem Packing: Flexible Graphite |
1. Worm gear handwheel actuator: Cost-effective manual operation, suitable for on-site manual opening/closing and pipeline maintenance.
2. Pneumatic actuator: Single/double acting design, can equip positioner to realize flow proportional adjustment, widely used for automatic pipeline control.
3. Electric actuator: On-off type & modulating type available, explosion-proof customized version for hazardous petrochemical flammable medium pipeline. Product Core Advantages
1. Multi-layer metal hard sealing design, outstanding high temperature and pressure resistance, can keep stable sealing under high temperature steam and high-pressure oil medium
2. Double eccentric non-contact closing structure, no friction between disc and sealing ring, lower operation torque and longer service life
3. Diversified body material options to satisfy different temperature, pressure and slight corrosion working requirements
4. Strict hydrostatic & air tightness test before delivery, low leakage rate to meet industrial high-standard pipeline requirement.
Application Fields
Our metal seated double eccentric flanged butterfly valves are popular in thermal power plant steam pipeline, petrochemical refining production line, metallurgical high-temperature flue gas pipe, urban coal gas transmission network, oil refinery circulating fluid pipeline. We export bulk valves to Southeast Asia, Middle East, Russia, Europe high-temperature industrial projects, accept customized material and special parameter orders.
