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| Quantity: | |
|---|---|
Double Eccentric Design
The disc and shaft are offset from the valve centerline, reducing friction and wear during operation. This design ensures bi-directional sealing and extends service life1011.
Superior Sealing
Utilizes resilient seats (e.g., EPDM, PTFE) or fire-safe metal seats for zero leakage. PTFE-lined seats resist chemicals and high temperatures up to 200°C (392°F)111.
Pneumatic Actuation
Compatible with ISO 5211 actuators for quick 90° operation, ideal for automation. Includes fail-safe options (spring-return) for critical applications611.
Lightweight & Compact
Up to 50% lighter than gate valves, reducing structural support costs110.
Corrosion Resistance
Constructed from materials like ductile iron, stainless steel (SS304/316), or CF8M for harsh environments (acids, alkalis, seawater)110.
Low Maintenance
Pin-less disc-shaft connection simplifies part replacement, while self-energized seats minimize wear11.
Oil & Gas: Pipeline isolation, refinery processes, and LNG handling1011.
Chemical Processing: Corrosive fluid control (acids, solvents) with PTFE-lined seats111.
Power Generation: Steam and cooling water systems in thermal plants10.
Water Treatment: Chlorine and ozone resistance in disinfection systems1.
HVAC: High-pressure steam and chilled water regulation11.
| Parameter | Details |
|---|---|
| Size Range | DN50 (2") to DN1200 (48") |
| Pressure Rating | ANSI Class 150/300, PN16/25/40 |
| Temperature Range | -29°C to +400°C (PTFE: -29°C to +200°C; metal seats: up to +400°C)11 |
| Materials | Body: WCB, CF8M; Disc: SS316 with hard coating; Seat: PTFE, EPDM, metal11011 |
| Actuator Standards | ISO 5211, ATEX (for explosive environments)611 |
| Flange Standards | ASME B16.5, EN 1092, DIN111 |
Regular Inspections
Check seals, disc alignment, and actuator function every 6–12 months611.
Lubrication
Apply high-temperature grease to the stem annually (if non-lubricated design)11.
Seat Replacement
Replace PTFE seats every 5–7 years; metal seats last longer but require inspection for erosion11.
Avoid Over-Tightening
Use torque wrenches during installation to prevent seat deformation6.
Certifications: Complies with API 609, ISO 5752, and fire-safe standards (API 607)1011.
Cost Efficiency: Lower lifecycle costs due to reduced maintenance and energy consumption110.
Customization: Options include gear operators, extended necks for insulation, and exotic alloys (e.g., Monel, Hastelloy)11.
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Meta Descriptions: Highlight benefits like "Bi-directional sealing, ISO-certified pneumatic butterfly valves for corrosive fluids—explore now."
Header Tags: Structure content with H2/H3 headers like "Applications in Oil & Gas Industries" or "Maintenance Best Practices."
Image Alt Text: Include descriptive text (e.g., "Double eccentric butterfly valve installation diagram").
Backlinks: Partner with industrial directories or blogs (e.g., chemical processing forums)10
