TEKO Industry Co., Limited
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Duel Offset Design Spring Return Pneumatic Operated Butterfly Valve
| Sizes: | 3" through 48" (80 through 1200 mm) |
| Ratings: | ASME CL150 – CL600 |
| Connections: | Wafer, Lugged, Raised Face Flanged, RTJ Optional, EN Flange |
| Body Face to Face: | Wafer and lugged bodies API 609 Table-3 (A) (Category B Valves up to 24”) Double flanged short pattern: API609 table 3 (C) (Category B Valves up to 24”) |
| Body Materials: | Carbon steel WCC, Stainless steel CF8M, Low Temperature Carbon Steel LCC, Others on request Trim: Triple Offset |
| Seat Leakage: | Class IV (Standard) per IEC 60534-4 &ANSI/FCI 70-2 Class V & VI (Optional) per IEC 60534-4 &ANSI/FCI 70-2 Zero Leakage (API 598) |
| Inherent Characteristics: | Equal percentage |
| Actuator: | Spring-Diaphragm, Scotch Yoke Piston, Manual Gear, Others on request |
What is Triple offset design
1st eccentricity
The shaft is diverged from centerline of sealing surface.
2nd eccentricity:
The shaft is diverged from centerline of the pipeline and valve. These two eccentricities are designed for friction reduction between the valve seat and seal ring when opening and closing the valve.
3rd eccentricity
It makes the valve set completely separated from the seal ring through the geometric shape, during the whole process of opening and closing the valve. The special eccentric combination not only makes use of the cam effect, but also completely eliminates friction. It enables no friction between the valve seat and seal ring on the valve plate, to eliminate possible abrasion and leakage, in the 90°stroke of the valve.
Applications:
High performance applications such as steam, chilled water, gasoline, oil, jet fuels, natural gas, utility lines, process lines and in industries such as:
• Power Generation
• Oil and Gas
• Refineries
• Chemical and Petrochemical
• Steel and Mining
• Pulp and Paper
• Food and Beverage