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| Design: | Bi-directional Seal | Material: | WCB, CF8, CF8M |
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| Disc: | Stainless Steel | Seat: | RPTFE, Viton, Fire Safe |
| Port Size: | 16"~86" | Fire Safe: | Availabe |
| Applications: | High Temperature, Vaccum | ||
| High Light: | Hastelloy High Performance Butterfly Valves,6 Wafer High Performance Butterfly Valves,WCB High Performance Butterfly Valves |
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Gear Op Two Offset Hastelloy High Performance 6 Wafer Butterfly Valve
Double offset butterfly valve is an HPBFV rated for ANSI (285 @ 100F or 100 psig @ 400F for 150# ANSI) rated applications. For this type of valve, the disc and stem are double offset, (set back behind the disc and to the side) causing the disc to rotate into place upon closure without significant seat contact. Different from an RSBFV, the stem is located behind the disc, which enables the disc to “rub” over the seat in the last 10% of travel, during the 90-degree rotation.
This seat usually is some type of Reinforced Teflon or for high temperatures above 450F, the seat can be metal, usually a hardened metal, like Stellite. The most user-friendly allow removal/replacement of the stem, disc, and seat without welding
Material List
| No. | Part Name | Carbon Steel | Stainless Steel | |
| 1 | Body | ASTM A216 WCB | ASTM A351 CF8 | ASTM A351 CF8M |
| 2 | Disc | ASTM A351 CF8 | ASTM A351 CF8 | ASTM A351 CF8M |
| 3 | Insert | Carbon Steel | 316 | 316 |
| 4 | Seat | RPTFE or PPL | ||
| 5 | Shaft | 17-4PH | 17-4PH | 17-4PH |
| 6 | Packing Gland | ASTM A216 WCB | ASTM A351 CF8 | ASTM A351 CF8M |
| 7 | Packing | RPTFE | ||
| 8 | Packing Pad | 316 | 316 | 316 |
| 9 | Sleeve | 316+RPTFE | ||
| 10 | Shaft colar | 316 | 316 | 316 |
| 11 | Pin | 17-4PH | 17-4PH | 17-4PH |
| 12 | Bolt, nut | Carbon Steel | SS | SS |
Our Soft Sealing Principle
Based on many years of research, TEKO high performance butterfly vales are used to replace the imported brands and the cost is only one fourth of similar products. It provides bi-dreictional bubble tight shutoff. The unique design creates a self-energized seal both in low pressure and high pressure applications. The rating pressure is from ASME class 150 up to 600 cold working pressures.
Contact Person: sales
Tel: +8613660157288
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