Bray Two Offset Double Eccentric High Performance Butterfly Valve

Eccentric Double Offset Design Seating

The double offset shaft/disc design ensures bi-directional sealing throughout the full pressure range of the valve. The cam-like action produced by the offset stem and disc, effectively lifts the disc off the seat during the initial opening of the valve, reducing seat wear and eliminating seat deformation at the top and bottom. When the disc is in the open position, there is no contact between the disc and seat. Operating torques are reduced and seat life is extended.

Specifications

Double offset HP butterfly valves are best used for:

Vacuum Service

The drop tight sealing capabilities of TEKO valves are excellent for vacuum service. Soft seated standard valves are suitable for vacuum service to 20 microns. Denote vacuum service on the order.

Dead End Service

TEKO lug bodies for dead-end service are offered as standard in full ANSI Class 150 and 300.

High Temperature Service

Our standard valves are ideally suited for saturated steam applications to 120 psig steam (RPTFE seat). Carbon filled TFM seats and high temperature graphite stem packing can handle pressure up to 200 psig steam.

Strict Test

Shell tested to 150% of rated pressure with the disc open... hydro-static seat tested for bi-directional positive shutoff without leakage at110% of rated pressure. We also test for absence of leakage into valve shaft bearing areas. Only valves meeting a positive shut-off standard are approved for shipment.