4 JAMESBURY VALVE SOLUTIONS Wafer-Sphere high-performance butterfly valves Tighter, more reliable sealing What turns an ordinary butterfly valve into a high-performance butterfly valve? It begins with an offset shaft and eccentric disc arrangement. This double offset design transmits a camming action to the disc and swings the disc completely away from the seat. Conventional butterfly valves do not have this feature. This design eliminates wear points around the disc at the top and bottom of the seat, as well as the resulting beading, scuffing, and ultimate tearing and leakage. When closed, the disc cams tightly into its seat to create a dependable tight seal. Double Offset Design The unique sealing system also incorporates a double eccentric disc and shaft design to further extend the effectiveness of the seat. This unique offset design transmits a camming action to the disc and swings the disc completely away from the seat, no jamming or squeegeeing. This design eliminates wear points around the disc at the top and bottom of the seat. When closed, the disc cams tightly into its seat to create a double-tight seal. The combination of the double-offset disc and the flexible-lip seat are especially effective in a full range of applications from high vacuum (1 x10-5 Torr) to 1480 psi (102.1 bar).
RkJQdWJsaXNoZXIy NDE1MjE4