Sure Seal Inc.’s tapered-seat design of its LBF Series Lined butterfly valves has received Patent No. 7,758,017. All Sure Seal LBF Series Lined butterfly valves are available in 12 different sizes, from 2in to 24in have been designed and engineered for demanding applications in corrosive, sanitary and ultra-pure processes, especially the handling of products native to the chlorine gas, chlor alkali, petrochemical, textile, pharmaceutical, semiconductor, mining, pulp and paper, wastewater, and agriculture industries. The design of the LBF valves features spherically molded and machined, wide-liner sealing surfaces that are securely anchored within the faces of the valve body by a series of concentric serrations, resulting in the reduction of radial cold flow. Sure Seal offers Dupont NXT molecularly enhanced Teflon® as a standard liner, but also provides PFA, UHMWPE, ETFE (Tefzel) and PVDF liners. The PFA/ProTef disc/liner provides corrosion resistance due to its molecular enhanced PTFE construction that ensures the densest seat possible. Disc materials are offered in PFA, UHMWPE, PVDF, 316 stainless steel, Hastelloy C, and titanium. In addition, FDA-grade materials are available with the LBF (flanged) product line. Valves are offered in both ANSI and DIN configurations.
