Sure Seal LBF Series Lined Butterfly Valves Receive Patent

MINERAL POINT, MO -Sure Seal, Inc., a division of OPW Fluid Transfer Group, is extremely proud to announce that the tapered-seat design of its LBF Series Lined Butterfly Valves has received Patent No. 7,758,017. The tapered-seat design of the LBF Series delivers a butterfly valve that requires lower torque in all services, has improved seat integrity and significantly improves the service life of the valve.

All Sure Seal LBF Series Lined Butterfly Valves-they are available in 12 different sizes, from 2-inch to 24-inch-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. The robust body construction is made to be as strong as the ANSI 125/150 or PN10/16 counter flanges to which it will be fastened, eliminating deflection problems and resulting in improved flange-sealing properties. Additionally, a 360-degree, non-wetted radially loaded elastometric energizer is used to provide uniform pressure to the outer circumference of the liner and disc, ensuring an absolute bubble-tight shutoff. The disc swing is compatible with PTFE and other fluoropolymer-lined piping systems, as well as other metallic, lined and non-metallic piping systems, eliminating the need for spacers during installation.

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.

For more information on Sure Seal LBF Series Lined Butterfly Valves, go to

Sure Seal, Inc., is part of OPW Fluid Transfer Group. Organized in 1998, OPWFTG is part of Dover Corporation and is comprised of market-leading operating companies - each dedicated to designing, manufacturing and distributing world-class solutions that assist in the safe and efficient handling of hazardous bulk products. The Group is comprised of two business units: OPWFTG Global Transportation Business Unit and OPWFTG Global Chemical & Industrial Business Unit. The company's market-leading brands include: OPW Engineered Systems, Midland Manufacturing, Civacon, Knappco, and Sure Seal. The company has manufacturing plants in North America, Europe, Brazil and India and sales offices in Singapore and Shanghai. For more information, please visit or

For Further Information Contact:

Greg Carrino,

Director of Sales & Marketing

OPW Fluid Transfer Group,

Global Chemical & Industrial Unit

(513) 696-1513

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