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Catalog excerpts
![Wafer Style Butterfly - 1](https://img.directindustry.com/pdf/repository_di/26077/wafer-style-butterfly-70941_1m.jpg)
Watts Series BF resilient seated butterfly valve is available insizes 2" - 24" (50-600mm), wafer or lug body design. This series was designed to meet the stringent requirements for HVAC, Irriga-tion, OEM, Commercial and Institutional applications, and whereverpositive shut-off is required for liquids, gases and slurries.Incorporating a 200 psi (13.8 bars)pressure rating for 2" - 12" (50-300mm) and a 150 psi (10.3 bars) pressure rating 14"- 24" (350-600mm), the Series BF is standardly constructed of a cast ironbody, ductile iron, aluminum bronze or 316SS disc and 416SS shaft. A phenolic-backed seat prevents the seat from collapsing or dislodging and can be replaced in the field. Standard seat ma- terials available include Buna-N and EPDM. In addition to the above features, the Series BF mounting pad design can easily ac-commodate a lever handle, gear operator, and electric or pneu-matic actuators.The Watts Series BF butterfly valves are designed and manufac-tured for use with ANSI 125 or 150 Class flanges and to complywith API 609 and MSS-SP-67. > HANDLE - Ten-position handle is standard. An infinate posi-tioning/locking handle is available as an option on valve sizes 2" through 12" (50-300mm). The infinite position Pos-Lok throttleplate incorporates an infinite-position stop, a memory stop and apadlocking device in the fully closed position. Manual, worm-gear operators are available for all valves and are recommended on 8" thru 24" (200-600mm) sizes. Watts butterfly valves are also avail- able with electric or pneumatic actuators and chain wheel opera- tors to satisfy a wide variety of requirements. > SHAFT - One-piece shaft delivers positive disc-to-seat loca-tion with maximum strength. 416SS is standard with aluminum bronze and ductile iron discs, and 316SS shaft with 316 stainlesssteel disc. SHAFT BUSHINGS - Duralon > bushings (3) provide shaft sup-port for proper shaft alignment and minimize shaft deflection. SHAFT SEAL - Bidirectional shaft seal prevents external con-tamination of stem area and provides backup for the primary shaft seal formed by the disc/seat interface. > The integrally cast, heavy duty four bolt mount-ing pad, coupled with lower operating torque re- quirements, provides easy and cost effectiveautomation with a variety of pneumatic andelectric actuators. BODY - Watts Butterfly Valves are available in Full Lug (BF-03-M2) and Wafer (BF-04-M2) type designed for use between ANSI 125 and 150 flanges. Face-to-face dimensions comply with API609 and MSS-SP-67. All valves are designed to accommodate 2"of insulation. The standard material is ASTM A126 Class B cast iron. DISC - Disc edge is machined and polished 360 ΰ to assureleak-tight shutoff while minimizing operating torque. Positive,disc-to-shaft connection is provided by stainless steel precision taper pins that are vibration proof. > Duralon is a Registered Trademark of Rexnord Corporation. sealing isolates the body componentsfrom the media and provides the primary shaft seal. Available in EPDM and Buna-N. Seat is field replaceable. SEAT - Phenolic backed, non-collapsible, resilient seat is me-chanically secured to provide dead-end service to the full 200 psi (13.8 bars) pressure rating. Seat face eliminates the need for flange gaskets. Full 360 > USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.wattsreg.com Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscda.com Watts product specifications in U.S. customary units and metric are approximate and are providedfor reference only. For precise measurements, please contact Watts Technical Service. Watts re-serves the right to change or modify product design, construction, specifications, or materials with-out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold. size="-1">
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