7720 HARDESON RD K & H PRINTING 2025-01-31

tqC0 Fire & Buildings Products Technical Services: Tel: (800) 381-9312/ Fax: (800)791-5500 Model BFV-N Butterfly Valve Wafer Style 21nch - 12 Inch (DN50 - DN300) General Technical Description Data ' The Model BFV-N Wafer Style Butter- Model fly Valves (Ref. Figure 1) are indicat- BFV-N ing type valves designed for use in fire Sizes:ANSI Inches/DN protection systems where a visual in- 2 (DN50), 2-1/2(DN65), 3 (DN80), dication is required as to whether the 4(DN100), 5(DN125), 6(DN150), valve is open or closed.They are used, 8(DN200), 10(DN250), 12 (DN300) for example, as system, sectional, and Approvals pump water control valves. They are The 2 through 12 inch (DN50 - DN300) suitable for installation between ANSI Model BFV-N Wafer Style Butterfly Class 125 or 150 flanges without the Valves are UL and C-UL Listed and FM need for flange gaskets. Approved. For applications requiring supervision In addition, the Model BFV-N Wafer of the open position of the valve, the Style Butterfly Valves are listed by the Gear Operators for the Model BFV-N California State Fire Marshall under Butterfly Valves are provided with Listing No.7770-1670:101. two sets of factory installed internal switches each having SPDT contacts. All laboratory listings and approvals are The supervisory switches transfer their for indoor and outdoor use. Friction Loss electrical contacts when there is move- Maximum Working Pressure The approximate friction loss, based ment from the valve's normal open po- 250 psi (17,2) bar on the Hazen Williams formula and ex- sition during the first two revolutions of Materials of Construction: pressed in equivalent length of pipe the handwheel. Body with C= 120, is as follows. Unless oth- WARNINGS Ductile iron conforming to ASTM A-536 erwise indicated, the data is based on The Model BFV-N Wafer Style Butter- Disc friction loss information collected at a flyValves described herein must be in- typical flow rate of 15 feet per second. Ductile iron conforming to ASTM A-395, .4.4 feet of 2 inch Sch. 40 pipe for stalled and maintained in compliance Nickel Plated with this document, as well as with the the 2 inch valve. applicable standards of the National Seat Material • 6.2 feet of 2-1/2 inch Sch. 40 pipe Fire Protection Association, in addition Grade EPDM "E" rubber conforming for the 2-1/2 inch valve. to the standards of any other authori- to ASTM D-2000 • 7.6 feet of 3 inch Sch. 40 pipe for ties having jurisdiction. Failure to do Upper Stem the 3 inch valve. so may impair the performance of Type 416 Stainless Steel conforming •9.2 feet of 4 inch Sch. 40 pipe for these devices. to ASTM 582 the 4 inch valve. The owner is responsible for maintain- Operator •9.0 feet* of 5 inch Sch. 40 pipe for ing their fire protection system and de- Gear operator with iron housing the 5 inch valve. vices in proper operating condition. • 8.2 feet of 6 inch Sch. 40 pipe for The installing contractor or sprinkler the 6 inch valve. manufacturer should be contacted • 12.7 feet*of 8 inch Sch.30 pipe for with any questions. the 8 inch valve. •20.1 feet*of 10 inch Sch.30 pipe for the 10 inch valve. •22.3 feet* of 12 inch Sch. 30 pipe for the 12 inch valve. *NFPA 13 Page 1 of 4 MAY, 2007 TFP1515