8407 BROADWAY SECURE SPACE STORAGE 2026-01-02

TFP1515 Page 3 of 4 Installation The BFV-N Wafer Style Butterfly Valves may be installed with flow in either di- rection and can be positioned either horizontally or vertically. They are de- signed for installation between the fac- es of ANSI Class 125 and 150 flanges. The Series BFV-N are self-sealing be- tween mating flanges; therefore, they do not require the use of additional gaskets. The BFV-N may be installed with any pressure class or schedule of pipe or tubing no greaterthan schedule 40 that is listed or approved for fire protection service and installed in accordance with the manufacturers instructions. The wafer bodies have locating lugs to ensure proper centering of the valve body when flange bolts are installed. Refer to Figure 1 for bolt diameter. Bolts and studs must meet the mini- mum strength requirements of ASTM A307 (Grade B), and the nuts must meet the minimum strength require- ments of ASTM A563 (Grade A). Prior to installation, close the valve. Spread the flanges apart to allow the valve to slip easily between the flang- es. Make sure the pipe flange faces are clean of any foreign material such as scale, metal shavings, or weld- ing slag. Insert the valve between the flanges (without flange gaskets). Do not apply lubricant to the seat faces as this may damage the seat materi- al. Be sure to center the valve and do not damage the liner. Relax the sepa- ration of the flanges, install, and hand - tighten all flange bolts. Slowly open the valve, checking for free movement of the disc. If valve opens freely, leave the valve in the open position, and us- ing a cross -draw sequence, tighten all flange bolts until the valve is metal -to - metal with both mating flanges. Rec- ommended tightening torques are list- ed in Table 1. Be certain to keep flange faces as par- allel as possible during and after tight- ening bolts or studs. After final tight- ening, again check the valve for full opening and closing. As applicable, refer to Figure 2 for the internal switch wiring diagram. Conduit and electrical connections are to be made in accordance with the authority having jurisdiction and/ or the National Electrical Code. With reference to Figure 2, the "supervisory switch" is intended for connection to the supervisory circuit of a fire alarm control panel in accordance with NFPA 72. The "auxiliary switch" is intend- ed for the unsupervised connection to auxiliary equipment in accordance with NFPA 70, National Electric Code. SUPERVISORY SWITCH SWITCH SHOWN L J WITH VALVE FULL OPEN w w 0 0 Z Z > > o 0 END OF LINE PANEL RESISTOR F- AUXILIARY GND SWITCH SWITCH SHOWN L J WITH VALVE FULL OPEN 0 w z + eELL POWER + CONTACT RATING 1/2A 0125 VDC 1/4A @ 250 VDC 15.1 A/12HP @ 125, 250 VAC 5A 0 125 VAC •L• FIGURE 2 MODEL BFV-N BUTTERFLY VALVE — INTERNAL SWITCH WIRING DIAGRAM — NOTE For outdoor applications with inter- nal supervisory switches, it is recom- mended that wiring connections be made at a temperature above 15°F (-9°C), in order to insure sufficient flex- ibility of the wire lead insulation. Nominal Recommended Flange Size Minimum Torque ANSI Inches Ft. Lbs DIN (Nm) 2-4 20-30 DN50 - DN100 (27,1 - 40,7) 5-8 33-50 DN125-DN200 (44,7-67,8) 10 53 - 75 DN250 (71,8 - 101,7) 12 80 - 110 DN300 (108,4 - 149,1) TABLE I RECOMMENDED TORQUES