The most critical aspect of the Series BFV Butterfly Valves is the cartridge seat design, which alleviates installation problems associated with common "dove tail design" seats. Valve torque is lower and more consistent because the seat dynamics do not rely on being mated between two flanges. Precision machining of the disc and body allow the cartridge design to maintain a tighter disc to seat tolerance, providing a perfect low torque seal each and every time the valve is cycled. Seat to disc seal is independent of flange support and capable of full rated dead end service. Select from wafer or lug patterns with either a 10-position locking handle lever or manual gear operator. Standard valves provide bubble tight sealing to 225 psi (15.5 bar) and are designed to comply with MSS-SP-67 and API-609.

APPLICATIONS

SPECIFICATIONS
VALVE BODY
Service: Compatible liquids, gases, and steam.
Line Size: 2" to 12".
Body Style: 2-way, wafer or lug butterfly.
End Connections: Flange, to be used with flanges that are ANSI Class 125 (B16.1) and ANSI Class 150 (B16.5) dimensions.
Pressure Limit: 225 psi (15.5 bar) WOG.
Wetted Materials: Body: Ductile iron; Disc: 316 SS; Seat and O-ring: EPDM or PTFE; Stem: 410 SS.
Temperature Limits: EPDM Disc: -50 to 250°F (-46 to 121°C); PTFE Disc: 0 to 300°F (-18 to 149°C).
Bearings: Nylatron.
Flow Rate: See Cv chart below
Opeator: 2 to 6": 10-position locking hand lever; 8 to 12": manual gear.

Cv VALUE

	DEGREE OPENING								FULL OPEN
Size	10°	20°	30°	40°	50°	60°	70°	80°	90°
2"	0.1	5	12	24	45	64	90	125	135
2-1/2"	0.2	8	20	37	65	98	144	204	220
3"	0.3	12	22	39	70	116	183	275	302
4"	0.5	17	36	78	139	230	364	546	600
5"	0.8	29	61	133	237	392	620	930	1022
6"	2	45	95	205	366	605	958	1437	1579
8"	3	89	188	408	727	1202	1903	2854	3136
10"	4	151	320	694	1237	2047	3240	4859	5340
12"	5	234	495	1072	1911	3162	5005	7505	8250

Cv is the number of U.S. GPM of 60°F water that will pass through the valve with a 1 PSI pressure drop.

OPERATING TORQUE VALUE (INCH LB)

EPDM Seats	Size (inches)
Service Pressure	2	2-1/2	3	4	5	6	8	10	12
50 psi	86	126	179	295	540	750	1440	2466	3510
100 psi	108	144	195	310	610	780	1490	2910	4100
150 psi	126	150	210	335	699	847	1549	3360	5560
200 psi	150	198	297	400	725	940	1800	3890	7558

PTFE Seats	Size (inches)
Service Pressure	2	2-1/2	3	4	5	6	8	10	12
50 psi	125	130	195	390	650	890	1690	3699	5265
100 psi	130	145	210	430	690	940	1710	4365	6150
150 psi	142	160	248	443	720	974	1770	5040	8340
200 psi	180	220	340	490	795	1020	1890	5835	11367

FEATURES