Nor-Cal Butterfly Valves - Manual (Page 2)

3
Isolation Valves
Ultra-High Vacuum Components Since 1962 • www.n-c.com
2
SECTION 3.6
Manual Butterfly Valves
A
B
C
D
A
B
C
D
Diagram 1 Diagram 2
SPECIFICATIONS
Port ODs: 3 /
4
to 2 inches (19 to 50mm)
Materials
Body: 304 stainless steel
Knob: Aluminum
Port seal: Viton
Actuation: Manual using knurled knob
Maximum temperature with Viton seals
Sustained: <150°C
Intermittent: <204°C
Vacuum range
Viton o-ring: >1x 10 -9 mbar - High vacuum
Our manual butterfly valves provide a low-cost alternative to bellows sealed gate valves. These valves easily actuate from the
fully-closed position to fully open with only a quarter turn of the knob. A patented design allows the sealing disk to center itself when
closing, with even pressure around the Viton O-ring seal. This design also helps to lower the amount of scuffing or rolling of the
o-ring. Quarter-turn actuation, small footprint and the shortest possible gas path make manual butterfly valves the preferred choice
for many applications.
Patented design
All dimensions are in inches (mm) & weights
are in pounds (kg), unless otherwise noted.
MODEL
NUMBER
VALVE
SIZE
O-RING
COMPOUND
BFV-075-95 3 / 4 (19.1) Viton
BFV-100-95 1 (25.4) Viton
BFV-150-95 1 1 / 2 (38.1) Viton
BFV-200-95 2 (50.8) Viton
Replacement O-rings
MODEL
NUMBER DIAGRAM
VALVE
SIZE
FLANGE
TYPE A B C D
BFV-0752-CF 1 3 /
4
(19) 1.33 CF 0.75 (19) 2.01 (51) 0.75 (19) -
BFV-0752-NWB 2 3 /
4
(19) NW 16 0.75 (19) 2.01 (51) 0.75 (19) 1.75 (44)
BFV-1002-CF 1 1 (25) 2.12 CF 1.00 (25) 2.75 (70) 1.00 (25) 1.04 (26)
BFV-1002-NWB 2 1 (25) NW 25 1.00 (25) 2.75 (70) 1.00 (25) 2.00 (50)
BFV-1502-CF 1 1 1 /
2
(38) 2.75 CF 1.25 (32) 3.71 (94) 0.75 (19) 1.34 (34)
BFV-1502-NWB 2 1 1 /
2
(38) NW 40 1.25 (32) 3.71 (94) 1.37 (35) 2.25 (57)
BFV-2002-CF 1 2 (50) 3.38 CF 1.75 (44) 4.90 (124) 1.00 (25) 1.90 (48)
BFV-2002-NWB 2 2 (50) NW 50 1.75 (44) 4.90 (124) 1.00 (25) 2.25 (57)
Manual Butterfly Valves