Isolation valves, Manual butterfly valves, Replacement o-rings – Nor-Cal Butterfly Valves User Manual
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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