Nor-Cal Butterfly Valves User Manual
Isolation Valves
Section Three
3.1 General Information
3.2 N-Series Valves
3.3 Poppet Valves
3.4 Ball Valves
3.5 Genesis Valves & Fittings
3.6 Manual Butterfly Valves 2
3.7 Pendulum Valves
3
3.8 Linear Gate Valves
3.9 Bellowless Poppet Valves & Leak Valves
3.10 Isolation Valve Heaters
3.11 Bakeable All Metal Valves
Nor-Cal Products, Inc.
1967 South Oregon Street
Yreka, CA 96097 USA
Tel: 800-824-4166
or 530-842-4457
Main Fax: 530-842-9130
Sales Fax: 530-841-9189
www.n-c.com
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Isolation Valves
Ultra-High Vacuum Components Since 1962 • www.n-c.com
SECTION 3.6
Patented design
Manual Butterfly Valves
Our manual butter fly 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
c
osing, with even pressure around the Viton O -ring seal. This design also helps to lower the amount of scuffing or rolling of the
l
o-ring. Quarter-turn actuation, small footprint and the shortest possible gas path make manual butter fly valves the preferred choice
for many applications.
SPECIFICATIONS
Port OD s:
3/4 to 2 inches (19 to 50mm)
Materials
Body:
304 st ainless steel
Knob: Aluminum
Port seal:
Actuation: M anual using knurled kno b
Maximu m temperatur e with Viton sea ls
Vacuum range
Viton
Sustained:
Intermittent:
Viton o -ring:
<150°C
<204°C
>1x 10
-9
mbar - High vac uum
Manual Butterfly Valves
MODEL
NUMBER
BFV-0752-CF
BFV-0752-NWB
BFV-1002-CF
BFV-1002-NWB
BF V-1502- CF
BFV-1502-NWB
BFV-2002-CF
BFV-2002-NWB
Diagra m 1 Diagra m 2
DIAGRAM
1
2
1 1 (25) 2.12 C F 1.00 (25) 2.75 (7 0) 1.00 (25) 1.0 4 (26)
2 1 (25) NW 2 5 1.00 (25) 2.75 (70) 1.00 (25) 2. 00 (50)
1 1
2 1
1 2 (50) 3.3 8 CF 1.7 5 (44) 4.90 (124) 1.00 (25) 1.9 0 (48)
2 2 (50) NW 5 0 1.7 5 (44) 4.90 (124) 1.00 (25) 2.25 (57)
VALV E
SIZE
3
/4 (19) 1.3 3 CF 0.75 (19) 2.0 1 (51) 0.75 (19) -
3
/4 (19) NW 16 0.75 (19) 2.0 1 (51) 0.75 (19) 1.75 (44)
1
/2 (38) 2.75 C F 1.25 (32) 3.71 (94) 0.75 (19) 1.34 (34)
1
/2 (38) NW 40 1.25 (3 2) 3.71 (94) 1.37 (3 5) 2.25 (57)
A
B
C
D
FLANGE
Replacement O-rings
MODEL
NUMBER
BFV-075-95
BFV-100-95
BF V-150-9 5
BFV-200-95
VALV E
SIZE
3
/4 (19.1) Viton
1 (25.4) Viton
1
/2 (3 8.1) Viton
1
2 (50.8) Viton
O-RING
COMPOUND
TYPE
A
B
A
C
D
C
B
D
All dimensi ons are in inches (mm ) & weights
are in pounds ( kg), unless othe rwise noted.
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