Dwyer Instruments NVII Catalog Page
L
[44.45 OPEN]
[41.67]
Ø63/64
Ø63/64
Flow Coefficient at Turns Open
Cv USGPM @ 1 psi
Turns Open
MODEL NVII | W.E. ANDERSON™ BY DWYER
NEEDLE VALVES
Economical, Pressures Up to 2000 psi, Blowout-Proof Stem
The Model NVII Needle Valves provide easy ow regulation in all applications,
including shut off and throttling for pressure gages and instruments. With a one
piece, hot forged brass body construction, years of maintenance-free service can
be expected. The Model NVII, with its tamper-proof design and blowout-proof stem,
provides excellent performance and reliability.
FEATURES/BENEFITS
• Pressures to 2000 psi
• One piece body construction
• Tamper proof design and blowout-proof stem
NVII-1B
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
Turns
1/2
1
1-1/2 2
[Ø25.00]
1-3/4 OPEN
1-41/64 CLOSED
[41.67 CLOSED]
Ø23/32
[Ø18.26]
1-41/64
NVII-2B NVII-1B NVII-2B
SPECIFICATIONS
Service: Gases and liquids compatible with wetted materials. Not rated for steam
use.
End Connection Size: 1/4˝ NPT.
Pressure Limit: 2000 psi (138 bar) (CWP).
APPLICATIONS
• Instrument line shut off, instrument
isolation, drain valve, and pressure
gages
NVII
2-1/2
3
Others
Wetted Materials: Valve body: Brass (CW617N); Retainer, handwheel: Brass
(CW614N); O-ring: Fluoroelastomer.
Temperature Limits: -40 to 350°F (-40 to 176.7°C). (Warning: freezing of the uid
in the installation may severely damage the valve.)
Flow Coefcient: 0.31.
Weight: 0.22 lb.
MODEL CHART
Model Description
NVII-1B
NVII-2B
USA: California Proposition 65
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
1/4 - 18 NPT
33/64 TYP
[13.10 TYP]
Needle valve (female x female)
Needle valve (male x female)
1/4 - 18 NPT
33/64 TYP
[13.10 TYP]
[Ø25.00]
DWYER INSTRUMENTS, INC. |
1-41/64 CLOSED
1/4-18 NPT
1-23/32
[43.66]
[41.67 CLOSED]
Ø23/32
[Ø18.26]
1-3/4 OPEN
[44.45 OPEN]
Valves,
Needle
431
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