Series-NVII

Needle Valves for Precise Flow Control, Hot-Forged Brass Body

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Models In Stock

Pressures to 2000 psi
One piece body construction
Tamper proof design and blowout-proof stem

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Series-NVII

From ^C$ 31.75

Models In Stock

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2 Variations available

See all series options below

Data Sheet

Product Overview

Applications Fluid Measurement and Control, Industrial and Manufacturing
Flow Coefficient 0.31
Materials, Wetted Brass, Fluoroelastomer
Media Compatibility Clean dry air / inert gas, Liquids
Operating Temperature, Max 350 °F
Operating Temperature, Min -40 °F
Port 1 Size 1/4 in
Port 2 Size 1/4 in
Port 2 Type NPT Female
Proof Pressure Up to 2000 psi
Proof Pressure Note 2000 psi (CWP)
Series ID Series-NVII
Weight 0.22 lb

Supported Applications

The Dwyer Series NVII Needle Valves are designed for easy flow regulation, including shut off and throttling functions. These valves serve pressure gages and instruments in applications involving gases and liquids compatible with the specified wetted materials.

Shut off control
Throttling for pressure gages and instruments

Operating Conditions & Performance

The Series NVII operates within a process temperature range of -40 to 350°F (-40 to 176.7°C). A warning in the specifications notes that freezing of the fluid in the installation may severely damage the valve.

Pressure Limit: 2000 psi (138 bar) (CWP)
Flow Coefficient: 0.31
Service: Gases and liquids compatible with wetted materials; not rated for steam use

Configuration Options

The series features a one-piece, hot-forged brass body construction intended to provide maintenance-free service. Design elements include a tamper-proof design and a blowout-proof stem.

Wetted Materials

Valve body: Brass (CW617N)
Retainer, handwheel: Brass (CW614N)
O-ring: Fluoroelastomer

Connections and Dimensions

End Connection Size: 1/4" NPT
Weight: 0.22 lb.

The series supports two distinct connection configurations:

NVII-1B: Needle valve (female x female)
NVII-2B: Needle valve (male x female)

Safety and Compliance

USA: California Proposition 65 warning applies. This product may expose users to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.