Series VA Variable Area Glass Flowmeters

Variable Area Glass Flowmeters
65 mm and 150 mm, ±2% FS Accuracy, Interchangeable Flowtubes, PTFE Options

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Series VA Variable Area Glass Flowmeters

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Description

65 mm and 150 mm, ±2% FS Accuracy, Interchangeable Flowtubes, PTFE Options

Accurately measure flow rates of air, water, and other commonly used gases with the SERIES VA Variable Area Glass Flowmeters. Flowmeters are designed with an easy-to-read universal mm scale and supplied with a correlation chart containing calibration data for air and water. Correlation data for other gases and liquids are available. Permanently fused ceramic scale with vertical locator line reduces parallax and eye fatigue. Thick polycarbonate front shield protects tube from breakage and also serves as a magnifying lens to enhance reading resolution.

Glass flowmeters are suitable for metering carrier gases, liquid and gas measurement in pilot plants, laboratories, process flow and level indicating. Units are equipped with a standard 6-turn needle valve for flow rate control. High precision metering valves with non-rising stems (sold separately) are available for high sensitivity control and resolution - particularly suited for very low flow rates.

Flowmeters are shipped completely assembled and ready for panel mounting. Use an optional acrylic tripod base to convert to self-standing bench mounting.

Note: Calibration data is provided in each unit and is unique to each scale.

Specifications

Service:Compatible gases or liquids.
Wetted Materials:Flowtube: Borosilicate glass; Floats: Glass or SS (sapphire, Carboloy and tantalum are optional); Float stops: PTFE; End fittings: Anodized aluminum, 316 SS or brass; Packings: Fluoroelastomer; O-rings: Buna-N on aluminum models and brass models, and fluoroelastomer on SS models, PTFE on VAX5XX models.
Temperature Limits:250°F (121°C); VAX5XX: -15 to 150°F (-26 to 65°C).
Pressure Limits:200 psig (13.8 bar); VAX5XX: 100 psig (6.7 bar).
Accuracy:±2% FS @ 70°F (21.1°C) and 14.7 psia (1 atm absolute); VA1042, VA1243, VA1343, VA25425, VA25025: ±5% FS @ 70°F (21.1°C) and 14.7 psia (1 @ absolute).
Repeatability:±0.25% FS.
Scales:Universal 65 mm or 150 mm with correlation charts.
Turn-Down Ratio:10:1.
Connections:Two 1/8" female NPT.
Mounting:Vertical.
Valve:6-turn needle (standard), optional 16-turn high precision valve.
Valve Orifice:Acetal on aluminum models and brass models, PCTFE on stainless steel models; PTFE on VAX5XX models.

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