Hedland Flow Meters

Hedland Flow Meters, a division of Badger Meter, manufactures a wide array of variable area flow measurement products for the industrial marketplace. With over 15,000 models to choose from, Hedland provides solutions for air, water, petroleum, oil, phosphate esters, and other water-based fluid applications.

Hedland meters are manufactured in a variety of materials such as aluminum, brass, 303 SS, 316 SS, and polysulfone plastic. Sizes range from 1/2 inch pipe to 3 inch pipe for flow ranges from 0.5 GPM to 400 GPM liquid and 0.5 SCFM to 1000 SCFM air. A variety of flow transmitters and switch options are also available from Hedland for alarm, process control, and data acquisition requirements.

How does the Hedland Variable Area Flow Meter work?


Design of Hedland Flow Meters

The EZ-View® meters unique spring-loaded design installs and operates in any direction. A differential pressure is created by the fluid flowing across the sharp-edged orifice and then acts against the piston pushing it against the spring. Once a constant rate of flow is achieved, the forces on the piston are in balance and the piston achieves a stationary position. Flow Indicator is read through the transparent flow meter body.

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Applications

Hedland® manufactures variable area flow meters for water, water-based fluids, oil, phosphate esters, air, and other compressed gases.Their product offering includes over 10,000 in-line variable area flow meters, designed to monitor oil, phosphate ester, water and water-based emulsions, air and other compressed gases.

Hedland offers flow meters constructed of high-performance materials including: Anodized Aluminum, Brass, and Stainless Steel. The Hedland meters are easy to install, operate in any position (no flow straighteners or special piping needed) and are accurate to ± 2% of full scale.

Aluminum meters are offered as a rugged, low cost flow meter for monitoring non-corrosive water-based or petroleum-based fluids in flow ranges up to 300 GPM (1100 LPM) and pressures up to 3,500 psi (241 bar).

Brass models are recommended for water systems or other applications where galvanic corrosion could become a problem. Brass meters are rated to withstand pressures up to 3,500 psi (241 bar), and are available up to 150 GPM (560 LPM).

For higher pressure systems we recommend our T303 Stainless Steel models, and for corrosive or caustic fluids, we recommend our T316 Stainless Steel meters. These meters can withstand pressures up to 6,000 psi (414 bar) with flow ranges up to 150 GPM (560 LPM).

Using Hedland Meters with other Liquids

The standard flow scale for liquids is calibrated in GPM and LPM at .876 specific gravity for petroleum, 1.18 s.g. for phosphate ester, 1.0 s.g. for water and water-based emulsions, 1.0 s.g. for air and compressed gases. Special scales are also available in other units of measure or specific gravities. The pneumatic meters are offered with a unique multi-pressure flow scale, calibrated to indicate flow rate, in standard cubic feet per minute (SCFM), or liters per second (LPS), at various pressure from 40 to 130 psi (3 to 9 bar)

Correction table and formula for using Hedland Meters with other liquids