The Hedland flow meter is a variable area instrument. A precision machined, sharp-edged Orifice located within the PistonAssembly, forms an annular opening with the contoured Metering Cone. The Piston Assembly carries a cylindrical PPS/Ceramic Magnet that is magnetically coupled to an external Flow Indicator that moves precisely, in direct response to movement of the Piston. A calibrated Spring opposes flow in the forwarddirection. This spring decreases viscosity sensitivity and allows the flow meter to be used in any position, including inverted.
Bi-directional flow capability: If required, a reverse flow by-passoption is available and is depicted on individual product pages. Note that flow is measured in the forward direction only.
Operates in any position: The Hedland in-line flow meter's uniquespring-loaded variable area design allows meters to be installed in any position without affecting accuracy. An optional inverted flowscale is also available.
Easier to read linear scale: This flow meter is the most readableproduct in its class. Brightly colored indicators move over the graduated, linear Flow Scale which contains bold, easy-to-read numerals and gauge marks. This enhanced resolution virtually eliminates parallax problems associated with competitive, direct reading flow meters.
360° Rotatable guard/scale: Hedland's unique design allows the meter to be installed in any orientation without regard to scale direction. Once the meter is permanently installed, the guard/scale can be rotated 360° to optimize readability.
Rugged construction: Flow meters are available in anodized aluminum, brass, T303 and T316 stainless steel, with SAE, NPTF, BSPP ports. This easy-to-read flow meter is a reliable and trouble-free flow rate indicator, monitoring a variety of liquids and gases (including aggressive chemicals), under a wide range of pressures, temperatures and rigorous conditions encountered in industrial applications.
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