Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
armstrong
international.com for up-to-date information.
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How the Vortex Mass Flow Meter Operates
Multivariable Options
The AVF and AVI models are available with the following options: V1, volumetric flowmeter; V2, velocity and temperature
sensors; V3, velocity, temperature, and pressure sensors; E1 energy output options; E2, energy options with pressure;
V4, external pressure transmitter input.
Line Size / Process Connections / Materials
The AVF In-line model is built for line sizes ½ through 4 inch wafer or ½ through 8 inch flanged design using ANSI 150,
300, 600, PN16, 40, or 64 class flanges.
The AVI Insertion model can be used in line sizes 2 inch and greater and is built with a compression fitting or packing
gland design using 2 inch NPT, or 2 inch flanged connections (ANSI 150, 300, 600, PN16, 40, or 64 class flanges). The
packing gland design can be ordered with a permanent or removable retractor.
The AVF In-line model can be built with A105 carbon steel, 316L stainless steel, or Hastelloy C-276. The AVI Insertion
model can be built with 316L stainless steel or Hastelloy C-276.
Flow Meter Electronics
Armstrong Vortex Flow Meter electronics are available mounted directly to the flow body, or remotely mounted. The
electronics housing may be used indoors or outdoors, including wet environments. Available input power options are:
DC loop powered (2-wire), DC powered, or AC powered. Three analog output signals are available for your choice of
three of the five process variables: mass flow rate, volumetric flow rate, temperature, pressure or fluid density. A pulse
output signal for remote totalization and MODBUS or HART communications are also available.
Armstrong Vortex Flow Meters include a local 2 x 16 character LCD display housed within the enclosure. Local operation
and reconfiguration is accomplished using six push-buttons operated via finger touch. For hazardous locations, the six
buttons can be operated with the electronics enclosure sealed using a hand-held magnet, thereby not compromising the
integrity of the hazardous location certification.
The electronics include nonvolatile memory that stores all configuration information. The nonvolatile memory allows the
flow meter to function immediately upon power up, or after an interruption in power. All flow meters are calibrated and
configured for the customer’s flow application.
