Variable Area In-line Liquid Flow Meters

The FLMW and FLMH variable area flowmeters can be installed directly in the fluid line without flow straighteners or special piping. The spring-and-piston type assembly enables these flowmeters to be mounted in any position and protects them against changes in viscosity. Available scaled for water or oil, in Aluminum, Brass or Stainless Steel bodies.

The FLMW or the FMLH Series with the optional analog output (-MA) are typically used to transmit a signal proportional to the flow rate to a process controller, a PLC, a recorder, or a panel-mount display. With the -MA options the user can choose between reading a 0 to 2000 Hz square-wave pulse, a 0 to 5 Vdc analog signal, or a 2-wire 4 to 20 mA analog signal by connecting the appropriate pins.

SPECIFICATIONS
Accuracy: ±2% FS over the entire scale range
Repeatability: ±1%
Flow Measuring Range: 0.4 – 560 lpm (0.1 – 150 gpm)
Maximum Operating Pressure:
   Aluminum and brass monitors: 3500 psig (240 Bar)
   Stainless steel monitors: 6000 psig (410 Bar) up to 116°C (240°F)
Maximum Operating Temperature:
   Standard Models: 116°C (240°F)
   High Temp (-HT) Models: 204°C (400°F) max
   Ultra High Temp (-UHT) Models: 316°C (600°F) max
Pressure Differential: download spec sheet for pressure drop graphs
Standard Calibration Fluids:
   Oil monitors: DTE 25 @ 43°C (110°F), 0.873 sg
   Water monitors: tap water @ 21°C (70°F), 1.0 sg
Maximum Particle Size: 76 microns
Relay (Optional): 1 or 2 form “C” relays, rated 10 A @ 125 or 250 Vac or 0.25 A @ 250 Vdc
Mechanical Life: >10⁷ cycles
Analog Output (Optional): Supply voltage 12 to 35 Vdc, field selectable for 0 to 5 Vdc (100 W minimum load), 0 to 2000 Hz square-wave pulse or 4 to 20 mA; Rmax = 50 (Vs-12). Vs = supply voltage DC
Installation Dimensions:
   1/4 and 1/2 NPT Sizes: 1-7/8 OD x 6.6″ length
   3/4 and 1 NPT Sizes: 2-3/8 OD x 7.2″ length
   1-1/4 and 1-1/2 NPT Sizes: 3-1/2 OD x 10.1″ length

Materials of Construction (Wetted Parts)

Description	Aluminum (Not for Water)	Brass	Stainless Steel
High pressure casing, end ports and tapered shaft	Aluminum	Brass	304 SS
Seals	Buna (std), EPR, FKM or perfluoroelastomer	Buna (std), EPR, FKM or perfluoroelastomer	FKM with PTFE backup (std) Buna, EPR or perfluoroelastomer
Transfer Magnet	PTFE-coated Alnico	PTFE-coated Alnico	PTFE-coated Alnico
Floating Orifice Disk	Stainless Steel	Stainless Steel	Stainless Steel
All Other Internal Parts	Stainless Steel	Stainless Steel	Stainless Steel

Materials of Construction (Non-Wetted Components)

Description	Aluminum	Brass	Stainless Steel
Window Tube	Polycarbonate (std), Pyrex®	Polycarbonate (std), Pyrex®	Polycarbonate (std), Pyrex®
Window Seals	Buna (std)	Buna (std)	Buna (std)

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