FLMG-Series

Supported Applications

The Omega FLMG Series consists of in-line pneumatic flow meters designed for monitoring compressed gas systems. These units provide direct-reading measurements of air flow rates and are suitable for applications requiring rugged construction and easy installation.

• Pneumatic or compressed gas system monitoring
• Air flow rate measurement calibrated at 100 psi (6.8 bar)

Operating Conditions & Performance

The FLMG Series is engineered for pneumatic service with specific performance parameters defined by the series data sheet.

• Measurement Range: Available ranges span from 3 to 12 SCFM (1.5 to 5.5 SLPS) up to 150 to 900 SCFM (75 to 425 SLPS), depending on the model.
• Calibration Conditions: Units are calibrated for Air @ 21°C (70°F), 1.0 sg, and 6.8 bar (100 psig).
• Accuracy: ±4% FS over the entire scale range.
• Repeatability: ±1% FS.
• Operating Temperature: Standard units support up to 240°F (116°C). High-temperature options extend this limit: "-HT" option supports 400°F (204°C), and the "-UHT" option supports 600°F (316°C).
• Pressure Rating: Aluminum and Brass monitors are rated to 600 psig (40 bar); Stainless Steel monitors are rated to 1000 psig (70 bar).

Configuration Options

The series offers extensive configuration options regarding housing materials, process connections, and output signals.

Housing Materials & Wetted Components

• Casing: Aluminum, Brass, or Stainless Steel #304.
• Seals (Wetted):
  • Aluminum/Brass: Buna (standard), EPR, FKM, or Perfluoroelastomer.
  • Stainless Steel: FKM with PTFE backup (standard), Buna, EPR, or Perfluoroelastomer.
• Internal Parts: Stainless steel floating orifice disk and all other internal parts; PTFE-coated Alnico transfer magnet.
• Window Tube (Non-Wetted): Polycarbonate (standard) or Pyrex®.

Process Connections & Dimensions

The series supports port sizes from ¼" to 1½" FNPT. Installation dimensions vary by port size:

• ¼" and ½" Ports: 6⅝" length (A dimension).
• ¾" and 1" Ports: 7⅝" length.
• 1¼" and 1½" Ports: 10¼" length.

Output Signals & Options

Units are available with direct-reading scales or optional electronic outputs powered by 12 to 35 Vdc:

• Analog Output (-MA): Field selectable for 4 to 20 mA, 0 to 5 Vdc (minimum load 100 W), or 0 to 2000 Hz square-wave pulse.
• Relay Options:
  • -R1: Single SPDT relay, rated 10 A @ 220 Vac.
  • -R2: Dual SPDT relays, rated 10 A @ 220 Vac.
• Temperature Options:
  • -HT: High temperatures up to 400°F (204°C).
  • -UHT: Ultra high temperatures up to 600°F (316°C).
• Bidirectional Flow (-BDF): Available for specific sizes; not available with 1½" units or UHT, R1, R2, and MA options.

Key Product Differences

The FLMG Series is distinguished by its spring-and-piston assembly which allows mounting in any position. Model numbers follow the format FLMG---, where material suffixes include AL (Aluminum), BR (Brass), and SS (Stainless Steel). Specific model variants correspond to distinct flow ranges; for example, FLMG-14012 covers 3 to 12 SCFM on a ¼" NPT connection, while FLMG-1141000 covers 150 to 900 SCFM on a 1¼" NPT connection. The "-MA" suffix denotes units equipped with analog output capabilities requiring external power.