The Dwyer Series SFI Midwest Sight Flow Indicators provide an inexpensive, highly reliable visual monitoring solution to safeguard expensive piping systems and industrial equipment. Engineered to give operators immediate verification of fluid movement, direction, and color, these rugged pipeline instruments are available in window-viewing and tube-viewing styles to cover a diverse array of industrial fluid processes. The series offers robust construction with choices of brass, carbon steel, and 316 stainless steel bodies coupled with tempered or borosilicate glass windows to survive harsh industrial environments. Depending on the process visibility requirements, units can be outfitted with high-visibility rotating ABS impellers, mechanical hinged flappers, or empty chambers to monitor both clear and dark liquids. Featuring highly flexible piping connection interfaces—including standard female NPT, BSP Parallel, BSPT threaded, or raised face ANSI flanges—the Dwyer SFI family ensures direct, leak-tight integration into heavy-duty B2B chemical, utility, and manufacturing lines.
Key Product Features
- Diverse Visual Indicators: Configurable with a single window or double window layout utilizing rotating impellers, moving flappers, or clear non-indicator chambers to suit varying fluid opacities.
- Heavy-Duty Pressure Ratings: Built to endure rigorous system stresses, delivering a maximum operating pressure rating of up to 200 psi (13.8 bar) on threaded window units and up to 150 psi (10.3 bar) on flanged configurations.
- High-Temperature Resilience: Formulated with premium tempered glass and specialized gaskets to sustain reliable inline verification at temperatures up to 200°F (93°C) as standard.
- Rugged Material Fortification: Wetted components and industrial bodies are cast from premium 316 Stainless Steel, Carbon Steel, or Brass with optional high-chemical-resistance PTFE gaskets.
- Flexible Piping Integration: Offers ultimate installation freedom through an extensive choice of 1/4″ to 6″ process connection sizes across threaded and raised face flanged specifications.
