Dwyer SFI-300-1 Double Window Bronze Sight Flow Indicator 1" NPT

The Dwyer SFI-300-1 is a 1" NPT double-window bronze sight flow indicator designed for visual monitoring of fluid or gas flow in pipelines. Featuring a rotating ABS impeller visible through two tempered glass viewing windows, this unit allows operators to confirm both the presence and direction of flow at a glance.

Built with a durable bronze body and safety-tested components, the SFI-300-1 delivers long-term, dependable performance at an economical price point. The unit can be installed horizontally or vertically and is suitable for use with compatible liquids and gases.

Key Specifications:

• Connection Size: 1" NPTF threaded process connections
• Body Material: Bronze
• Window: Dual tempered glass (double window)
• Flow Indicator: Rotating ABS impeller
• Pressure Rating: 125 PSIG (standard)
• Temperature Range: 32°F to 200°F (0°C to 93°C)
• Flow Range: 5 FPS (liquids) / 5,000 FPM (gases)
• Gasket Options: Buna-N, fluoroelastomer, or PTFE
• Mounting: Horizontal or vertical installation

Key Features:

• Double viewing windows provide clear, unobstructed observation of flow from multiple angles
• Removable window design simplifies field service and replacement of wearing parts
• Rotating impeller confirms flow direction and rate of movement
• Safety-tested construction ensures reliable service in demanding process environments
• Compatible with a wide range of liquids and gases

The Dwyer Series SFI-300 sight flow indicator is a proven solution for process monitoring in HVAC, industrial fluid systems, hydraulic lines, coolant loops, and oil reservoirs. Also marketed under the W.E. Anderson brand name.