Dwyer Instruments SFI-100-1 Indicator

The Dwyer Instruments SFI-100-1 Indicator is a field-proven sight flow indicator designed for immediate visual verification of fluid movement within 1" piping systems. Built with a rugged bronze body and a single tempered glass window, this unit is engineered to withstand demanding mechanical environments. It features a bright red ABS impeller that provides high-visibility rotation, allowing contractors to diagnose flow status for both compatible gases and liquids at a glance. With a 1" NPT threaded connection, the SFI-100-1 integrates seamlessly into existing hydraulic lines, coolant tanks, and pressure vessels. This model supports a maximum operating pressure of 125 psig and a temperature limit of 200°F (93°C), making it a staple for industrial HVACR monitoring and process control. The inclusion of Buna-N gaskets ensures a reliable seal, while the removable window design allows for straightforward maintenance and replacement of internal wearing parts without replacing the entire housing.

• Visual Flow Confirmation: The rotating ABS impeller offers a clear, mechanical indication of flow velocity and direction in opaque or clear media.
• Durable Construction: High-grade bronze body resists industrial wear, while the tempered glass window provides safety and clarity under pressure.
• Versatile Mounting: This 1 inch flow indicator can be installed in either horizontal or vertical orientations to suit specific piping layouts.
• Maintenance Friendly: Features a removable window assembly, facilitating easy cleaning and gasket replacement to extend service life in the field.
• Broad Media Compatibility: Suitable for monitoring water, oils, and compatible gases within a 200 degree temperature limit.

Can the SFI-100-1 be used with steam?
No, this model is rated for a maximum temperature of 200°F and uses Buna-N seals; it is not recommended for high-temperature steam applications. For higher thermal requirements, contact our team regarding fluoroelastomer or PTFE seal options.

Does the impeller work in low-flow conditions?
The ABS impeller requires a minimum velocity to initiate rotation. In very low-flow scenarios, the rotor may stay stationary, though fluid presence is still visible through the single window.

Is the window replaceable if it becomes etched or clouded?
Yes, the tempered glass window and internal gaskets are removable, allowing for field service and parts replacement if visibility is compromised by debris or corrosive media.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.