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Dwyer Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 1 1/4 in FNPT - Flow Sights with Indicator
DwyerFlow Sights with Indicator

Dwyer Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 1 1/4 in FNPT

The DWYER Window Sight Flow Indicator with Impeller: Rotor (SKU 21XL80, MPN SFI-300SS-1-1/4) is a flow sight with indicator designed for gear lube media. It features a 1 1/4 in FNPT connection, tempered glass sight…

SKU 3G-OTH-92449

Brand
Dwyer
Item
Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 1 1/4 in FNPT
Category
Flow Sights with Indicator
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Technical Specifications

Dwyer
Manufacturer Part Number
SFI-300SS-1-1/4
Type
FNPT
FNPT
1 1/4 in
Seal Material
Buna-N
Flow Direction
Vertical Down
For Media Type
Gear Lube
Sight Material
Tempered Glass
Connection Type
FNPT
Stainless Steel
316
Wetted Material
Bronze
View Full Spec Sheet

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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The DWYER Window Sight Flow Indicator with Impeller: Rotor (SKU 21XL80, MPN SFI-300SS-1-1/4) is a flow sight with indicator designed for gear lube media. It features a 1 1/4 in FNPT connection, tempered glass sight, Buna-N seal, and bronze wetted material, with a vertical down flow direction.

Frequently Asked Questions

What is the Dwyer SFI-300SS-1-1/4 sight flow indicator used for?

The Dwyer SFI-300SS-1-1/4 is a window sight flow indicator with an impeller rotor, designed to visually confirm gear lube flow in industrial lubrication systems. It is commonly used in pumps, compressors, and gearboxes where reliable flow monitoring is critical.

What are the specifications of the Dwyer SFI-300SS-1-1/4?

The Dwyer SFI-300SS-1-1/4 has a 1 1/4 in FNPT connection, 316 stainless steel body, tempered glass sight, Buna-N seal, and bronze wetted material. It is rated for vertical down flow direction and gear lube media. The manufacturer part number is SFI-300SS-1-1/4.

Where to buy the Dwyer SFI-300SS-1-1/4 worldwide?

3G Electric supplies the Dwyer SFI-300SS-1-1/4 sight flow indicator to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this genuine Dwyer part.

How to install a Dwyer SFI-300SS-1-1/4 sight flow indicator?

Install the Dwyer SFI-300SS-1-1/4 in a vertical pipe run with flow directed downward. Apply thread sealant to the 1 1/4 in FNPT connections and tighten to manufacturer torque specs. Ensure the tempered glass window is not subjected to thermal shock or excessive pressure.

Used in

Common applications for Dwyer
Combustion air-filter monitoring — Magnehelic Series 2000 on burner air-intake filter banks
Clean-room and pharmaceutical pressurisation — Magnehelic / Capsuhelic differential-pressure gauges
HVAC fan-discharge static pressure — Mark II inclined-vertical manometers on AHU test points
Filter-blockage alarms — Photohelic Series 3000 combined gauge/switch on air-handling units
BMS-integrated pressure monitoring — Digihelic DH3 with 4–20 mA output for building management

Dwyer Products

3G Electric supplies Dwyer flow sights with indicator. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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