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Dwyer Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 3/4 in FNPT - Flow Sights with Indicator
DwyerFlow Sights with Indicator

Dwyer Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 3/4 in FNPT

The DWYER Window Sight Flow Indicator with Impeller: Rotor (MPN SFI-300SS-3/4) is a flow sight designed for non-corrosive gases. It features a 316 stainless steel body with 3/4 in FNPT connections, a tempered glass…

SKU 3G-OTH-92256

Also listed as: SFI300SS34 · SFI 300SS 3 4 · SFI-300SS-3-4

Brand
Dwyer
Item
Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 3/4 in FNPT
Category
Flow Sights with Indicator
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Dwyer
Manufacturer Part Number
SFI-300SS-3/4
Type
FNPT
FNPT
3/4 in
Seal Material
Buna-N
Flow Direction
Vertical Up
For Media Type
Non-Corrosive Gases
Sight Material
Tempered Glass
Connection Type
FNPT
Stainless Steel
316
Wetted Material
Tempered Glass

Technical Documents

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

Product Description

The DWYER Window Sight Flow Indicator with Impeller: Rotor (MPN SFI-300SS-3/4) is a flow sight designed for non-corrosive gases. It features a 316 stainless steel body with 3/4 in FNPT connections, a tempered glass sight and wetted material, and a Buna-N seal. The indicator is configured for vertical up flow direction.

Frequently Asked Questions

What is the Dwyer SFI-300SS-3/4 sight flow indicator used for?

The Dwyer SFI-300SS-3/4 is used to visually confirm flow of non-corrosive gases in piping systems. Its impeller rotor spins when flow is present, providing a clear indication through the tempered glass sight. Common in HVAC, process control, and industrial gas lines.

What are the specifications of the Dwyer SFI-300SS-3/4?

The Dwyer SFI-300SS-3/4 has a 316 stainless steel body, 3/4 in FNPT connections, tempered glass sight and wetted material, Buna-N seal, and is rated for vertical up flow direction. It is designed for non-corrosive gases only.

Where to buy the Dwyer SFI-300SS-3/4 worldwide?

3G Electric supplies the Dwyer SFI-300SS-3/4 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 item.

How to install the Dwyer SFI-300SS-3/4 sight flow indicator?

Install the Dwyer SFI-300SS-3/4 in a vertical pipe run with flow moving upward. Apply thread sealant to the 3/4 in FNPT connections and tighten to manufacturer torque specs. Ensure the tempered glass 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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