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Dwyer Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 2 in FNPT - Flow Sights with Indicator
DwyerFlow Sights with Indicator

Dwyer Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 2 in FNPT

The DWYER SFI-300SS-2 is a window sight flow indicator with an impeller rotor, designed for gear lube media. It features a 2-inch FNPT connection, a 316 stainless steel wetted body, a tempered glass sight, and a…

SKU 3G-OTH-92625

Also listed as: SFI300SS2 · SFI 300SS 2

Brand
Dwyer
Item
Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 2 in FNPT
Category
Flow Sights with Indicator
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Dwyer
Manufacturer Part Number
SFI-300SS-2
Type
FNPT, Buna-N
FNPT
2 in
Seal Material
Buna-N
Flow Direction
Horizontal Right
For Media Type
Gear Lube
Sight Material
Tempered Glass
Connection Type
FNPT
Stainless Steel
316
Wetted Material
316 Stainless Steel

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

Product Description

The DWYER SFI-300SS-2 is a window sight flow indicator with an impeller rotor, designed for gear lube media. It features a 2-inch FNPT connection, a 316 stainless steel wetted body, a tempered glass sight, and a Buna-N seal. Flow direction is horizontal right.

Frequently Asked Questions

What is the DWYER SFI-300SS-2 sight flow indicator used for?

The DWYER SFI-300SS-2 is used to visually confirm gear lube flow in industrial lubrication systems. Its impeller rotor spins when flow is present, providing a clear indication through the tempered glass sight. It is commonly applied in gearboxes, compressors, and circulating oil systems where reliable flow verification is needed.

What are the specifications of the DWYER SFI-300SS-2?

The DWYER SFI-300SS-2 has a 2-inch FNPT connection, a 316 stainless steel wetted body, a tempered glass sight, and a Buna-N seal. It is designed for gear lube media with horizontal right flow direction. The impeller rotor provides visual flow indication. These specs ensure compatibility with oil lubrication systems.

Where to buy the DWYER SFI-300SS-2 worldwide?

3G Electric supplies the DWYER SFI-300SS-2 sight flow indicator worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source and deliver this genuine Dwyer part to any country.

How to install the DWYER SFI-300SS-2 sight flow indicator?

Install the DWYER SFI-300SS-2 in a horizontal pipe run with flow moving from left to right. Apply thread sealant to the 2-inch FNPT connections and tighten securely. Ensure the tempered glass sight is clean and unobstructed. Verify the impeller rotor spins freely before pressurizing the system with gear lube.

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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Cross-referenced by specification & description
LIQUIDYNAMICS INC. Air Drum Pump: Dolly, 7 gpm Max. Flow Rate, 500 cps Max. Viscosity (MPN 33275-11)
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LIQUIDYNAMICS INC. Electric Drum Pump: 115 V AC, 1 hp HP, 316 Stainless Steel, 30 gpm Max. Flow Rate (MPN 33295P-S4)
LIQUIDYNAMICS INC.
LIQUIDYNAMICS INC. Electric Drum Pump: 115 V AC, 1 hp HP, 316 Stainless Steel, 30 gpm Max. Flow Rate (MPN 33295P-S4)
LIQUIDYNAMICS INC. Air Drum Pump: 3:1, 4 gpm Max. Flow Rate, 14,000 cps Max. Viscosity, Steel (MPN TOB27R50ENQRAFR2)
LIQUIDYNAMICS INC.
LIQUIDYNAMICS INC. Air Drum Pump: 3:1, 4 gpm Max. Flow Rate, 14,000 cps Max. Viscosity, Steel (MPN TOB27R50ENQRAFR2)
LIQUIDYNAMICS INC. Air Drum Pump Kit: 60:1, 48 oz/min Max. Flow Rate, 150°F Max. Fluid Temp., Steel (MPN 13051T-S4H)
LIQUIDYNAMICS INC.
LIQUIDYNAMICS INC. Air Drum Pump Kit: 60:1, 48 oz/min Max. Flow Rate, 150°F Max. Fluid Temp., Steel (MPN 13051T-S4H)
LIQUIDYNAMICS INC. Air Drum Pump: 1:1, 4 gpm Max. Flow Rate, 9,000 cps Max. Viscosity, Steel (MPN 32099-S6)
LIQUIDYNAMICS INC.
LIQUIDYNAMICS INC. Air Drum Pump: 1:1, 4 gpm Max. Flow Rate, 9,000 cps Max. Viscosity, Steel (MPN 32099-S6)

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