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Dwyer Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Stainless Steel, 1 1/2 in NPT - Insertion-Style Hazardous-Location Switches for Liquids
DwyerInsertion-Style Hazardous-Location Switches for Liquids

Dwyer Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Stainless Steel, 1 1/2 in NPT

The Dwyer V4-SS-2-D-U is an insertion-style hazardous-location liquid flow switch with a paddle design, for pipe sizes of 1-1/2 inches. It features a stainless steel body with 1-1/2 inch NPT connections and a DPDT…

SKU 3G-OTH-88400

Also listed as: V4SS2DU · V4 SS 2 D U

Brand
Dwyer
Item
Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Stainless Steel, 1 1/2 in NPT
Category
Insertion-Style Hazardous-Location Switches for Liquids
Available to Order
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Technical specs
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Local availability & support

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
V4-SS-2-D-U
Type
Stainless Steel, NPT, DPDT
NPT
1 1/2 in
For Pipe Size
1-1/2 in
Contact Rating (AC)
10 A @ 125/250V
Contact Rating (DC)
5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @125 VAC
Hazardous Location Rating
Class I, Div 1 and 2, Group A, B, C, D

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

Product Description

The Dwyer V4-SS-2-D-U is an insertion-style hazardous-location liquid flow switch with a paddle design, for pipe sizes of 1-1/2 inches. It features a stainless steel body with 1-1/2 inch NPT connections and a DPDT switch output. The switch is rated for AC contacts at 10 A @ 125/250V and DC contacts at 5 A resistive, 3 A inductive @ 30 VDC, with a mercury-wetted option for 1 A @125 VAC. It carries a hazardous location rating of Class I, Div 1 and 2, Group A, B, C, D.

Frequently Asked Questions

What is the Dwyer V4-SS-2-D-U liquid flow switch used for?

The Dwyer V4-SS-2-D-U is an insertion-style paddle flow switch designed to detect liquid flow or no-flow conditions in piping systems. It is commonly used in industrial process control, HVAC, and water treatment applications, particularly in hazardous locations rated Class I, Div 1 and 2, Groups A, B, C, D.

What are the specifications of the Dwyer V4-SS-2-D-U flow switch?

The Dwyer V4-SS-2-D-U has a stainless steel body with 1-1/2 inch NPT connections for pipe sizes of 1-1/2 inches. It features a DPDT switch output with AC contact rating of 10 A @ 125/250V and DC contact rating of 5 A resistive, 3 A inductive @ 30 VDC. It is rated for hazardous locations Class I, Div 1 and 2, Group A, B, C, D.

Where to buy the Dwyer V4-SS-2-D-U flow switch worldwide?

3G Electric supplies the Dwyer V4-SS-2-D-U flow switch worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this Dwyer model to any country.

How to install the Dwyer V4-SS-2-D-U paddle flow switch?

Install the Dwyer V4-SS-2-D-U by inserting the paddle into a 1-1/2 inch NPT fitting on the pipe, ensuring the paddle is oriented correctly for flow direction. Tighten the connection securely and wire the DPDT switch per the wiring diagram. For hazardous locations, follow local codes and ensure the enclosure is properly sealed.

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 insertion-style hazardous-location switches for liquids. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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