McDonnell & Miller FS4-3D Insertion-Style Paddle Flow Switch for Liquids
The MCDONNELL & MILLER FS4-3D is a paddle-type flow switch for liquids, designed as an insertion-style switch for 1 in pipe sizes. It features a 1 in NPT connection and an AC contact rating of 22.2 A at 240V (locked…
SKU 3G-OTH-93432
Also listed as: FS43D · FS4 3D
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Product Description
The MCDONNELL & MILLER FS4-3D is a paddle-type flow switch for liquids, designed as an insertion-style switch for 1 in pipe sizes. It features a 1 in NPT connection and an AC contact rating of 22.2 A at 240V (locked rotor). This switch is used to detect liquid flow in industrial piping systems.
Frequently Asked Questions
What is the MCDONNELL & MILLER FS4-3D flow switch used for?
The MCDONNELL & MILLER FS4-3D is a paddle-type flow switch used to detect liquid flow in industrial piping systems. It is commonly applied in HVAC, boiler, and process control applications to ensure flow exists before equipment operation, protecting pumps and heaters from dry-run damage.
What are the specifications of the MCDONNELL & MILLER FS4-3D flow switch?
The MCDONNELL & MILLER FS4-3D is an insertion-style paddle flow switch for 1 in pipe size with a 1 in NPT connection. Its AC contact rating is 22.2 A at 240V (locked rotor). The manufacturer part number is FS4-3D, and it is designed for liquid service in industrial environments.
Where to buy the MCDONNELL & MILLER FS4-3D flow switch worldwide?
3G Electric supplies the MCDONNELL & MILLER FS4-3D flow switch 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 on this paddle-type flow switch.
How to install the MCDONNELL & MILLER FS4-3D flow switch?
Install the MCDONNELL & MILLER FS4-3D by inserting the paddle into a 1 in NPT fitting on the pipe. Ensure flow direction matches the arrow on the switch body. Wire the contacts per the AC rating (22.2 A at 240V locked rotor) and test for proper actuation at desired flow rates.
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3G Electric supplies McDonnell & Miller insertion-style switches for liquids. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.