MCDONNELL & MILLER Flow Switch: Paddle, 1 in For Pipe Size, 1 in NPT, 1 in Connection Size
The MCDONNELL & MILLER FS4-3 is a paddle-type insertion-style flow switch for liquids, designed for 1-inch pipe sizes with a 1-inch NPT connection. It features a contact rating of 44.4 A at 120V (locked rotor) for AC…
SKU 3G-OTH-93463
Also listed as: FS43 · FS4 3
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.
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Product Description
The MCDONNELL & MILLER FS4-3 is a paddle-type insertion-style flow switch for liquids, designed for 1-inch pipe sizes with a 1-inch NPT connection. It features a contact rating of 44.4 A at 120V (locked rotor) for AC applications.
Frequently Asked Questions
What is the MCDONNELL & MILLER FS4-3 flow switch used for?
The MCDONNELL & MILLER FS4-3 is a paddle-type insertion-style flow switch for liquids. It detects flow or no-flow conditions in 1-inch pipes, commonly used in HVAC, boiler, and industrial water systems to protect pumps and equipment.
What are the specifications of the MCDONNELL & MILLER FS4-3?
The FS4-3 is a paddle flow switch for 1-inch pipe size with a 1-inch NPT connection. Its AC contact rating is 44.4 A at 120V (locked rotor). The manufacturer part number is FS4-3, and it is designed for liquid applications.
Where to buy the MCDONNELL & MILLER FS4-3 worldwide?
3G Electric supplies the MCDONNELL & MILLER FS4-3 flow switch worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.
How to install the MCDONNELL & MILLER FS4-3 flow switch?
Install the FS4-3 in a horizontal pipe section with the paddle oriented correctly for flow direction. Ensure the 1-inch NPT connection is sealed properly. Follow standard electrical safety practices for the 120V AC circuit. Consult the manufacturer's manual for torque and wiring details.
Used in
Common applications for McDonnell & MillerMcDonnell & Miller Products
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.
