McDonnell & Miller FS4-3 Paddle-Type Insertion Flow Switch for Liquids
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 — 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
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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.
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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.