McDonnell & Miller FS7-4S Paddle-Type Insertion Flow Switch for Liquids
The MCDONNELL & MILLER FS7-4S is a paddle-type insertion-style flow switch for liquids, designed for pipe sizes from 1-1/4 in to 16 in. It features a brass body with a 1-1/4 in NPT connection and an SPDT switch. The…
SKU 3G-OTH-93898
Also listed as: FS74S · FS7 4S
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Product Description
The MCDONNELL & MILLER FS7-4S is a paddle-type insertion-style flow switch for liquids, designed for pipe sizes from 1-1/4 in to 16 in. It features a brass body with a 1-1/4 in NPT connection and an SPDT switch. The contact rating is 22.2 A at 240V (locked rotor).
Frequently Asked Questions
What is the McDonnell & Miller FS7-4S flow switch used for?
The McDonnell & Miller FS7-4S is a paddle-type insertion flow switch for liquids. It detects flow or no-flow conditions in pipes from 1-1/4 in to 16 in, commonly used in HVAC, boiler, and industrial water systems to protect pumps and equipment.
What are the specifications of the McDonnell & Miller FS7-4S?
The FS7-4S has a brass body with a 1-1/4 in NPT connection and an SPDT switch. It handles pipe sizes from 1-1/4 in to 16 in. Its AC contact rating is 22.2 A at 240V (locked rotor). The manufacturer part number is FS7-4S.
Where to buy the McDonnell & Miller FS7-4S worldwide?
3G Electric supplies the McDonnell & Miller FS7-4S flow switch worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.
How to install the McDonnell & Miller FS7-4S flow switch?
Install the FS7-4S by inserting the paddle into the pipe through a 1-1/4 in NPT fitting. Ensure the flow direction arrow on the body aligns with actual flow. Wire the SPDT switch per your control circuit. Always follow local codes and the manufacturer's manual.
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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.