Description
McDonnell & Miller 114400 FS4-3 – 1" NPT General Purpose Paddle Flow Switch
Reliable Flow Detection for Diverse Industrial and HVAC Applications
The McDonnell & Miller FS4-3 is a versatile 1" NPT paddle-style flow switch designed to control electrically operated equipment such as signal lights, alarms, motors, and automatic burners. Its universal design makes it suitable for a wide range of liquid flow monitoring needs in commercial and industrial systems.
Constructed with durable materials, it features a sealed Monel bellows, hardened stainless steel bearings for low friction, and includes four stainless steel paddles (1", 2", 3", and 6") to fit multiple pipe sizes. Easy sensitivity adjustment and dual electrical knockouts allow flexible installation.
Key Benefits:
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Durable sealed Monel bellows for long-lasting performance
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Four paddle sizes included for multiple applications
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Adjustable sensitivity for precise flow control
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SPDT snap switch for dependable electrical switching
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Compatible replacement for Johnson/Penn, Potter/Taco, Watts, Hydrolevel, and other brands
Applications:
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HVAC systems
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Industrial liquid flow control
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Equipment operation control based on flow
Specifications
| Attribute | Details |
|---|---|
| Part Number | 114400 FS4-3 |
| Product Type | General Purpose Liquid Flow Switch |
| Connection Size | 1" NPT Threaded |
| Switch Type | Single Pole Double Throw (SPDT) |
| Amperage | 7.4A (240V), 3.7A (120V) |
| Voltage | 120V / 240V |
| Frequency | 50 / 60 Hz |
| Max Pressure | 160 PSI (11.3 kg/cm²) |
| Temperature Range | 32°F to 300°F (0°C to 149°C) |
| Material | Sealed Monel Bellows, Stainless Steel Bearings and Paddles |
| Paddle Sizes Included | 1", 2", 3", 6" (25, 50, 80, 150 mm) |
