Description
Xylem-McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch
The McDonnell & Miller FS4-3 (Part Number 114400) is a reliable, general purpose liquid flow switch engineered for a wide range of hydronic and fluid system applications. Designed with a 1″ NPT connection and a Single-Pole Double-Throw (SPDT) switching action, this flow switch provides dependable flow detection and system protection in demanding environments.
Key Features
- 1″ NPT pipe connection for easy installation into standard piping systems
- SPDT (Single-Pole Double-Throw) switch for versatile circuit control
- Rated for up to 160 PSI maximum working pressure
- Includes four stainless steel paddle options: 1″, 2″, 3″, and 6″ lengths for compatibility with various pipe sizes
- Stainless steel paddle construction for corrosion resistance and long service life
- General purpose design suitable for water, hydronic heating, cooling, and other liquid systems
- Part Number: 114400
Application & Benefits
The FS4-3 flow switch is ideal for use in boiler systems, chilled water loops, cooling towers, and other hydronic or process liquid applications where flow verification and equipment protection are critical. The SPDT switching configuration allows the device to be wired for both normally open and normally closed circuit control, providing flexibility for a variety of control strategies. The four included stainless steel paddles allow the technician to select the appropriate paddle length to match the pipe diameter, ensuring accurate and reliable flow detection.
Specifications
- Brand: Xylem-McDonnell & Miller
- Model: FS4-3
- Part Number: 114400
- Connection Size: 1″ NPT
- Switch Type: SPDT (Single-Pole Double-Throw)
- Maximum Working Pressure: 160 PSI
- Paddle Material: Stainless Steel
- Included Paddle Lengths: 1″, 2″, 3″, and 6″
- Application: General Purpose Liquid Flow Detection
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