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McDonnell & Miller 113550 FS1-J Liquid Flow Switch

McDonnell & Miller 113550 FS1-J Liquid Flow Switch

Brand: McDonnell & Miller SKU: 113550
Regular price $332.95 USD
Regular price Sale price $332.95 USD
Sale Out of Stock - Call to Order
Ships Direct from Distribution β€” Dispatches in 24–48 Hrs
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Performance ParameterEngineering Baseline Value
Manufacturer Part Number (MPN)113550
Model DesignationFS1-J

Maintain optimal protection for your hydronic systems with the McDonnell & Miller 113550, also known as the FS1-J flow switch. This critical safety component is designed to actuate a signal in response to fluid flow, helping to prevent equipment damage in heating and cooling circuits by monitoring movement within the piping.

The unit utilizes a precision-engineered paddle mechanism that moves with the velocity of the fluid, mechanically triggering an internal switch when flow conditions deviate from established parameters. This simple yet rugged design ensures consistent response times and long-term durability in demanding HVAC environments.

Key System Performance Baselines:

  • Precision Sensing: Reliable detection of fluid movement to protect critical pumping and heating assets.
  • Rugged Build: Engineered for industrial and commercial longevity in hydronic applications.
  • Seamless Integration: Compact design that allows for straightforward installation in standard piping configurations.

⚠️ Application Profile: Primarily used in commercial chillers, residential boiler systems, liquid transfer lines, and booster pump monitoring to prevent dry-running or flow-loss conditions.

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