Mobrey Float Inquiry

The Mobrey Float is a robust and reliable mechanical level control device used in industrial steam boilers, tanks, and feedwater systems to maintain safe water levels. It works on the simple principle of buoyancy, where a float rises and falls with the liquid level inside the boiler drum or water chamber. The float movement is transmitted through a mechanical linkage or magnetic coupling to operate switches or valves, ensuring automatic control of feedwater supply and protection against low water or high-water conditions.

Mobrey float-operated level controls are widely recognized for their durability, accuracy, and low maintenance, making them ideal for high-pressure boiler applications. They are typically installed in the water column of the boiler and can be configured for on/off control, pump startup/shutdown, alarm signaling, and safety interlock functions.

By preventing conditions such as dry firing (low-water level) or carryover (high-water level), the Mobrey Float ensures safe boiler operation, energy efficiency, and extended equipment life.

⚙️ Technical Highlights

  • Operating Principle: Based on the float displacement principle (Archimedes’ law) – buoyant float rises and falls with water level.
  • Application: Used in steam boilers, feedwater tanks, condensate receivers, and deaerators.
  • Functions:
    • Automatic feedwater pump control
    • Low-water and high-water level alarms
    • Burner cut-off interlock for safety
  • Design:
    • Rugged float chamber with mechanical linkage/magnetic coupling
    • Can be side-mounted or top-mounted depending on boiler design
    • Resistant to high temperature and pressure conditions
  • Operating Pressure: Commonly up to 32 bar (higher ratings available for special models).
  • Operating Temperature: Suitable for saturated steam conditions (up to 250°C approx.).
  • Switching Mechanism: Snap-action microswitches or mercury switches for precise operation.
  • Electrical Ratings: Designed for AC/DC electrical loads for integration with control panels.
  • Maintenance: Simple design ensures easy inspection and replacement without disturbing boiler operation.
  • Certifications: Typically complies with IBR (Indian Boiler Regulation) and other international boiler