Boiler Tubular Type Water Level gauge Inquiry

A Tubular Water Level Gauge is a reliable, transparent glass tube type instrument designed for continuously monitoring the liquid level in boilers, heaters, and pressure vessels. It provides a direct and accurate indication of the water level inside the boiler drum or tank, ensuring safe and efficient operation of the equipment.

The gauge consists of a toughened borosilicate glass tube mounted between two isolation valves (often provided with safety ball check arrangement). The water level in the boiler is directly visible in the tube, giving operators a quick visual confirmation of the liquid level without any complex instruments. These gauges are simple in design, cost-effective, and easy to install and maintain.

They are widely used in small to medium-capacity boilers, heaters, and storage tanks, where accurate level monitoring is critical for safe working and prevention of hazards like overheating, dry run, or pressure build-up.

Technical Highlights

  • Construction:
    • Made of heavy-duty borosilicate glass tube resistant to thermal shock and pressure.
    • Mounted between bronze / forged brass / gunmetal / stainless steel valves for durability.
    • End connections: Screwed or flanged (as per requirement).
  • Valves & Safety Features:
    • Fitted with isolation valves at both ends for easy maintenance and glass tube replacement.
    • Ball check valve arrangement ensures automatic shut-off in case of tube breakage, preventing water or steam leakage.
    • Drain cock provided for flushing and maintenance.
  • Operating Parameters:
    • Pressure Rating: Typically up to 10–15 kg/cm² (higher ranges available on request).
    • Temperature Rating: Suitable for temperatures up to 200°C.
    • Length: Available in standard and customized lengths to suit boiler design.
  • Visibility:
    • Provides direct water level indication without need of complex instrumentation.
    • Clear visibility of liquid level under varying light conditions.
  • Applications:
    • Widely used in steam boilers, hot water boilers, thermic fluid heaters, process heaters, and small industrial tanks.
  • Advantages:
    • Economical and easy to install.
    • Requires minimal maintenance.
    • Provides instant visual confirmation of water level.
    • Increases safety of boiler/heater operation by preventing dry run and overheating.