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GESTRA LRGS 15-1 SURFACE BLUFF
GESTRA LRGS 15-1 SURFACE BLUFF

GESTRA LRGS 15-1 SURFACE BLUFF

GESTRA LRGS 15-1 surface blowdown electrode is specifically used to monitor and control the quality of boiler water in steam boilers. By maintaining the concentration of minerals and salts (conductivity/TDS) in the boiler water at an optimal level, it prevents corrosion, scale formation, and foaming. This increases boiler efficiency, reduces the risk of breakdowns, and ensures safe operation.

Primary areas of application include:

  • Steam Boilers and Evaporators: Continuously measures the total dissolved solids (TDS) content of the boiler water to provide a signal for automatic surface blowdown control.
  • Automatic Boiler Blowdown Systems: Works in conjunction with automatic blowdown valves such as GESTRA's BAE series continuous blowdown valves or other compatible solenoid valves.
  • Energy Efficiency and Water Saving: Minimizes water and energy losses by ensuring that boiler blowdown occurs only when necessary. Excessive blowdown leads to unnecessary energy and water loss, while insufficient blowdown causes scaling and corrosion. The LRGS 15-1 helps maintain this balance.
  • Unattended Boiler Operation: Ideal for boiler operations that do not require continuous supervision according to standards like TRD 604, as it offers automatic and reliable control.
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GESTRA LRGS 15-1 is a conductivity switch with a compact design. It consists of a conductivity measuring electrode and a switching device integrated into the electrode's terminal box. The electrode measures the electrical conductivity in the boiler water based on the conductometric measuring principle. This conductivity value is an indicator of the total salt content (TDS) of the boiler water.

When the measured conductivity reaches or exceeds a pre-set limit value, the LRGS 15-1 sends a signal via a potential-free relay contact. This signal typically causes an automatic blowdown valve (e.g., GESTRA BAE 46) to open and discharge boiler water. When the conductivity falls to the desired level, the valve closes. The LRGS 15-1 features temperature compensation to ensure that temperature changes do not affect the conductivity measurement. The electrode, made of corrosion-resistant stainless steel, ensures long-lasting and reliable operation. It offers a simple and effective solution for facilities without a PLC control panel.

  • Model: LRGS 15-1
  • Type: Conductivity Switch / Surface Blowdown Control Electrode
  • Measuring Principle: Conductometric measurement
  • Measuring Range: Typically 100 – 10000 µS/cm (at 25 °C), with some variants also available for 50 – 5000 ppm (at 25 °C).
  • Nominal Pressure (PN): 25 bar (at temperatures up to 224°C)
  • Mechanical Connection: Typically G ¾" screwed (ISO 228-1) or NPT ¾" screwed (optional).
  • Body/Electrode Material: Stainless steel (e.g., 1.4571 / X6CrNiMoTi17-12-2)
  • Power Supply: Typically 115/230 VAC, 50/60 Hz.
  • Output: Potential-free relay contacts (e.g., 4 contacts) to control the automatic blowdown valve.
  • Temperature Compensation: Integrated temperature compensation to make conductivity measurement independent of temperature changes.
  • Ambient Temperature: -10 °C to +70 °C during operation.
  • Protection Class: IP 65 (according to EN 60529), NEMA type 4 (according to NEMA 250).
  • Features: Compact design, easy installation, maintenance-free operation (no moving parts), high reliability, automatic shut-off function (when boiler is switched off), integrated test functions.