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SIL 2 Certified water level controls for boiler drums

The Hydrastep 2468 is the modern day equivalent of the site glass to monitor, display and measure the output level of the water/steam interface. For use on water tube boiler steam drums and de-aerators, the Hydrastep name has become synonymous with steam drum level measurement, and through its evolution has ensured plant safety globally for more than five decades. Assessed by an external body and found to be SIL 2 capable, according to the requirements of IEC 61508. It is recognised by boiler inspectors and plant insurers, the ASME approved design ensures Hydrastep can be used as a Remote Level Indicator in compliance with ASME Boiler Code PG60.1.1. It is also approved by Factory Mutual for boiler level control and recommended within the UK’s Combustion Engineering Association’s water tube boiler guide BG11. All of this expertise is backed up by over 6000 installations of Hydrastep around the globe.

Key Features
• For use with 8 to 32 electrode inputs
• SIL 2 capable for use in a Safety Instrumented Function
• High clarity local and remote displays
• 32 segment green/red display of the water/steam interface level
• 4–20 mA output proportional to water/steam interface level
• Relay output option for high or low level alarms or trips
• Dual redundancy option for ultimate reliability
• Detect and indicate any fault conditions
• Contamination indication for preventative maintenance
• For use to 560 °C (1040 °F) and 300 Bar (4350 PSI)
• PED compliant as a Safety Accessory
• FM approved for boiler control
• Hazardous area approved

Features & Benefits

Failure to detect low water levels in steam raising plant can have costly and potentially disastrous consequences. Fail-safe water level detection is vital to prevent damage to plant and personnel.

Steam boiler water level detection is vital to prevent damage to plant and personnel, Hydrastep’s electronic gauging system is the ideal ‘fit and forget’ solution to overcome the problems associated with unreliable and maintenance-intensive gauge glasses.

Did you know?

An independent report by Factory Mutual Research concluded that the statistical probability of Hydrastep missing a trip condition is less than 1 in 300 million and that nuisance trips will be less than 1 in 10 million.

Mobrey Hydrastep 2468 steam boiler water level monitoring

Fault Tolerant & Fail-Safe Design

  • Electronic gauging system for steam drum water level measurement.
  • Fault tolerant and fail safe – Alarms for low/high water conditions will not trip the boiler on a false alarm.
  • 4-20 mA output proportional to water/steam interface level.
  • High clarity local and remote displays for control room.
  • Electrodes available for up to 560°C (1,040°F) and 300 bar (4,350 PSI).

Features

  • Referenced in the CEA’s BG11: ‘Guidance on Safe Operation of Water Tube Boilers’.
  • Can be used as part of an ASME compliant system.
  • Approved by Factory Mutual for Boiler Water Level Control.
  • Zone 2 hazardous area approval, IP65 enclosure.
  • Upgrade path available for Hydrastep 2457 and 2467 systems.
  • Hydrastep start-up, commissioning and maintenance services available.

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