Precisely Control Vent Steam Using the O₂ Content
 
OXYSTEAM uses OXYTRANS TR to measure the stripped O₂ content of the steam-gas phase in the dome headspace of a thermal feedwater deaerator. The measured value is used for precise control of the vent steam valve.
 
Measuring Principle
 
During thermal deaeration, dissolved oxygen is stripped out using steam. OXYTRANS TR measures the O₂ content of the steam-gas phase. The control system opens the vent valve only for as long as required for deaeration.
 
Applications
 
 
 
Thermal Feedwater Deaerator
 
 
Steam-Gas Phase
 
 
Dome Headspace
 
 
Vent Steam
 
 
Steam Boiler
 
 
Corrosion Protection
 
 
Vent Valve
 
 
Steam Savings
 
 
Calculation example: A boiler capacity of 10 t/h, steam loss of 0,4 % and operation for 8.760 h/year result in steam losses of 350 t; savings are assumed to be 330 t or 13.000 EUR/year at 40 EUR/t.
 
Technical Data
 
Measuring Ranges, Liquid Phase: I) 1 ppb - 2 ppm
II) 30 ppb - 35 ppm
 
Accuracies, Liquid Phase: I) ± 1 ppb
II) ± 30 ppb
 
Measuring Ranges, Gas Phase: I) 0 - 4,2 % O₂
II) 0 - 50 % O₂
 
Accuracies, Gas Phase: I) ± 0,002 % O₂
II) ± 0,03 % O₂
 
Response Time: t90 ≤ 10 s
 
Operating Pressure: max. 12 bar
 
Operating Temperature: Standard -5 to +55 °C (Pt100)
optional: max. +98 °C
+98 to +110 °C: reduced accuracy
 
Material: 1.4404 / AISI 316L, silicone (FDA), PTFE (FDA)
 
Input: 1 x analog (4 - 20 mA) & 3 x digital (24 VDC)
 
Output / Fieldbus: 2 x analog (4 - 20 mA) & 3 x digital (24 VDC)
optional: PROFIBUS DP & PROFINET
 
Enclosure Rating / Supply: IP65 / 24 VDC
 
Optical Technology: No replacement of electrolyte or membrane.
 
Short Response Time: t90 ≤ 10 s and high long-term stability.
 
High Temperatures: Suitable for applications at high temperatures.
 
Modular Design & Extensions
 
OXYTRANS TR – O₂ Measurement (Optical; In-line)
 
Sensors & Measurement Technology