Electronically Controlled Steam Regulators & Valves
The Temperature of Saturated Steam is Directly Related to the Pressure of Saturated Steam
Watch and listen to former sales manager Larry Brown discuss the advantages of using a steam regulator versus a steam valve.
Larry also talks about how he learned about the physics involved and the paradigm shift he went through to understand the benefits and simplicity of saturated steam temperature control using Burling Valve and controlling pressure instead of modulating a valve around an RTD.
The one thing we know about saturated steam is that the temperature is directly related to the pressure. Simply put, if we control the pressure of saturated steam, we control the temperature.
Traditionally, the temperature is controlled with a complicated process valve by modulating the valve open and closed to dance around the desired temperature. This modulation is part of a control scheme incorporating the valve, Resistance Temperature Detector (RTD) and a PID tuning loop. The valve controls the flow and the loop is closed around the RTD.
But, what if you could regulate the pressure of saturated steam electronically without the need for PID tuning?
Control VALVE or REGULATOR
Using a dome-loaded steam REGULATOR and an electronic (or manual) pilot, the temperature of saturated steam is controlled quickly. Reliable & Repeatable.
Advantages of Steam Regulators
Initial & lifetime cost is less than traditional control valves
Easy in-line maintenance requires much less downtime
with electronic control
No PID tuning required. Command to pressure & tempurature is acheived
Quicker to temperature and much more stable during your process
Electrical Control Types and Configurations
up to 400 PSI (28 Bar)
1/2" to 4"
with the option of 6" & 8" Flanges
up to 450°F (232°C)
In Single-Loop configuration, the electronic pilot controls pressure to the dome of the Burling steam regulator. As the diaphragm forces equal out, the pressure in the main line is controlled.
However, the electronic controller does not sense the pressure in the main line and thus cannot adjust to leaks, back pressure and mechanical deficiencies.
Accuracy: ± 2-4% F.S.
With Dual-Loop control, the electronic pilot controls pressure to the dome of the Burling steam regulator. As the diaphragm forces equal out, the pressure in the main line is controlled.
But, instead of sensing pressure in the dome, a 2nd loop is added that senses pressure in the main line and allows the electronic regulator to compensate for leaks, back pressure and any mechanical deficiencies.
Accuracy: ± 0.5% F.S.
Easy In-Line Maintenance
All of the internal components can be easily replaced without removing the valve from the pipeline. This allows for much greater online productivity.
No Disturbing the Pipeline
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