Can I Connect "Two Regulators" in Series on Compressor
Fuel gas drives the boilers, fired heaters, generators, compressors and more in many process manufacturing and product operations. Accurately controlling fuel gas pressure is important for optimum combustion and overall energy efficiency.
I received a draft of an Emerson Exchange Denver conference presentation by Dow's Tony Dafft, Ryan Baker with Emerson local business partner, Puffer-Sweiven, and Emerson's Michael Calaway.
This video of the presentation, Fuel Gas Pressure level Control: Why a Working Monitor Regulator System?, reviews:
…a natural gas letdown awarding to multiple process units and discuss why Dow chose a working monitor regulator setup every bit the new best practise to replace existing separate ranged control valves. This workshop will cover the specific application requirements including noise limitations, turndown requirements, speed of response and leakage concerns. In addition, we will review the different types of monitor setups and benefits of each.
They open sharing some typical fuel gas pressure control applications including fuel gas header, burner gas, airplane pilot gas and minimum burn down. The fuel gas header pressure level controller is used to maintain a abiding fuel gas header pressure throughout the plant or process unit.
Pressure regulators are typically used and typically, pilot operated in lodge to provide a high degree of reliability, speed of response and noise attenuation.
Pressure Regulator Monitor System
A monitor system is any two regulators in series both sensing the same downstream pressure. Upon the failure of one regulator, the other regulator will continue to maintain the downstream pressure level. The presenters describe two types of arrangements:
- Wide-open monitor system
- Working monitor system
The advantages of a wide-open monitor are increased arrangement reliability, simplified testing and overpressure protection by containment. For working monitor systems, the advantages include increased system reliability, both regulators operate, more confidence in monitor takeover, less wear on each regulator, less noise produced due to multiple pressure cuts, and overpressure protection by containment.
Visit the Natural Gas Pressure level Regulation section on Emerson.com for more on working monitor regulation. You can as well connect and interact with other pressure regulator experts in the Valves, Actuators & Regulators group in the Emerson Exchange 365 community.
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Source: https://www.emersonautomationexperts.com/2015/valves-actuators-regulators/working-monitor-pressure-regulators-in-fuel-gas-pressure-control/
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