Over 20% noise reduction for Angola LNG project

Requirement: In February of 2008, Bechtel proceeded with construction of a 5.2 million-metric-ton-per-year liquefied natural gas (LNG) train as part of the Angola LNG project. Control systems on gas compression trains place great demands on valves within the process. Requirements for continual control with the ability to provide full capacity within seconds add to the strain on the valves in the system. Bechtel knew control would be especially critical for the Angola LNG project. They required a special breed of valves that would respond quickly and accurately to control signals to protect plant equipment in a way that would not impact process stability.

Solution: Bechtel turned to CCI to provide over 50 severe service DRAG valves including anti-surge high pressure recycle valves for LNG liquefaction service. The 36”X42” valves had 36” plugs that required a 30” stroke to be actuated in 1.5 seconds. CCI responded to requirements for speed, accuracy and control by utilizing the latest innovation of the Quick Track 30 from STI, a specially designed derivative of their existing intelligent digital valve controller. Quick Track 30 combines microprocessor-based control systems with a valve-positioning device for dependable pneumatic actuator control without the use of boosters. The elimination of mechanical linkages provides for better efficiency, control and faster, more cost efficient installation. All of the valves provided to Bechtel utilize CCI’s revolutionary DRAG technology.