Instead, the system utilizes its own clean, contaminant-free, closed-loop hydraulics to power and control the actuation component. The system is self-contained and requires no flow line pressure, compressed air, gases or electricity for power. The system consists of a hydraulic actuator, a manual hydraulic pump and control assembly, a reverse-acting gate valve, and some form of tripping control(s). Stream-Flo’s Crown self-contained hydraulic valve actuation systems are used for the automatic closing of gate valves on wellheads and flow lines under emergency conditions, such as emergency shutdown systems and surface safety valves.
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