Stream-Flo’s Crown Hydraulic Self-Contained, Spring-Fail Closed Emergency Shutdown (ESD) System is used for the automatic closing of gate valves on wellheads and flow lines under emergency conditions. The system consists of a hydraulic actuator, a manual hydraulic pump and control assembly, and a reverse-acting gate valve. The system can be tripped by several means, the most common means by a pressure pilot which trips the system when it senses pressure fluctuations outside of the specified control range. Also remotely by the use of solenoids and position switches
Stream-Flo ESD models can be equipped with single or double-acting hydraulic or pneumatic actuators with manual override and fail-safe closed or open systems.
Stream-Flo’s Crown gate and check valve products feature a full bore/thru-conduit design, in-line reparability and protected long-life seats. The gate valves are designed for all types of applications.