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A trip throttle valve is located at the main steam inlet of the turbine and functions to quickly shut off supply steam when an emergency operating condition occurs. It is an integral part of the rotating equipment protection system.
A trip throttle valve can also be used during start-up to warm high-temperature turbine components, to bring the unit up to minimum governor speed, and to confirm control system operation.
The Gimpel product line includes mechanical latch-type trip throttle valves and hydraulic-operated trip and trip throttle valves.