Ventilator valves have a big job
A
CCI product story
Edited by the Engineeringtalk editorial team
Dec 16, 2002
Doosan has placed an order with CCI Switzerland for two turbine ventilator valves for the two supercritical 800MW turbines at the coal-fired Yong Hung power plant in Korea.
Doosan has placed an order with CCI Switzerland for two turbine ventilator valves for the two supercritical 800MW turbines at the coal-fired Yong Hung power plant in Korea.
These turbines are among the largest turbines worldwide for supercritical steam conditions.
The valves measure 180 x 250mm with a 130mm seat, and are used to protect the high-pressure turbine from overheating during startup and turbine load rejection.
The valves are hydraulically operated and have a spring to open the valve safely within 1s against the steam pressure, whenever the turbine protection system is sending the trip signal.
The valves have a design pressure of 238bar and a design temperature of 564C.
This will be the first time that CCI has supplied this type of valve for a General Electric licence turbine.
In winning the order, CCI took less than a week from Doosan's enquiry to devise a new design for the valve which was simpler and more cost effective that previously used.
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