Engine: Steam Plants

1. A A servomotor, mechanically connected to nozzle valve hand wheels, opens or closes the valves in accordance with the type of electrical signal received.
2. B A lifting beam mechanism engages nozzle valve stems of varying lengths.
3. C A hydraulic piston raises or lowers individual valves according to pressure received from a governor.
4. D A hydraulic piston raises or lowers groups of valves according to pressure received from a governor.

Tip: press A-D to answer