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Steam Turbine Actuators  

Steam valves found on most steam turbines employ hydraulic actuators of the Low Pressure or High Pressure type. One of the key elements in upgrading steam turbine controls is the interface to existing steam valves. We provide complete actuator system designs, compatible with the control system, and turnkey installation.

Generally, our control upgrades interface directly to HP hydraulic systems, with minimal modifications required on servos and position feedback devices. In some cases, existing HP hydraulic systems may be upgraded to improve valve performance.

Pilot actuators
We provide a range of Pilot actuators for interface to existing MHC systems common on older GE and Westinghouse design units.

Hydraulic servomotors
Many European design turbines, including older ABB and Alstom units, employ low pressure hydraulic servomotors for valve controll. We offer a range of I/P (current to pressure) units for control of these type of servomotor systems. This is a relatively inexpensive way to upgrade, since the existing low pressure hydraulic servomotors need not be changed.

HP hydraulic upgrades
HP actuators are now common on most new turbines, and many upgrades involve upgrading to HP actuator systems to provides better valve position dynamics and control accuracy. This involves replacing the existing LP hydraulic actuators and providing a new HP hydraulic actuators and hydraulic power unit (HPU).

Emerson Steam Turbine Actuators Servomotors

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  Emerson Process Management | Power & Water Solutions |
26 Corporate Drive | Clifton Park, NY 12065 USA
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