Detail ABB IMHSS03 Symphony
The IMHSS03 Hydraulic Servo Module is a valve position control module for the Harmony Symphony DCS platform. It provides an interface through which a processor module can control a hydraulic actuator via a servo valve. By regulating the current to the servo valve, it initiates a change in actuator position. A linear variable differential transformer (LVDT) provides actuator position feedback to the hydraulic servo (HSS) module. Typical uses for the HSS module are positioning of steam turbine throttle and control valves, gas turbine fuel valves, inlet guide vanes and nozzle angle.
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