CONTROL AND DRIVES ARE:
Voith Tandem Way Valve:
A tandem way valve is a way valve with two control magnets. These control magnets are connected in series and form a redundant unit (cold redundancy). If one control magnet malfunctions, the other takes over the control task. The switching logic is located in the distributed control system (DCS) and monitors the control magnets.
Voith Way Valve Module:
A way valve module is a completely redundant system with two way valves connected in parallel (hot redundancy). Electronic fault detection is integrated. A hydraulic Max. Module ensures functionality.
Voith I/H Converters:
An I/H Converter is a current-to-pressure converter. It regulates the pilot valve of a hydraulic cylinder that actuates the control valve. The hydraulic pressure p is the control variable. The position of the piston rod is generally fed back mechanically to the pilot valve. This is a simple, reliable and cost-effective solution.
Voith I/H Converter Module:
An I/H converter module is a completely redundant system with two I/H converters connected in parallel (hot redundancy). Electronic fault detection is integrated. A hydraulic Max. Module ensures functionality.
Voith Way Valves:
A way valve is a servo valve with an integrated position controller. The way valve directly regulates the hydraulic cylinder that actuates the control valve. The control variable is the stroke s of the piston rod. The position of the rod is feed back electrically to the integrated position controller. 3/3 and 4/3- way valve options are available for single-acting and double acting cylinders. This solution for directly controlling hydraulic cylinders is reliable and has a good price/performance ratio.
Woodward CPC-II Current to Pressure Converter:
The CPC-II (current to pressure converter, generation II) is an electrohydraulic pressure regulating valve control used in positioning single-acting steam turbine valve servos. Its superb accuracy and resolution make it ideal for steam turbine valve control and related turbine speed and load control. It accepts a 4–20 mA pressure demand signal and accurately controls oil pressure to precisely position single-acting steam turbine governor valves.
Woodward SPC Servo Position Controller:
The SPC Servo Position Controller is a servo-valve driver that accepts either a DeviceNet or 4–20 mA based position demand signal from a system controller. It accurately positions proportional or integrating servo valves. The SPC has the accuracy, responsiveness, and redundancy required for steam and gas turbine fuel valve control.
