A Voith control servo motor is a linear electro-hydraulic actuator which operates a valve that controls the mass flow needed to drive machinery. Voith servo motors ensure very precise and high dynamic control of the mass flow.

The control servo motor is an intelligent and compact functional unit consisting of a hydraulic cylinder, control magnet with integral position control, hydraulic pilot valve and position sensor. When a servo motor is used, no additional components such as pilot valve and hydraulic cylinder, for instance, are needed on order to operate the control valves.

A standard 4-20 mA signal specifies the position of the piston rod. The control servo motors are simple and compact in design and ensure consistent and reliable operation. The Mean Time Between Failure (MTBF) for a Voith control servo motor is over 103 years. Your equipment will run for an exceptionally long period of time without unplanned downtime. The control servo motor is also available in a redundant design (position feedback system and way valve control).

Advantages and benefits

-The Mean Time Between Failure (MTBF) is over 103 years. Your equipment operates very reliably. -Productivity increases and the costs associated with lost production remain low

-Simple maintenance that assists in lowering operating costs.Voith control servo motors aren't sensitive to contaminated pilot oil. Turbine lubricating oil is suitable as an operating fluid and one oil supply system for both lubricating and pilot oil suffices

-During load rejection, for instance, the control servo motor reaches the safe position in less than

300 ms. This ensures that your equipment operates with high reliability and availability. After a malfunction, the equipment is ready to operate again in no time

-The high dynamic behavior (response time in the closing direction: < 200 ms) and almost no hysteresis (< 0.01% of maximum stroke) ensures fast and accurate control. You benefit from having a stable process with high product quality

-The integral electronic position control in the Voith servo motor eliminates the need for

time-consuming tuning of controller, position sensor and actuator during test runs and commissioning.

-This results in quicker commissioning and monetary savings

-Design flexibility is assured as we design our servo motors to be compatible with existing equipment. Engineering costs are lowered and the time you need for design is shortened

-For use in hazardous areas, we offer certified explosion-proof control servo motors. The interface to the machine control system is the same for conventional and explosion-proof versions

Typical fields of use

-Control valve actuation of:

--Steam turbines

--Gas turbines

--Compressors

-Retrofit of mechanic-hydraulic valve controls

-Retrofit of hydraulic, electro-mechanical and pneumatic linear actuators

-Upgrade of systems with Voith I/H converters DSG or way valves WSR

-Upgrade of systems with Woodward actuators:

--Varistroke linear electro-hydraulic actuator

--EHPC electrohydraulic power cylinder

--EHPS electrohydraulic power servo

--PGPL hydraulic powered electric actuator

--EG-3P hydraulic amplifier

--TM-25LP or TM-200LP linear proportional actuators

--CPC or CPC-II current to pressure converters

VOITH Control Servo Motor SMR: SMR-A15XXX, SMR-D13XXX, SMR-A11XXX, SMR-A41XXX, DSM-R2/B05249, SMR-A12454, SMR-A12452, SMR-D41101, SMR-D13422, SMR-D13416, SMR-D13415, TCR03100029, TCR41362980, TCR41334130, CTO-B45102,

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