voith.com

Actuators and control systems
for turbomachinery

Products, services and engineering

General information about Voith
The Voith Group is a global technology company. With its broad
portfolio of systems, products, services and digital applications,
Voith sets standards in the markets of energy, oil & gas, paper,raw materials and transport & automotive. Founded in 1867, thecompany today has more than 20 000 employees, sales of Euro
4.2 billion and locations in over 60 countries worldwide and isthus one of the larger family-owned companies in Europe.
You benefit from the experience we have accumulated inturbomachinery for the last 40 years. Globally, 1 200 customers
place their trust in this. More than 30 000 steam turbines using
our actuators and control systems are driving generators,compressors and other driven machines. In addition, there are
950 gas turbines equipped with Voith valve assemblies.

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Produce safelyand efficiently.
Product portfolio
Gas turbines, steam turbines and compressors achieve
exceptional efficiency and operational reliability when using
actuators, protection equipment and control systems from Voith.
With our products, virtually all turbine and compressor control
systems can be achieved – from simple, non-redundant systems
to redundant ones with high availability.

Products for turbomachinery controls

Control actuators

Safety actuators

Controllers / Governors

I/H converters

Trip blocks

Standard controllers

Way valves

Trip actuators

Customized controllers

Servo motors

Overspeed protection

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Actuators
No matter what type of valve actuation you may be planning,
we have a cost-efficient and functional solution. That applies bothto new systems and to the modernization of existing systems.
We design the actuator solutions in line with your requirements for safety and availability. For example, we offer redundant products for high-availability process units or certified
products for potentially explosive atmospheres. In addition,
most of our actuators are SIL certified and thus comply with
the international standard for operational safety.

Advantages and benefits+ Our actuators reduce the complexity of your overall
control system+ The result is increased reliability and availabilityof your plant+ This helps you to run a trouble-free and profitable
operation+ The outstanding control speed and precisionof the actuators provide stable processes thatensure high quality for your products

Three different product groups for actuating control valves

ProductI/H converters

Way valvesServo motors

Current-to-pressure
converter

Servo valve withposition controller

Linear actuator

Pilot valve
Function

Valve actuation

Hydraulic cylinder

Hydraulic cylinder

Control valve

Control valve

Control valve

ComplexLess complex

SimpleVoith product
Provided by the customer

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I/H converters and I/H converter modules

I/H converter
An I/H converter is a current-to-pressure converter. It r­ egulates
the pilot valve of a hydraulic cylinder that actuates the controlvalve. The hydraulic pressure p is the control variable. The position of the piston rod is generally fed back mechanically to thepilot valve. This is a simple, reliable and cost-effective solution.

Advantages and benefits+ High productivity from high reliability;
MTBF = 600 years+ Stable processes thanks to first-class control
characteristics+ Less sensitive to contaminated pilot oil

I/H converter module
An I/H converter module is a completely redundant systemwith two I/H converters connected in parallel (hot redundancy).
Electronic fault detection is integrated. In the event of a I/H
con­verter failing, the function is ensured by a hydraulicmaximum selection.

Advantages and benefits+ Very well suited to high-availability systems;
MTBF = 20 000 years+ An I/H converter can be replaced during operation+ Simple upgrade from non-redundant systems

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Way valves and way valve modules

Way valve

A way valve is a servo valve with an integrated position controller.
The way valve directly regulates the hydraulic cylinder thatactuates the control valve. The control variable is the stroke s ofthe piston rod. The position of the rod is fed back electrically tothe integrated position controller. 3/3 and 4/3 way valve options
are available for single-acting and double-acting cylinders. Thissolution for directly controlling hydraulic cylinders is reliable andhas a good price/performance ratio.

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Advantages and benefits+ High productivity from high reliability;
MTBF = 180 years+ Very good process quality due to excellent control
speed and precise positioning+ Less sensitive to contaminated pilot oilTandem way valve

A tandem way valve is a way valve with two control magnets.
These control magnets are connected in series and form aredundant unit (warm redundancy). If one control magnet
malfunctions, the other takes over the control task. Theswitching logic is located in the distributed control system(DCS) and monitors the control magnets.

7Advantages and benefits+ High productivity from very high reliability;
MTBF = 360 years+ Higher operational reliability due to two control
magnets connected in series+ Very simple upgrade from non-redundant systems

Way valve module

A way valve module is a completely redundant system with twoway valves connected in parallel (hot redundancy). Electronic
fault detection is integrated. A hydraulic Max. Module ensures
functionality.

8Advantages and benefits+ Very well suited to high-availability systems;
MTBF = 8 800 years+ A way valve can be replaced during operation+ Simple upgrade from non-redundant systems

Servo motors

Control servo motor

A control servo motor is a linear, electrohydraulic actuator.
It is mounted to the control valve and actuates it directly.
The control variable is the stroke s of the piston rod. The rod
position feedback is integrated into the servo motor. Control
servo motors are available with single-acting or doubleacting cylinders. Various components of the servo motors
may have redundant design.

9Advantages and benefits+ Complete, cost-optimized drive solution witha high force density+ Drive with only a few interfaces+ Simple system integration and quick commissioning;
also ideal for retrofitting+ Very quick, precise and stable control using matchedcomponents+ Less sensitive to contaminated pilot oil+ Integrated fail-safe function

SelCon self-contained linear actuator

A SelCon self-contained actuator is a linear, electrohydraulicdrive without external oil supply. It is mounted to the control
valve and actuates it directly. The control variable is the strokes of the piston rod. The rod position feedback is integrated
into the drive. The self-contained hydraulic system is also
integrated into the drive.

10Advantages and benefits+ Compact, cost-effective drive solution witha high force density+ Only electrical interfaces present+ Simple system integration and quick commissioning;
also ideal for retrofitting+ Very good dynamics and control loop performancewith position control via a servo pump
+ Integrated fail-safe function

EMA electromechanical actuator

The EMA electromechanical actuator is a linear and oil-freeactuator. It is mounted to the control valve and actuates it
directly. The control variable is the stroke s of the actuatorspindle. The spindle position feedback is integrated into thedrive.

Advantages and benefits+ Compact, cost-effective drive solution witha medium force density+ Only electrical interfaces present+ Simple system integration and quick commissioning;
also ideal for retrofitting+ Very quick, precise and stable control+ No costs for oil management+ Integrated fail-safe function

11Safety
Avoiding overspeed is the primary task for the protection
equipment of turbomachinery. For these protection systems,
we offer a range of actuators to increase the operationalreliability of your plant.
The design of the products is compact and modular. This
allows nearly all standard safety concepts for turbine control
systems to be implemented in a cost-effective way. As anoption, the products are available in explosion-proof design.

Advantages and benefits+ In the event of a trip, your turbine safely shuts down
via our actuators in the shortest possible time
+ You avoid immediate and consequential damage
resulting from turbine overspeed

Three product groups for actuating trip valves

ProductFunction

Trip block

Trip actuator

Overspeed protection

Electrohydraulicsafety control unit

On/off actuator

Overspeed detection
and tripping

Hydraulic cylinder(direct mounting)

Hydraulic cylinder

Trip valve

Trip valve

Trip valve

Voith product
Provided by the customer

12Actuators for protection systems

Trip blocks

A trip block is an electrohydraulic safety control unit. It directly
regulates the hydraulic cylinder that actuates the trip valve.
The structure is triple modular redundant with a 2-out-of-3
voting (2oo3). A high flow rate allows very short trip times. All
the solenoid valves can be isolated from the hydraulic system.

Advantages and benefits+ Very well suited to high-availability systems;
MTBF = 100 000 years+ Excellent safety and availability through triple modular
redundancy and 2-out-of-3 voting (2oo3)+ Less sensitive to contaminated pilot oil+ Diagnostics for the trip valve using a partial-stroke
testing function

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Trip actuators

A trip actuator is a linear on/off actuator, which is mounted tothe trip valve and actuates it directly. The drive solution iscompact and forms a complete unit. We offer three different
trip actuators: electrohydraulic, self-contained electrohydraulicand electromechanical drives.

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Advantages and benefits+ Simple system integration and quick commissioning;
also ideal for retrofitting+ Diagnostics for the trip valve using a partial-stroke
testing function+ Integrated fail-safe function

CTo overspeed protection system

A CTo detects overspeed and directly controls the hydrauliccylinder that actuates the trip valve. The assembly is compact
and has short signal paths. It is usually mounted directly on
the hydraulic cylinder for the trip valve.

Advantages and benefits+ High productivity from high reliability;
MTBF = 200 years+ Overspeed detection and trip function contained in
one device on site
+ Diagnostics for the trip valve using a partial-stroke
testing function+ Integrated fail-safe function

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Controllers
Voith control systems are suitable for all steam turbines
used to drive generators, compressors, pumps and othermechanically driven machines.
The control systems are available in two designs:
1.	Standard controllers that are “pre-engineered” withstandard software
2. 	Customized controllers with adapted software, widelydiffering functionality and optional redundancy

Advantages and benefits+ Your turbine or compressor operates safely, reliably
and efficiently with our controllers+ You ensure the productivity of your plant and thequality of the produced products+ Your turbine or compressor operates very efficiently
with proven and multiple tested software algorithms.
Our engineers are continually refining these algorithms
and adapting them to the current state of the art

1 TurCon DTc in quality control
2 TurCon DTe-R2 final test
3 TurCon DTm in service

1162317

Control systems

TurCon DTm/DTc standard controllers

Standard controllers have a modular design with industryproven hardware. The software is “pre-engineered” and theoperation of the user interface is intuitive. After connection andconfiguration, the standard controllers are ready for operation.
Integration into a distributed control system (DCS) is easy withvarious communication interfaces. A 7” TFT LCD control panel
with touchscreen interface is used for operation.

18Advantages and benefits+ Very flexible controller – suited to steam turbines ofall power classes+ Simple, fast and cost-effective system integration;ideal for new plants and for retrofitting+ Convenient and modern HMI

TurCon DTe-R2-CC customized controller

Customized controllers are designed with standard industrialproven hardware. The hardware is fault-tolerant with aredundancy that is scalable over wide ranges. The software isbased on proven algorithms for turbomachinery control. The
functionality is scalable to almost any degree desired. The
controllers optionally offer teleservice for remote maintenance,data analysis and system optimization.

Advantages and benefits+ Adaptable control system with maximum reliability andavailability+ Suitable for all steam turbines, even those with special
control functions or in system-critical applications+ Compressor control can be integrated as an option+ Control of motor-driven compressors is also possible+ Communication interfaces to the control system fordiagnostics, condition monitoring, etc.
+ Extensive fault detection and diagnostics+ Redundant components can be exchanged during
operation19

20Services and engineering for
actuators and control systems
Our goal is to ensure that your production runs
according to your expectations – reliably, efficiently
and profitably.

We are partners over the entire life cycle of your turbine orplant. This starts with the planning, continues during use andalso includes the development of cost-effective concepts for
operation, maintenance and repair.
Service from the manufacturer pays off because we know ourproducts inside and out. The engineers and technicians ofVoith’s service network are available worldwide. Voith maintains
service and sales facilities in all regions of the world.

Advantages and benefits+ Our services allow you to ensure the productivity
and efficiency of your system+ You profit from our product and technology know-how
over the entire life cycle of your turbine or system+ Our service experts have a high level of competencein the industry. They develop customized service
and engineering solutions that help you minimize
operating costs and downtime

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Life cycle
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Retrofit andmodernization
Advice and support, for example:− Analysis of the installed technology− Demonstration of potential improvements−	Designation of the new technology according
to your requirements−	Suggestions for products and systems withcorresponding range and offers• Disassembly of old components• Assembly of new components• Commissioning• Production support during the start-up phase• Training for operating and maintenance personnel•22

Advantages and benefits+ Increasing the productivity of your system withcustomized solutions+ Improving process quality with precise controlsystems+ Increasing energy efficiency with advanced actuatorsand control systems+ Decreasing maintenance and repair costs with reliable,easy-to-service components+ Enhancing system availability with a secure supplyof spare parts+ Expanding functionality and easy servicing with newtechnologies (for example, the Internet of Things [IoT]environment)+ Easy migration to a new technology by way ofcompetent, complete service

Technical service
and engineering
Technical advice and engineering support, for example:− Answers to questions about products and their use− Help in troubleshooting the system− Performing failure modes and effects analysis (FMEA)−	Involvement in optimizing the total cost of ownership(TCO)−	Suggestions for increasing productivity and optimizing
the process−	Developing strategies for operation, maintenance andrepair• Inspection of the actuators and control systems (even fornon-Voith products)• Standardized product training and system-specific training• Consulting via phone, e-mail or on site
• Remote and on-site diagnostics•

Advantages and benefits+ Increased machine and system availability resulting
from optimized operation+ High productivity and product quality by using thebest processes+ Low total cost of ownership (TCO) as a result ofinvestment and operating costs that have been
carefully considered+ Products used in the best possible way as a result of
training by the manufacturer with first-hand expertise+ Cost and time savings as a result of competent andprompt advice23On-site maintenance,repair and overhaul
Preventive maintenance and repair of the actuatorsand control systems:− On-site maintenance and inspection− On-site overhauling− On-site repairs• Installing and commissioning• Production support during the start-up phase• Servicing the actuators and control systems ofother manufacturers•

Advantages and benefits+ High system availability by providing maintenance andrepair at the highest level+ Predictable maintenance costs and personnel
schedule planning due to targeted preventive
maintenance+ Maximum productivity due to consistent turbine
performance

Maintenance, repair andoverhaul with Voith
OverhaulRepairs• Maintenance• Inspection• Update the products with the latest technology••

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Advantages and benefits+ A long lifetime and high availability of the products
due to the highest level of maintenance and repair+ Maximum cost transparency from binding quotes
and reports on the findings+ More effective and affordable service as a resultof the manufacturer expertise+ Consideration of the maintenance time window
due to flexible personnel schedule planningOriginal
Voith spare parts
Faster and more reliable global shipment of stock spare
and wear parts, even express delivery upon request• Standard spare parts are stocked in our service branch
offices worldwide• Advice on identifying and selecting spare parts• Spare parts are available for up to 20 years, after which
replacement products are available• Consulting on your spare parts management• Preparation of spare part packages that match your Voith
products precisely and that meet your operating conditions• Continuous refinement of the original spare parts•

Advantages and benefits+ Secure spare-part procurement using themanufacturer’s expertise+ A long product lifetime due to perfectly matchedspare parts+ High system availability due to secure spare-part
supply+ Functionally reliable spare parts resulting from
100% final testing25

VT 0325, en, BDI, 2021-05. All data and information without obligation. Subject to change.

Voith Group
St. Poeltener Str. 4389522 Heidenheim, Germany
Contact:
Phone +49 7951 32-470
turcon@voith.com
www.voith.com/turbine-control