Gas Turbine Control

 
Demanding applications such as gas turbine control require reliable operation in hazardous environments. Diakont’s industry-leading line of explosion-proof electric servo actuators are used to increase efficiency, safety, and reliability in the gas turbine industry for applications such as:
  • Inlet guide vane (IGV) control
  • Nozzle guide vane (NGV) control
  • Fuel valve control

Diakont explosion-proof actuators and control units deliver exceptional reliability for over 20 years of fail-free operation. Diakont actuators incorporate progressive technology, including precisely machined roller screws and high-force permanent magnet synchronous motors (PMSM). These components are integrated into a single unit, thus providing exceptional performance in a compact footprint. Hydraulic systems have historically been used in the turbine control industry. However, hydraulic systems present issues of complexity, maintenance costs, and space challenges due to the need for auxiliary hydraulic components. Diakont’s electric servo actuators deliver a direct replacement for hydraulic systems and provide a more compact, more cost-effective, and safer solution.

Overview

The advantages of replacing your existing actuators with Diakont's explosion-proof electric servo actuators include:

  1. Low maintenance with a long service life
  2. Ideal for replacing maintenance heavy/complex hydraulic systems
  3. Most compact actuators of comparable performance in the turbine control industry
  4. High durability in severe operating environments
  5. Smart control unit for simple integration and troubleshooting
Low Maintenance with a Long Service Life

Diakont’s electric servo actuators provide exceptional service lifetime while requiring minimal maintenance. Diakont’s linear and rotary actuator configurations both use advanced roller screw technology which ensures an operation lifetime of 20 years or more. Also, Diakont’s robust actuators only require re-lubrication maintenance once every four years.

 

Compact Design

Diakont electric servo actuators incorporate progressive technology, including precisely machined roller screws and high-force permanent magnet synchronous motors (PMSM). These components are integrated into a single unit, thus providing exceptional performance in a compact footprint.

 

Smart Control Unit

Diakont’s explosion-proof smart control unit provides the ability to control actuators with an analog or CAN interface and facilitates easy actuator integration, potential fault detection, and troubleshooting service.

 

 

 

Configuration Options

Diakont electric servo actuators are available with various options to ensure reliable operation in gas turbine applications.

  • Fail-safe spring
  • Electromechanical brake
  • Terminal box at actuator for easy disconnect cables
  • Redundant motor
  • Manual drive, and more
IGV/NGV Actuator Specifications

Medium force

Medium force

High-Force

Rated force

31 kN

113 kN (220 kN Option)

Maximum speed

100 mm/sec

55 mm/sec

Brake

Option available

Option available

Fail-safe spring

Option available Option available

Operating temp

 
Actuator: -40°C to+120°C
Control unit: -40°C to +60°C
 
Actuator: -40°C to+120°C
Control unit: -40°C to +60°C

Storage temp

 
Actuator: -50°C to +120°C
Control unit: -40°C to +85°C
( -50°C option)
 
Actuator: -50°C to +120°C
Control unit: -40°C to +85°C
( -50°C option)

Hazardous area

 
Actuator: Atex Zone 2*
(Atex Zone 1 option)
Control unit: Atex Zone 2
 
Actuator: Atex Zone 2*
(Atex Zone 1 option)
Control unit: Atex Zone 2

Vibration resistance

Up to 10G (10-500 Hz) Up to 10G (10-500 Hz)

*Please request information about UL and CSA certificates from a local Diakont representative

 

Fuel Valve Control Actuator Specifications

Configuration options

Rotary

Linear

Rated force/torque

30 Nm

6 kN

Powered closing time

0.1 sec

0.25 sec

Unpowered closing time

0.2 sec

0.35 sec

Fail-safe spring

Yes Yes

Position accuracy

 
±4 arcmin
 
±0.04 mm

Operating temp

 
Actuator: -40°C to+100°C
Control unit: -40°C to +60°C
 
Actuator: -40°C to+100°C
Control unit: -40°C to +60°C

Storage temp

 
Actuator: -50°C to +100°C
Control unit: -40°C to +85°C
( -50°C option)
 
Actuator: -50°C to +100°C
Control unit: -40°C to +85°C
( -50°C option)

Hazardous area

Actuator: Atex Zone 1*
Control unit: Atex Zone 2
Actuator: Atex Zone 1*
Control unit: Atex Zone 2

Vibration resistance

Up to 10G (10-500 Hz) Up to 10G (10-500 Hz)

*Please request information about UL and CSA certificates from a local Diakont representative

 
Custom Modifications

The specifications listed for the IGV/NGV actuators and the fuel valve actuators are based on typical configurations. However, custom modifications can be made to accommodate specific customer requirements. Contact a Diakont representative for more information.

 
Local Customer Service

Contact a local technical support and troubleshooting from Diakont facilities in the USA (San Diego), Italy (Arezzo), and Russia (St Petersburg). Diakont’s field teams support installation, tuning and maintenance. Diakont also has various test benches for endurance and functional testing.