Actuation

What is the function of actuator valve?

The main function of an actuator valve is to control the flow of media via logical functions using a semi, or fully automated system, which is normally controlled via a PLC or other logic function software. Many different types of actuator valves are available on the market, most types of valves can accommodate some form of an actuator to allow the remote switch, such as; ball valve, butterfly valve and globe valve.

What is the difference between Hydraulic, Pneumatic, and Electric actuators?

A Hydraulic Actuator uses a fluid for this driving media, which is normally a mineral oil, and will have several components to allow the correct operator of the Hydraulic Actuator, this will include;

• Hydraulic pump
• Reservoir
• Flow controllers and or Regulation
• Filtration
• 3 port 2 position for single acting actuation
• 5 port 2 position for double acting actuation
• 5 port 3 position for double acting-controlled position, with Centre closed
• Hydraulic piping
• Actuator (Rotary or Linear)
• Positioner

A Pneumatic Actuator, probably the most common form of actuation, and uses the media of compressed air, depending on factory standard around 5-7bar or 0.5-0.7Mpa, and will include the following items:

• Compressor
• Flow controllers and or Regulation
• Filtration
• 3 port 2 position for single acting actuation
• 5 port 2 position for double acting actuation
• Pneumatic piping, Flexibly or solid
• Actuator (Rotary or Linear)
• Positioner

An Electric Actuator use the means of electricity, mains or stored supply like a battery pack for remote application:

• Electrical energy, normally 24Vdc, but can vary depending on installation and customer needs.
• Electrical motor or Solenoid
• Gearbox
• Positioner