In industrial processes, the role of a valve is often more than simply opening or closing the flow. Increasingly, processes require automated, precise, and remotely controlled operation. In such cases, valve operation is achieved using an actuator.

A valve actuator enables a ball valve to be opened and closed without manual operation. With an actuator, the valve can be integrated into an automation system, improving process control, safety, and efficiency.

In this article, we explore valve actuators: their operating principles, available options, and when an actuator is the right solution for a process.

What is a valve actuator?

A valve actuator is a device that generates the movement required to open and close a valve.

Maper ball valves are designed for quarter-turn actuators, which are particularly suited for quarter-turn valve designs such as ball valves.

The most common actuator type used with ball valves is the pneumatic actuator.

Actuator solutions for ball valves

Pneumatic actuators

Pneumatic actuators are the most common solution for quarter-turn ball valves in industrial applications. They operate using compressed air and provide reliable and fast valve operation.

Pneumatic actuators are available in two main configurations:

1. Double-acting actuators
Compressed air is used both to open and to close the valve.

2. Single-acting actuators (spring-return)
Compressed air moves the valve in one direction, and if the air supply is lost, an internal spring returns the valve to a predefined fail-safe position (either open or closed).
This design improves process safety in fault situations.

Electric actuators

All quarter-turn electric actuator models available on the market are compatible with Maper-manufactured ball valves.

Electric actuators allow valves to be operated electrically and can be integrated into automation systems using various control methods.

Limit switches, position feedback and fieldbus connectivity

All actuator options can be equipped with:

  • limit switches (mechanical or inductive)
  • valve position feedback
  • fieldbus connectivity

Limit switches and position feedback enable real-time monitoring of the valve position. Fieldbus connectivity allows the actuator to be integrated into industrial automation and process control systems.

Benefits of valve actuators

1. Automated and remote operation

An actuator enables the valve to be operated without manual intervention. This improves process control and enables centralized operation.

2. Improved process safety

Especially spring-return pneumatic actuators increase safety, as the valve moves to a predefined position if the air supply is lost.

3. Integration into automation systems

With limit switches, position feedback, and fieldbus connectivity, actuator-operated valves can be integrated into broader process control systems.

Typical applications

Ball valves equipped with actuators are commonly used in:

  • process industries
  • energy and steam systems
  • heating and cooling systems
  • chemical processing
  • applications requiring automated control and remote monitoring

When is an actuator the right choice?

A valve actuator is the right solution when:

  • valve operation needs to be automated
  • remote control is required
  • limit switches or position feedback are needed
  • the valve must be integrated into an automation system
  • safety requirements demand a predefined fail-safe operation

Summary

Valve actuators bring ball valves into modern industrial automation. Pneumatic single-acting and double-acting actuators provide reliable and safe operation, while electric actuators enable flexible electrical control.

With limit switches, position feedback, and fieldbus connectivity, actuator-operated valves support improved process control, safety, and efficiency in demanding industrial environments.



Read the previously published parts of this article series:

Would you like to learn more about Maper’s valves and actuators? Get in touch, we’d be happy to tell you more!

17.3.2026