trunnion mounted ball valve

3 Tips For Selecting COVNA Automated Actuators

The automation actuator is a device that facilitates the realization of industrial automation. Automatic actuators and valves are used together in various working conditions to realize remote control and achieve the purpose of flow regulation.

As an experienced actuator manufacturer, COVNA offers a variety of actuators for you to choose from. In this article, we will briefly introduce how to choose an actuator for your reference. Hope that helps you pick the right actuator.

  1. Power Source

According to the power source, actuators can be divided into electric actuators and pneumatic actuators.

● The electric actuator can be driven on and off by DC12V, DC24V, AC24V, AC110V, AC220V, AC380V and other special power sources.

● The pneumatic actuator uses clean air as the power source to drive the opening and closing. At the same time, pneumatic actuators can be divided into spring return type and double-acting types. Single-acting pneumatic actuators are air to open, when air is interrupted the actuator will close. Double-acting pneumatic actuators are air to open and air to close.

  1. Rotation Range

According to rotation range, the actuator can be divided into quarter-turn 90 degrees type and multi-turn 360 degrees type.

● 90 degrees type actuator suitable for the ball valve and butterfly valve.

● 360 degrees type actuator suitable for the gate valve and globe valve. It is also suitable for the ball valve and butterfly valve which need a higher torque to open or close.


  1. Function

Electric actuators have a variety of styles for you to choose from.

● ON/OFF type electric actuator is for opening and closing 90 degrees. Signal control is not accepted.

● Modulating type electric actuator and intelligent type electric actuator is the same function. Both for regulating the open/close angle within 0 to 90 degrees by signal. But intelligent type actuator has an LCD display screen which could help you control and check locally and remotely easier.

● Explosion-proof type actuator, underwater type actuator and auto-return type actuator are available for special applications.

However, a pneumatic actuator is simple. Normally, a pneumatic actuator is just for open/close fully. If you want it to be modulating type or control remotely, we need other accessories to assist. Such as positioner, limit switch, F.R.L and directional control valve.

For more info or inquiries for valve and actuator, feel free to consult us at

2 Guidelines For Selecting The COVNA Automated Valves

Automated valves are the market trend. At present, many industries have begun to use automatic valves to replace manual valves, thereby improving production efficiency, reducing labor costs, and obtaining more profits.
There are many types of automation valves in COVNA company, in this article, we will introduce you to 2 guidelines to help you choose the right valve and actuator.

1. Automated Actuators

The actuator is the most important device in the automatic valve. Actuators can be divided into electric actuators and pneumatic actuators according to the driving source.

Electric actuators are driven by AC/DC power. It can receive and feedback 4-20mA, 1-5V or 0-10V signals, and can be controlled by Bluetooth or manual override helping you to achieve remote control or local control.

Pneumatic actuators are driven by clean air. At the same time, according to the structure, pneumatic actuators can be divided into double-acting types and single-acting types to meet your different actuation requirements. Compared with electric actuators, pneumatic actuators are low-cost.

However, pneumatic actuators need to use other pneumatic accessories to achieve the effect of remote control, such as positioners, F.R.L, limit switches, reversing solenoid valves, etc.

2. Valve

There are ball valves, butterfly valves, gate valves, knife gate valves and globe valves for you to choose from.

Ball valve and butterfly valve belong to the quarter-turn valve. They are suitable for transport, cut-off, changing the flow direction of the medium, regulation, confluence and diversion.

Gate valves, knife gate valves and globe valves are linear valves. Gate valves, as well as knife gate valves, are suitable for starting and stopping the flow. The globe valve is suitable for transport, cut-off and regulation of flow.

Therefore, you can choose the valve according to parameters such as usage, size, pressure, temperature, etc.

As an experienced manufacturer providing high-quality automation solutions for up to 2000+ projects, COVNA will assist you in selecting and providing the right solution to help your project run well.

For more info or inquiries about valve, please contact