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What is a valve positioner? What are its principles and functions?

What is a valve positioner? What are its principles and functions?

Valve positioners, classified by structure into pneumatic valve positioners, electro-pneumatic valve positioners, and intelligent valve positioners, are major accessories for control valves. They are usually used with pneumatic control valves. They receive output signals from the regulator and then use their output signals to control the pneumatic control valve. After the control valve operates, the displacement of the valve stem is fed back to the valve positioner through a mechanical device, and the valve position is transmitted to the upper-level system via an electrical signal.

2025-01-10 14:48

A Guide to Preparing and Inspecting Electric Actuators Before Operation

A Guide to Preparing and Inspecting Electric Actuators Before Operation

To ensure the normal operation of the electric actuator and improve the quality and reliability of electric valve control and regulation, pre-operation preparation and testing are required for electric actuators in practical applications. Usually, the auxiliary devices of the electric actuator are checked, including the valve intelligent positioner module and the handwheel mechanism.

2021-02-26 10:21

The electric actuator of the electric butterfly valve is getting hot. How can this be solved?

The electric actuator of the electric butterfly valve is getting hot. How can this be solved?

Butterfly valves are widely used in the chemical and other industries. During use, problems may arise due to improper operation by the operator or misuse of the butterfly valve, leading to malfunction. A common problem is overheating of the electric actuator in electric butterfly valves. Many customers have encountered this motor overheating issue. A suitable solution can be implemented in minutes, but an unsuitable approach will directly damage the motor and affect the normal operation of the entire valve. Generally, some heating is normal during the normal operation of a motor, especially during frequent switching. Slight heating of the motor is therefore not a problem. However, if the motor temperature rises significantly and does not decrease after the valve is closed, there is a problem. How to solve it?

2021-02-26 10:17

What are the advantages of electric actuators?

What are the advantages of electric actuators?

Actuators are indispensable in the field of intelligent control. Among various types of actuators, electric actuators play a particularly important role, attracting increasing attention and wider application. So, what are the advantages of electric actuators?

2021-02-26 10:13

What factors affect the efficiency of valve actuators?

What factors affect the efficiency of valve actuators?

Valve actuators are drive devices that enable valves to open, close, or adjust control. They allow for remote control, centralized control, and automatic control of valves. They are widely used in the power, metallurgy, petroleum, chemical, papermaking, and wastewater treatment industries. So, what factors affect the efficiency of valve actuators?

2021-02-26 10:09

What are the criteria for selecting the right valve actuator?

What are the criteria for selecting the right valve actuator?

Correctly selecting an electric valve device is one of the basic conditions for meeting pipeline usage requirements. If the selected electric valve is inappropriate, it will not only affect usage but also lead to adverse consequences or serious losses. So, how do we correctly select an electric valve device? Let Dalian Hongbo Electric Power Engineering Co., Ltd. explain it to you slowly:

2021-02-26 10:04