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Pneumatic actuators and common types

Pneumatic actuators and common types

2025-02-21 11:00

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

Dalian Wanxun Electric Engineering Co., Ltd.
CDG
CDG

Germany CDG Control fluid technology company

Add:Vogelsanger Weg 90,40469 Dusseldorf

Tel:+49(0)211/56677-411

U.S CDG Control fluid technology company

Add: 4240, 110 Cass Street, Detroit, Michigan, USA

Tel: 001-313-5727770

Korea CDG Control fluid technology company

Add:Gangneung South Province, Changwon City, Cheongsan District, Gajin-dong, 391-1

Tel: (0)82-055-288-5091

Vietnam CDG Control fluid technology company

Add:Guiwu Industrial Park, No. 6, Bac Ninh City, Bac Ninh Province, Vietnam

Tel: +(84)592-6666675

CDG(HK)Control Fluid Technoligy Company Limited

Room 01, 21st Floor, Xingfa Commercial Building, No. 9, Yanchang Street, Mong Kok, Hong Kong

Tel: 00852-3645129/ Fax: 00852-36458092

CDG (Dalian) Fluid Control Technology Company

1-12-3, B6#, Beifu Mingyuan, Ganjingzi District, Dalian

Tel: 0411-39910230/ Fax: 0411-39735830

Copyright © 2025 CDG

Beijing Representative Office

Address: Room 1197, No. 82, Huanzhen Road, Bohai Town, Huairou District, Beijing

Tel: 010-61258322/Fax: 010-61258322

Shanghai Representative Office:

Address: Building 2, No. 268, Qinggong Road, Fengxian District, Shanghai

Tel: 021-39277467/Fax: 021-31906974

Guangzhou Representative Office

Address: No. 510, Building 1, Bai Zhong Creative Park, No. 240, Xinqiao Village Section, Shilian Road, Dalong Street, Panyu District, Guangzhou

Tel: 020-87675871/Fax: 020-87675872

Fuzhou Representative Office

Address: Room 3302, Building 53, Linjiangyuan, Minjiang Century City, Cangshan District, Fuzhou, Fujian

Tel: 0591-83617129/ Fax: 0591-83617129

Dalian Representative Office

Address: No. 3, 6th Floor, No. 18-4, Jinquan Zhongyuan, Shahekou District, Dalian, Liaoning Province

Tel: 0411-39224868/ Fax: 0411-39224868

Shandong Representative Office

Address: Room 1704, Unit 1, Building 12, Laxiangyuan, Huaiyin District, Jinan, Shandong Province

Tel: 0531-87950969/Fax: 0531-87950969

Xi'an Representative Office

Address: Room 1401, Unit 1, Building 2, Yankai Community, west of Jianshanfang, Yanta West Road, Yanta District, Xi'an, Shaanxi Province

Tel: 029-33317216/Fax: 029-33317216

Nanjing Representative Office

Address: Room 710-1177, No. 67, Nanhu East Road, Jianye District, Nanjing

Tel: 025-57596109/Fax: 025-57596109