Zhejiang Oudelong Auto-control Valve Co., Ltd. is located in the "Township of Pump and Valve in China" - Wuxing Avenue, Dongou Industrial Zone, Oubei Town. It is a technical company integrating the engineering, manufacturing, marketing and service of industrial automation control system. It specializes in R&D and production of pneumatic, hydraulic and electric drive devices and matching products of auto-control valves. This is the case.

Pneumatic actuatorThe actuator and the regulator are unified as a whole. The actuators are membrane type, piston type, fork type and gear rack type. The piston stroke is long and suitable for situations requiring greater thrust, while the membrane stroke is small and can only drive the valve stem directly. Pneumatic fork actuator has the characteristics of large torque, small space, torque curve more in line with the torque curve of the valve, but it is not very beautiful; it is commonly used in large torque valves. The rack-and-pinion pneumatic actuator has the advantages of simple structure, stable and reliable operation, and safety and explosion-proof. It has been widely used in power plants, chemical industry, oil refining and other production processes with high safety requirements.

shortcoming：The control precision is low, the dual-function pneumatic actuator can not return to the preset position after the gas source is cut off. Single-acting pneumatic actuator can return to the preset position by spring after air source is cut off.

advantage：Accept the continuous gas signal, output linear displacement (power/gas conversion device, can also accept continuous electrical signal), and some with rocker arm, can output angular displacement.

Pneumatic actuator is a combination of the latest technology and practical material development and design, with the following characteristics:

（1）Strong reliability

（2）Compact structure

（3）Modernized Aesthetic Modeling

（4）High performance and high accuracy

（5）Design is innovative

（6）Compliance with the latest international norms

（7）Widely applicable high level

（8）Anti-corrosion Technology of Surface with New Materials

（9）More economical and economical choice of multi-specification products

（10）Patented universal output shaft and multi-function indicator, positioner, angle fixator, manual turbine mechanism can be selected. Double action (DA), single action (SR), air supply: 2.5-8 bar, torsion: 3.0-4150 can also be selected. Therefore, the pneumatic actuator mainly uses the pneumatic valve.

On the basis of introducing advanced technology and equipment at home and abroad, the company has designed and manufactured a series of products with contemporary leading level, which are widely used in the fields of petroleum, chemical industry, light industry, power station, metallurgy, HVAC, medicine, fire protection, water treatment and other pipeline installations. It has successively provided high-quality products and good services for national key projects such as power plant sets, petrochemical industry, nuclear power, military industry, oil field development, etc. And exported to Europe, America, the Middle East and Southeast Asia market, well received by users.