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China Aviation Industry Group 609

AVIC Nanjing Servo Control System Co., Ltd. for the China Aviation Industry Corporation Jincheng Nanjing Electromechanical Hydraulic Engineering Research Center, a subsidiary of the holding company, originated in the China Aviation Accessory Research Institute (609) is China's long history (specializing in the establishment in 1968), leading technology electro-hydraulic servo valve R & D and manufacturing centers.

Research and development and supporting the delivery of hydraulic products are: force feedback single-stage valves, dual-nozzle baffle two-stage servo valves, jet electro-hydraulic servo valves (jet pipe and jet deflector), electro-hydraulic pressure servo valves (jet and deflector type), direct-drive valves (DDV and RDDV), integrated control valves, solenoid hydraulic locks, pressure-reducing valves and pressure-reducing valves, hydraulic pumps, servo amplifiers, electro-hydraulic servo valves, dynamic static test beds and measurement and control equipment. test bench and measurement and control equipment, etc. A total of more than 200 types of products.

China Shipbuilding Group 704 Research Institute

The predecessor of Shanghai Hengtuo Hydraulic Control Technology Co., Ltd. was the Servo Valve Industry Department of the 74th Institute of China Shipbuilding Industry Corporation (CSIC). The Seventy-fourth Research Institute was founded on November 1, 1956 mainly engaged in hydraulic systems, special valves and other 37 professional research, assembly and service.

在钢厂轧机上上的应用

"Electro-hydraulic servo valves" is a specialty of the 704 Institute, with more than 30 years of accumulated experience.

Private enterprise Norma Hydraulics

Established in 2005, Shanghai Norma Hydraulic System Co., Ltd. is committed to building a high-tech enterprise integrating product development, intelligent production, sales and technical service. The main business includes electro-hydraulic servo valves, proportional valves, proportional multi-way valves, high-performance threaded cartridge valves, counterbalance valves, hydraulic integrated manifolds, and other high-end hydraulic components products.

Hydratight, Pioneer of Servo Valves for 3D Printing

Founded in 2020, Hydratight is a high-tech enterprise specializing in the research, development, production and sales of servo valves and servo drive systems for hydraulic robots. The company is headquartered in Wuhan East Lake Hi-Tech Development Zone and has set up R&D and production bases in Jiading District, Shanghai. Aiming at servo valves, an industrial-strength product, the company adopts rotary direct drive and additive manufacturing technology to solve the core production and manufacturing process of servo valves, and realizes the domestic substitution of servo valves.

A Comprehensive Comparison

This article summarizes two military SOEs as well as two civilian companies that have made different strides. The military enterprises, in particular, have made great strides in the civilian market over the years.

The table below summarizes products from MOOG, 609, 704, Norma, and Hydratight. As the products are always under constant development, if interested in specific products, you can contact the respective manufacturers.

It should be noted that there are many domestic research institutes and enterprises are also engaged in the field of servo valve R & D and manufacturing, limited by personal knowledge and energy constraints, can not be sorted out one by one, you are welcome to provide so that I can improve. If there is a mistake, you are welcome to correct.

Source: hydraulic transmission and control + catch up with MOOG's domestic servo valves, what have done so far (qq.com)