Shanghai Kelida Automatic Control Valve Co., Ltd. (formerly known as Shanghai Zhongtai Automation Instrument Factory, founded in 1995 and restructured in 2004) specializes in the production of new self operated regulating valves and high-performance CV3000 series regulating valves and accessories. Direct regulating valves: single seat regulating valve, cage regulating valve, low-noise regulating valve, high-pressure regulating valve, bellows regulating valve; Rotary control valves: cam flex valves, butterfly valves, precision ball valves; Special type regulating valves: black water valve, three-way valve, angle valve, Venturi valve, high pressure differential valve, low temperature valve, insulation valve, plastic lined valve, ceramic valve, discharge valve, self operated regulating valve; Attachments: valve positioner, converter, accelerator, holding valve, multifunctional piston actuator, handwheel mechanism, etc. Through the introduction of technology and further innovation, based on the CV3000 series regulating valve, our company has also developed the CV3000 series electric regulating valve. The company has also achieved great results in the development and research of self operated regulating valves. So far, it has successfully developed two series, six categories, and more than 200 specifications of self operated regulating valves, including self operated pressure regulating valves, self operated differential pressure regulating valves, self operated temperature regulating valves, self operated flow regulating valves, combined self operated regulating valves, and nitrogen sealing valves. As a professional manufacturer of self operated regulating valves, our company also participated in the drafting and development of product standards for self operated pressure regulating valves "JB/T 11049-2010" and self operated temperature regulating valves "JB/T 11048-2010". The co drafting units also include Chongqing Chuanyi Eleventh Factory Co., Ltd. and Anshan (Danfoss) Control Valve Co., Ltd. The company has successively obtained the TS special equipment manufacturing license, ISO9001:2015，ISO14001:2015，OHSAS18001: 2007 Three Major Management System Certification, SIL3 Functional Safety Certification, CE Certification, and has become a qualified supplier for China Petroleum&Chemical Corporation, China National Petroleum&Natural Gas Corporation, China Huaneng Group Co., Ltd., and China State Grid Corporation Limited.