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Changmao Valve Group Co., Ltd., located in Xicun Town, Gongyi City, Henan Province, is a professional unit integrating R &D, manufacturing and sales of valve joints, pipeline equipment and related products. Founded in 1988, the company covers an area of 10000 square meters and has 80 employees. Annual output of 400000 sets of valve connector products. The company is founded on the basis of the former Gongyi Changmao water supply and drainage materials general factory and the former Sino-South Korean joint venture Hanan Changmao  Yuanyi Valve Co., Ltd. Changmao company is a self-supporting import and export enterprise, exhibitor of Canton Fair, high-tech enterprise, ISO9001:2008 certification enterprise, and one of the top ten science and technology enterprises in Henan Province. The registered trademark "Changmao" brand is a famous brand in China.
The products mainly adopt GB / T, JB, Hg, ISO, API, ANSI, BS, DIN, en, JIS, KS, uni, as, SABS and other standards. The production diameter is dn15-dn4000 (1 / 2 "- 160), pressure grade is 0.25mpa-42mpa (125lg-2500lb), working temperature is - 30 ℃ - 570 ℃, rubber materials are NR, EPDM, NBR, neoprene, etc Materials mainly include Q235, Q345, SS304, SS316, etc., products mainly include rubber joints, steel expansion joints, stainless steel bellows, rubber check valves, compensator, air duct joints, power transmission joints, soft joints, flanges and more than 100 series, more than 1000 specifications. Widely used in petroleum, petrochemical, chemical, electric power, construction, paper, medicine, water supply and drainage and other fields.
The company's products have been used in many major projects, such as Beijing West Railway Station, CCTV, Yanshan Petrochemical, Shanghai Baosteel Power Plant, etc., and have cooperated with more than 100 domestic import and export companies to export to the United States, Japan, Spain, Britain, Germany, South Korea, Vietnam, Singapore, Malaysia, Dubai, Brazil and other countries.

Company Size

The company is located in Xicun Town, Gongyi City, Henan Province, covering an area of 10000 square meters, with a building area of 10000 square meters, 100 employees, including 26 senior technical personnel, 25 intermediate technical personnel, more than 300 sets of production equipment, with an annual output of 400000 sets of valve joints. The company has a complete production line, from design, raw material refining, mechanical processing, assembly, spraying, all the way to inspection, packaging, all independently completed in the Changmao plant area. The company's business is divided into domestic and international departments, adopting technology and management experience to provide products and services for customers.

Enterprise Products

Rubber joint: flange type, screw thread type, single sphere, double sphere, concentric reducer, eccentric reducer, elbow, buckle groove, flanging, anti pulling, oil resistance, wear resistance, acid and alkali resistance, PTFE lining and other styles, connection methods, use environment and materials to meet the various needs of customers.
Expansion joint: single flange, double flange, force transmission, limit, detachable, gland type, nut type, ball type, large deflection and other styles, Q235, SS304, SS316 and other materials.
Bellows: shock absorption type, buried type, horizontal, axial, universal, large and small pull bar type, unrestricted, square type, circular type, etc., SS304, SS316, SS316L and other materials.
Rubber check valve: clamp type, flange type, straight mouth, curved mouth, duckbill valve, natural rubber, EPDM, NBR, neoprene, butyl rubber and other rubber materials.
Air duct compensator: rubber air duct, fabric fiber and other materials, rectangular and circular shapes.
Flange: GB / T, JB, Hg, ISO, API, ANSI, BS, DIN, en, JIS, KS, uni, as, SABS and other standards are adopted. Corresponding products are rubber joint, expansion joint, bellows compensator, rubber return valve and other standards.
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