Ningbo Jack Long Precision Co., Ltd. was founded in August 1998 and is a wholly-owned subsidiary of Ningbo Jintian Copper Industry (Group) Co., Ltd. Ningbo Jack Long Precision Co., Ltd. specializes in the production of various types of water supply and drainage valves, cast steel cast iron valves, gas valves, HVAC valves, plumbing and sanitary ware, water meter and various pipe fittings. It is a high-tech integrating R&D, manufacturing, sales and service. The company has widely used products in water supply and drainage systems, gas systems, urban heating, HVAC and product supporting fields, and its sales network is spread across the country, with nearly 500 sales outlets, ranking among the top in the civil valve field.

Jack Long Seiko has successively passed the three major management systems certifications of ISO9001, ISO14001 and ISO45001, and obtained the "Zhejiang Manufacturing Certificate" in November 2018, and was recognized as a "high-tech enterprise". Jack Long Seiko was rated as "Ningbo Science and Technology Progress Award”.

It is equipped with automated production equipment and testing equipment, and uses customized Jintian copper rods as raw materials to ensure the quality of the product. The company focuses on product research and development and technological innovation, has more than 180 national patented technologies, and has formulated/participated in more than 20 national standards. The company is the first to introduce intelligent and international production equipment and testing equipment, has an internationally advanced, efficient, energy-saving and environmentally friendly Italian imported intelligent forging line, a batch of digital high-precision multi-axle water truck combination aircraft, and an imported fully automatic intelligent ball valve. Equipment line and imported three-coordinates and other equipment. With a complete set of strict product management systems and full process monitoring from raw materials to finished products, it has effectively guaranteed the high quality of Jackron products, created Jackron's outstanding brand advantages, and won the recognition and trust of users.