Ningbo Yiji Valve Manufacturing Co., Ltd.was established in 1958 and is a national high-tech enterprise with over sixty years of history, holding qualifications for manufacturing large and medium-sized valves. It is also a national specialized, refined, unique, and innovative little giant enterprise, and has been included in the Ningbo Manufacturing Single Champion Cultivation Database. The company's registered capital is 100.08 million yuan. It is a qualified supplier to the China Urban Water Supply and Drainage Association, Sinopec, and CNOOC Group. It is a board member of the Valve Branch of the China General Machinery Industry Association and a vice president unit of the Water Supply and Drainage Equipment Branch of the China Building Metal Structure Association. The factory covers an area of 33,300 square meters and houses a provincial postdoctoral workstation and a provincial high-tech enterprise research and development center. It is also a base for innovation and entrepreneurship for master craftsmen. The company is equipped with senior and mid-level professional technicians, advanced precision processing equipment, specialized equipment, physical and chemical testing equipment, and a full range of valve inspection equipment.
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The selection of sealing surface material is very important to the performance of the valve, and it is necessary to consider corrosion resistance, abrasion resistance, erosion resistance, hardness stability, matching with the linear expansion coefficient of the body material and oxidation resistance and thermal stability at high temperatures. It is difficult to fully meet all conditions, and it is necessary to meet key requirements according to the valve use and medium characteristics, such as high speed medium valves need strong erosion resistance, and high hardness materials containing impurities are selected.
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Ningbo Yiji Valve Manufacturing Co., Ltd. with superb technology, excellent quality and first-class service, in Hubei Xiaogan city water supply system raw water relocation project outstanding performance, won high praise from customers. In the face of challenges, all employees worked together to successfully complete the project and improve the water carrying capacity. This honor encourages us to continue to innovate and contribute to the development of the industry.
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All-weather high pressure ball valves are gravity structures with overlapping seats.It is characterized by the soft contact between the valve disc and the seat with air cushion, good air tightness, not easy to frost freeze, suitable for use in cold areas.
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