The history of ball valves dates back more than a century. In 1942, the invention of PTFE, a new synthetic material by DuPont of the United States, brought a revolutionary breakthrough to ball valves, making them the fastest-growing valve category since World War II.
With full-bore design and low flow resistance, ball valves are widely used in oil and gas transmission pipelines, and have been extensively adopted in high-tech sectors including nuclear industry and aerospace industry for conveying hazardous media and ultra-low temperature liquids. Later, high-parameter ball valves have been further expanded into new application fields, including large caliber, high pressure, low temperature, ultra-low temperature, high temperature, high vacuum and solid particle conveying.
N-J VALVE CO.,LTD. continuously optimizes the sealing performance of valves under wide differential pressure and wide temperature variation ranges, while maintaining low operating torque and long service life. Reducing leakage from stem packing is also the persistent pursuit of N-J.
The high-performance floating ball soft-sealed ball valves manufactured by N-J adopt the elastic lip seal principle, featuring:
- Reliable sealing performance
- Bidirectional sealing capability
- Automatic wear compensation for valve seat sealing surface
- Avoiding leakage caused by plastic deformation of conventional seats due to differential pressure fluctuation
- Avoiding leakage caused by plastic deformation of conventional seats due to medium temperature change
- Low operating torque
- High-speed on-off performance for automatic valve applications
- Exceptionally long service life
Upon customer request, the high-performance ball valves can also be equipped with fire-safe and anti-static functions.
The company continuously researches formulations and processing technologies of sealing materials, providing pure PTFE and reinforced PTFE sealing materials. We can also supply various imported polymer sealing materials from the United States as required, which are suitable for special working conditions such as higher temperature, large differential pressure and radiation resistance.
Based on ball valve sealing principles and technologies, our innovative single-seat high-performance butterfly valves are available in wafer type and lug type. Designed to achieve more reliable sealing driven by medium pressure, the valves integrate compensation for wear, differential pressure and temperature changes, and realize bidirectional sealing with low operating torque and easy maintenance.
The design of eccentric shaft and offset disc ensures only brief contact and perfect fitting between disc and seat when closed, while the disc completely separates from the sealing seat during opening, effectively extending the valve service life.
N-J VALVE CO.,LTD. introduces, absorbs and develops world-class valve design and manufacturing technologies. By continuously applying new materials, new processes and new technologies, we improve the precision and quality of components, ensure overall product performance, enhance the market competitiveness of N-J products, and meet the requirements of various working conditions from customers.