NINGBO ZHONGLI JOHN SEALS CO., LTD. was founded in 1993 and has a history of more than 30 years. It is located in Ningbo, the birthplace of silicon carbide production in China. It is the earliest professional manufacturer of silicon carbide sealing materials in China. The company has a complete production line of
silicon carbide sealing rings (Silicon Carbide Ring),
tungsten carbide rings (tungsten carbide ring), and a complete
mechanical seal manufacturing production line. The company also has a mechanical sealing material research institute to provide customers with professional mechanical sealing materials and mechanical sealing product design, sampling, installation and product testing services. The company has passed ISO9001, European HORS and other product certifications and has a complete product quality management system.
The company has a complete production line of silicon carbide materials and tungsten carbide materials, as well as six large vacuum sintering furnaces, which can provide customers with drawings processing and provide high-quality sealing materials.
The company has complete mechanical seal manufacturing equipment, and can provide various special mechanical seal products from conventional mechanical seals to metal bellows, containerized mechanical seals, PTFE mechanical seals, etc., and undertake various technical services including special design business, sample processing business, and high-altitude installation business for customers. The company has a large number of advanced mechanical seals and mechanical seal material testing equipment to ensure that all products reach the international advanced level.
Our products are divided into two categories. One is to provide mechanical sealing products for various types of pumps including pipeline pumps, multi-stage pumps, fire pumps, centrifugal pumps, impurity pumps, submersible pumps, shielded pumps, magnetic pumps, vacuum pumps, chemical pumps, marine pumps, etc.; the other is to provide various types of sealing rings for mechanical seal manufacturers, such as SIC sealing rings, TC sealing rings, graphite sealing rings, etc. Our company has a complete range of products and can provide customers with a full range of products.
Our company is a national high-tech enterprise with 5 national invention patents and a large number of utility invention patents. We have passed ISO9001 system certification and European HORS certification.
