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.
