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Ningbo Zhongli John Seals Co., Ltd.

Address:Build #7-103, Qidi industrial Park, No.299 Siming East Road, Fenghua, Ningbo Zhejiang China 315504

Tel:+86 574 8891 1322

Fax:+86 574 8895 2096


General manager:+86 135 6633 2298(Mr. bill fang)

Sales Manager:+86 136 8580 9470(Mr. kerkevin)

Email : sales@zlseals.com           fang@zlseals.com

Web:  www.zlseals.com


A new material of Ningbo Zhongli John Seals Co., Ltd. won the national invention patent

In  December 2020, the new silicon carbide material for mechanical seals  newly developed by our company (an in-situ silicon carbide fiber  reinforced liquid phase sintered silicon carbide ceramic and its  manufacturing method) was an invention issued by the State Intellectual  Property Office patent certificate.

Since  the 1980s, silicon carbide materials have been widely used in the field  of mechanical seals. With the advancement of technology and the higher  and higher requirements of the working conditions of mechanical seals,  the use of pressureless sintered silicon carbide materials has become  more and more widely used. However, due to the complex production  process of traditional pressureless sintered silicon carbide sealing  materials, the sintering temperature is high. The output is low,  resulting in expensive SSIC and a long production cycle.

In  order to solve the problems of high production cost and long production  cycle of SSIC products, the company invested nearly 1 million U.S.  dollars in the past three years to conduct rigorous and effective  scientific research on this problem. With the careful guidance of a  doctoral professor at Ningbo University, we finally achieved success.


This  new SSIC material cuts the production time by half and reduces the  production cost by about 30%. It can use special production technology  to produce a complex structure of SSIC sealing ring, and the firing  shrinkage rate of this SSIC is stable, and the size is available, and  more importantly, the performance indicators of this SSIC fully meet the  current SSIC technical standards.


Because  it has the characteristics of low cost and short production cycle, it  is expected to obtain huge market benefits and will be welcomed by the  mechanical seal industry.


Our  company warmly welcomes the world's major mechanical seal manufacturers  to order and try this new low-price SSIC sealing material, and we will  supply it to you at a price 30% lower than the ordinary SSIC.