Lishi Sealing Tech (Ningbo) Co., Ltd.

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Zhejiang Linshi Sealing Technology Co., Ltd.

🇨🇳 China

1998

101-200 people

Manufacturer

Established brand

Own brand

Product customization

ODM manufacturer

Key customer

BOSCH

Key market

Asia

Description

Zhejiang Linshi Sealing Technology Co., Ltd. is a premier manufacturer specializing in high-performance rubber seals and diesel engine components. Established in 1998, the company has grown into a leading industry player with headquarters in Taizhou and two major production bases in Ningbo and Taizhou, spanning over 24,000 square meters. With a workforce of approximately 200 employees, the firm operates as a specialized ODM and contract manufacturer for global automotive leaders such as Bosch, Cummins, Delphi, and Caterpillar. The company's extensive product portfolio includes diesel engine fuel pump repair kits, common rail shims, injector O-rings, diesel filters, and turbocharger air pipes. These components are critical for fuel injection, braking, steering, and shock mitigation systems across the automotive, marine, and heavy machinery sectors. Notably, Linshi holds a 70% domestic market share for rubber sealing parts in engine fuel systems, with its O-ring series achieving industry-leading technical benchmarks. Operating under IATF 16949:2016 and ISO/TS 16949 quality standards, the company utilizes advanced production technology, including dust-free vulcanization workshops and automated molding machines equipped with voice-alarm monitoring systems. Linshi maintains strong R&D capabilities, offering customized solutions for silicone and fluorine rubber seals. With independent export rights and a significant presence in high-end international markets, the company continues to invest in smart factory automation to enhance production transparency and quality control.

Adjusting Gasket

Common Rail Shims Cummins Series

Adjusting Gasket

Common Rail Shims 120 Series

Adjusting Gasket

Common Rail Shims Denso Series

Ningbo Leap Seals Industry Co., Ltd.

🇨🇳 China

2003

11-50 people

Manufacturer/Trading Company/Service Company/Wholesaler/Distributor

Established brand

OEM manufacturer

ODM manufacturer

Own brand

Shipments

Key customer

MALAVAZI VEDACOES

Key market

Asia

Description

Ningbo Leap Seals Industry Co., Ltd., also known as China Ningbo Seal and Gasket Co., Ltd., is a prominent manufacturer and exporter of high-performance sealing solutions based in Ningbo, China. Established in 2003, the company has grown into a specialized provider of mechanical seals, gaskets, and industrial components, operating with ISO 9001 certification to ensure rigorous quality control standards. The company maintains a significant production capacity, capable of producing over 20,000 sets of complete mechanical seals and 100,000 sealing rings annually. Their extensive product portfolio includes elastomer bellows seals, O-ring seals, metal bellows seals, cartridge seals, and vessel seals. They also specialize in a wide range of gaskets, such as spiral wound, ring type joint (RTJ), kammprofile, and metal jacketed gaskets, alongside braided gland packings and PTFE products. These components are manufactured using high-grade materials including silicon carbide, tungsten carbide, industrial ceramics, stainless steel, and flexible graphite. Their products are engineered to meet international standards such as ASME, BS, JIS, EN, and DIN. As a terminal technology solver for mechanical seal faces, the company offers robust OEM and ODM capabilities, providing customized sealing rings, sleeves, and complex irregular parts based on client drawings. Their solutions serve a diverse range of industries, including petroleum, chemical processing, electric power, shipping, metallurgy, pharmacy, and food machinery. With a strong focus on international trade, Ningbo Leap Seals exports to major markets across North America, Europe, South America, and the Middle East, positioning itself as a reliable partner for both standard stock items and bespoke industrial sealing requirements.