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JiaShan Yongbang Sealing Parts Co., Ltd. specializes in the design, manufacturing, and export of fluid machinery seals, with its production and operation base located in Jiashan County, Zhejiang, China. We are a manufacturing-oriented company dedicated to the research, development, and production of mechanical seals and sealing components. For many years, we have focused on industrial sealing applications, providing customers with reliable, durable, and precision-engineered seal products based on real operating conditions and specific application requirements.
The company has long focused on sealing applications across various industrial fields, including breweries, textile industries, and water treatment scenarios, gradually establishing a diverse product system centered on metal bellows seals, seal faces, and single spiral spring seals. Our current product range includes metal bellows seals, polytetrafluoroethylene bellows seals, OEMPump seals, seal faces, dry gas seals, and various sealing components. These products utilize high-quality raw materials—including carbon, CER ceramics, silicon carbide, and TC alloy—ensuring durability and stability under different operating conditions.
With 2 dedicated R&D engineers and a commitment to annual new product development, Yongbang actively undertakes customized mechanical seal manufacturing, providing tailored solutions according to specific customer needs. We hold a 5.0 out of 5 supplier rating and SGS audit certification No. QIP-ASI2531845, verifiable immediately. Average lead time is within 15 workdays, with Shanghai Port and Ningbo Port as our nearest gateways serving both domestic and international markets.
Yongbang Sealing focuses on the design, manufacturing, and application matching of fluid machinery seals, serving equipment manufacturers, industrial end users, and distribution partners. Our work is not limited to the delivery of individual seal products; instead, we address complex sealing challenges, demanding operating conditions, and long-term reliability requirements faced by customers, providing executable sealing solutions tailored to specific applications.
In industries such as breweries, textile industries, and various water treatment scenarios, mechanical seals often operate under different pressure conditions, temperature variations, and media types. In response to these application challenges, Yongbang combines mature product platforms with engineering experience to conduct systematic evaluations covering seal type selection, material matching, structural design, and parameter configuration. Our expertise in high-performance materials—including carbon, CER ceramics, silicon carbide, and TC alloy—helps customers reduce leakage risks, improve equipment stability, and maintain controllability throughout project delivery and usage.
By integrating standard products with comprehensive customization support, we help customers reliably integrate sealing solutions into their pumps or systems, enabling stable long-term operation and meeting practical process and production requirements. Whether working from samples, design drawings, or conceptual requirements, Yongbang delivers precision-engineered seals that perform.
Yongbang Sealing specializes in fluid machinery seals, combining precision engineering with flexible manufacturing. We have developed a robust material system covering carbon, CER ceramics, silicon carbide, and TC alloy, ensuring durability across metal bellows seals, PTFE bellows seals, and single spiral spring seals.
With 2 dedicated R&D engineers and annual new product launches, we offer full customization from samples and design drawings to minor adjustments. Our workshop is equipped with CNC lathes, CNC machines, sawing machines, and drilling machines, and all finished products undergo 100% visual and functional inspection. We hold a 5.0 out of 5 supplier rating and SGS audit certification No. QIP-ASI2531845, verifiable immediately.
Average lead time is within 15 workdays for both peak and off seasons. We serve breweries, textile industries, and water treatment applications, with Shanghai Port and Ningbo Port as our nearest gateways. Choose Yongbang for quality seals, tailored solutions, and reliable delivery.
Yongbang specializes in the design, manufacturing, and export of mechanical seals for industrial pumps, mixers, compressors, and rotating equipment. Our product range covers cartridge seals, component seals, metal bellows seals, submersible pump seals, and API 682 engineered seals — with over 10 million modular configurations spanning shaft sizes from 10mm to 300mm. We supply seal distributors in 104 countries with both standard catalog products and application-specific solutions, backed by cross-reference compatibility with John Crane, Burgmann, Flowserve, and other major brands.
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Over 56% of our production is dedicated to custom-engineered seals. Send us a drawing, a sample, or your operating parameters — our engineering team provides a detailed technical proposal within 48 hours. Our CAD/CAM-integrated design workflow connects directly to 9-axis CNC machining centers, enabling us to move from concept to finished prototype in 15 to 25 business days. Whether you need a material upgrade on a standard model, a dimensional modification for a non-standard pump, or a completely new seal design, we manufacture it in-house with the same quality controls applied to our catalog products.
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Every seal passes through a multi-stage inspection process: incoming raw material verification for density and hardness, in-process dimensional checks during CNC machining, seal face flatness measurement to within 2 light bands (0.00058mm), and final performance validation on dynamic test benches and static pressure rigs. Our quality system is audited by Intertek and SGS, and our API 682 compliant products meet ISO 21049 requirements. Material certifications, test reports, and dimensional inspection records are available upon request for every shipment.
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We maintain 6 months of rolling inventory on standard catalog seals, enabling 3 to 5 business day shipment on stock items. Custom-engineered orders ship within 15 to 25 business days depending on complexity. Our current on-time delivery rate stands at 98.7% across all order types. Located in Jiashan, Zhejiang — within 120km of both Shanghai Port and Ningbo Port — we offer competitive freight options for global distribution. Our sales team responds to technical inquiries within 24 hours with seal selection guidance, cross-reference verification, and competitive distributor pricing.
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