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Ningbo Bote Gasket Co., Ltd., operating as ryseals.com, is a leading Chinese manufacturer of high-performance spiral wound gaskets, metal gaskets, SWG inner and outer rings, and advanced sealing materials since 1992.
Trusted manufacturer of industrial sealing solutions with over 30 years of experience and global export reach.
Founded in 1992 as Cixi Sealing Spacer Material Factory, we evolved into Ningbo Bote Gasket Co., Ltd., a globally recognized manufacturer of high-integrity sealing products. Our export subsidiary, Ningbo Guangyi Sealing Material Co., Ltd., established in 2000, drives international sales and technical service.
With over 20,000 square meters of manufacturing space and a team of 101–500 professionals—including 11–20 R&D engineers—we deliver precision-engineered gaskets and packing materials for the petroleum, shipbuilding, metallurgy, chemical, and machinery industries.
1992
Founded
30+
Years Experience
100M+
Annual Sales (USD)
20K
m² Facility
High-performance sealing solutions engineered for reliability and durability.
BT-SWG series, ideal for flange sealing in pipelines and pressure vessels.
Precision rings for enhanced stability and centering in spiral wound gaskets.
Metal core with flexible sealing layers for high-pressure and high-temperature applications.
Elastic metal gasket with excellent recovery and vibration resistance.
Solid metal ring gasket for high-pressure oil and gas applications.
Environmentally safe alternative with high thermal and chemical resistance.
High-temperature resistant gasket for automotive exhaust systems.
Flexible, high-resilience seal for exhaust manifolds and turbo systems.
Compliant with ASME B16.20 for critical industrial applications.
High-purity PTFE filler tape for spiral wound gasket manufacturing.
Compact, high-performance seal ring for motorcycle exhaust systems.
High-strength, heat-resistant packing with or without PTFE.
Engineered for performance, reliability, and global compliance.
ISO 9001, ISO/TS 16949, and ASME compliant manufacturing processes.
Serving markets in North America, Europe, South America, and Asia.
Fully automated lines with unique technology for consistent quality.
Tailored solutions and private labeling available upon request.
30+
Years in Business
100M+
Annual Revenue (USD)
20K
m² Production Area
41–50%
Export Ratio
We use high-quality stainless steel (304, 316, etc.) for the metal winding and flexible graphite, PTFE, or non-asbestos filler materials depending on the application requirements.
Yes, we provide OEM services and can manufacture gaskets to your exact specifications, including non-standard dimensions and materials.
Our products are exported to North America, Western and Eastern Europe, South America, Southeast Asia, the Middle East, and Oceania.
We are certified under ISO 9001, ISO/TS 16949, and comply with ASME, JIS, and DIN standards for gasket manufacturing.
Reach out for quotes, technical support, or OEM inquiries.
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