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Get to Know DEF SEALS

Safeguarding Industrial Safety, Earning Global Trust

Since its founding in 2004, DEF SEALS has been dedicated to one mission: protecting the safe operation of every piece of equipment with high‑performance sealing products. As a National High‑Tech Enterprise, we integrate R&D, manufacturing, sales, and technical services. From Guangdong, China, our products are now exported to more than 100 countries and regions, delivering full‑scenario, one‑stop sealing system solutions to key industries such as hydraulic equipment, construction machinery, coal mining machinery, metallurgical equipment, petrochemicals, marine, power, aviation, and new energy.

Why do global customers choose DEF SEALS? Strong Technology – We master core technologies in high‑performance sealing material formulations and structural design. Our product portfolio includes hydraulic seals, rotary seals, face seals, spring‑energized seals, guide rings, and more, meeting stringent requirements from conventional to extreme operating conditions. Stable Quality – Leveraging our National High‑Tech Enterprise platform, we have built a robust quality management system. Every product undergoes rigorous inspection to ensure industrial safety in every static and dynamic application. Efficient Service – With a fast‑response global sales and service network, we provide professional technical support and timely delivery assurance to customers in any time zone.

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2004

Established in

10000

Production Area

PRODUCTS

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Rubber

Engineering plastics

Sealed product

Friction plate

Fabric‑reinforced guide belt

Shaft Seal Series

What are multi-material composite rubber products? They refer to composite structural components formed by molding rubber together with one or more other materials in a mold, resulting in a tightly bonded assembly. In general, industrial structural components are assembled from multiple parts. Examples of composite rubber products include O-rings, rubber sealing rings, rubber sheets, rubber diaphragms, and metal‑encased rubber parts, among others.

Bolt Seal Series

Engineering new materials are essential raw materials for manufacturing high-performance seals. These materials exhibit superior properties and specialized functions; structural materials leverage their mechanical characteristics—such as strength, toughness, hardness, temperature resistance, and elasticity—to address sealing challenges under various operating conditions. Examples of engineering new materials include PTFE tubing, food-grade PTFE tubing, PU polyurethane tubing, PEEK, ultra‑high‑molecular‑weight PE, EPDM rubber, nylon, and phenolic‑impregnated fabrics. Regarding seal material performance, PTFE compounded with copper powder, carbon fiber, glass fiber, molybdenum disulfide, and graphite offers improved sliding behavior, a low coefficient of friction, excellent wear resistance, superior creep resistance, strong compressive strength, and outstanding extrusion resistance.

Pipe Material/Semi-finished Products Series

The product range of XinZhi Sealing’s hydraulic cylinder seals includes: O-rings, hydraulic seals, rotary seals, static and dynamic seals, cylinder seals, mechanical face seals, and more.

Wind power friction plate

Xin Zhi Sealing is a provider of sealing system solutions for wind energy. Its product portfolio includes brake friction pads, wear‑resistant pads, motor oil seals, sealing components, and wind‑turbine rubber plates. The friction pad BP‑K02‑03, developed by Xin Zhi Sealing, remains intact even after edge chipping or failure, thereby preventing fragmented material from scratching the yaw gear ring and ensuring continuous yaw guidance, thus avoiding abrasive contact between steel structural components.

Guide Ring Series

Guangdong Xinzhi Sealing is a leading manufacturer of fabric‑reinforced guide belts, offering a range of products including phenolic‑impregnated fabric guide belts (available in blue and red), wear‑resistant rings, and support rings. Our high‑quality products are bestsellers in 15 countries, including India, Europe, the United States, and Russia.

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