Seals

　　Hydraulic systems are integral to the operation of steel plants, powering a range of heavy machinery, from presses to continuous casting machines. Hydraulic cylinders, in particular, are pivotal in controlling movement and force in various processes, including mold oscillation, rolling mill adjustments, and material handling. However, the efficiency and longevity of these hydraulic cylinders largely depend on the seals that keep hydraulic fluids contained and protect the internal components from contamination. 　　In the context of steel plants, where high pressures, temperatures, and harsh operating conditions are the norm, the selection of hydraulic cylinder seals becomes a crucial factor in ensuring smooth operations and minimizing downtime. Let’s explore the different types of seals commonly used in steel plant hydraulic systems. 　　1. Rod Seals 　　Rod seals are placed on the piston rod of a hydraulic cylinder and are responsible for maintaining the pressure of the hydraulic fluid while preventing the leakage of oil. These seals also protect the cylinder from external contaminants such as dust, dirt, or steel shavings. 　　Typically, nitrile rubber (NBR), polyurethane (PU), or fluorocarbon (FKM) are used for these seals due to their resistance to both high temperatures and abrasion. In steel plants, where the ambient temperature and friction levels are often extreme, FKM seals are commonly used due to their superior thermal stability. 　　2. Piston Seals 　　Piston seals prevent hydraulic fluid from leaking through the piston, ensuring that the pressure generated inside the cylinder is maintained. In high-pressure applications typical of steel plants, these seals are often designed with dual-lip or quad-ring configurations to enhance sealing performance and durability. 　　For materials, NBR and HNBR (hydrogenated nitrile rubber) are widely used because of their ability to withstand moderate to high pressure and their resistance to wear. However, in environments where extreme temperatures or exposure to chemicals (such as hydraulic oils) is present, FKM and PTFE (polytetrafluoroethylene) seals are preferred due to their enhanced chemical resistance and high-temperature tolerance. 　　3. Wiper Seals 　　Wiper seals, also known as scraper seals, are essential in steel plants for preventing external contaminants, such as slag, dust, and moisture, from entering the hydraulic system. These seals are typically installed at the rod- end of the cylinder. 　　The primary function of the wiper seal is to “wipe” off debris from the piston rod as it extends or retracts, maintaining the cleanliness of the hydraulic cylinder. Polyurethane (PU) and rubber-metal composites are often used for wiper seals, as they offer good abrasion resistance and can perform under harsh conditions. 　　4. Bearings and Back-up Rings 　　In some steel plant hydraulic cylinders, bearings and back-up rings are used alongside primary seals to support the hydraulic piston and prevent excessive wear. Bearings are used to support radial forces, while back-up rings help prevent extrusion of seals under high-pressure conditions. 　　PTFE is often the material of choice for back-up rings due to its low friction properties and resistance to chemical attack. For bearings, bronze or high-strength steel is frequently utilized in combination with seals to ensure long-term performance under heavy-duty operations. 　　5. Valve Seals 　　In certain hydraulic systems, valve seals are used to ensure proper flow control and pressure regulation. These seals are critical in maintaining the integrity of the fluid passage in the valve assembly. For steel plant applications, O-rings, lip seals, and V-rings are commonly used in valve systems. 　　The material selection for valve seals largely depends on the fluid compatibility, pressure requirements, and temperature tolerance. Nitrile rubber (NBR) is typically chosen for general-purpose use, while FKM is preferred in systems exposed to high temperatures or aggressive chemicals. 　　Key Considerations for Seal Selection in Steel Plant Hydraulics 　　When selecting hydraulic seals for steel plant applications, several factors must be considered: 　　Temperature Range: Seals must be able to handle high temperatures typical in steel production environments, which can reach up to 200°C or more. 　　Chemical Resistance: Many steel plant processes involve exposure to aggressive chemicals and lubricants, so seals must be resistant to chemical attack. 　　Pressure and Load Requirements: Hydraulic cylinders often operate under high pressure, and seals must be able to maintain integrity under such conditions. 　　Contamination Resistance: Seals must be able to withstand contamination from steel dust, slag, and other particles without failing. 　　The role of hydraulic cylinder seals in steel plants is far more than just a mechanical function—they are integral to the efficiency and reliability of the entire hydraulic system. Understanding the different types of seals, from rod seals to wiper seals and piston seals, allows plant engineers and maintenance teams to make informed decisions about sealing solutions.

Minimum Order: 100

Every tunneling project begins with the silent strength of engineering beneath the ground. While the spotlight often falls on the massive cutterheads of shield machines, few stop to consider what keeps the operation stable and leak- free—sealing systems. DEDE provides general parts and also produces seals that meet the specific needs of underground construction. This includes abrasion management, temperature endurance, and fluid resistance, all packed into precision- engineered sealing profiles. Whether facing groundwater intrusion or high rotation speeds, these seals are developed to perform under sustained mechanical and environmental stress. Manufacturer Direct Supply—What It Means for You One notable aspect of DEDE's business model is its direct supply approach. This eliminates intermediate channels and allows clients to receive sealing components straight from the production floor. The result? More predictable lead times, easier technical communication, and reliable product traceability. This model supports large infrastructure contractors and machine repair teams alike, especially when working with TBMs that demand frequent seal replacements or unique dimensions. Durable Performance for Shield Machines The sealing rings produced by DEDE are specifically crafted for use in shield tunneling systems, including earth pressure balance (EPB) machines and slurry TBMs. These machines operate under substantial axial and radial pressure, often encountering abrasive soil and fluid-laden environments. To meet these conditions, DEDE applies rubber compounds such as FKM and HNBR, combined with fabric reinforcement or metal frameworks, depending on the function. Lip-type configurations and grooved geometries are designed to prevent internal leakage while withstanding shaft misalignment or unexpected pressure spikes. These seals are not standardized across machines. Instead, DEDE offers customization based on shaft diameter, housing structure, rotation speed, and lubricant exposure, ensuring a functional fit rather than a forced compromise. Beyond Just a Seal—An Integrated Component Within a tunnel boring system, a sealing ring does more than stop leaks. It isolates internal systems, protects high-precision bearings, and helps maintain pressure balance within the machine. DEDE’s seals are tested to retain functionality even after long intervals between inspections, reducing the risk of emergency shutdowns during active tunneling. In addition, some designs incorporate dust lip structures and multi-material composite layers to further extend lifespan, especially when working in sediment-heavy strata.

Minimum Order: 100

n the world of tunneling and underground construction, tunnel boring machine (TBM) face some of the harshest operating environments. Between high-pressure slurry, friction from rock and soil, and the extreme mechanical loads of constant motion, the integrity of each component matters. Among these, the sealing elements—often overlooked—play a crucial role in ensuring efficiency and equipment longevity. One of the most frequently encountered challenges is seal wear and thermal degradation. This is where wear-resistant and high-temperature-resistant tunnel boring machine sealing rings step in. The Material Matters Unlike general-purpose seals, the sealing components for tunnel boring machine are typically crafted from specialized materials such as fluororubber (FKM), HNBR, or PTFE-composite blends, depending on the application. These materials are selected for their resistance to abrasion, swelling, and temperature deformation—ensuring they remain stable under both thermal and chemical stress. In high-speed rotation or hydraulic pressure environments, traditional sealing solutions may harden, crack, or degrade over time. But engineered compounds in tunnel boring machine seals are designed to maintain elasticity, surface integrity, and sealing performance across extended operation cycles. Design Beyond the Surface The geometry of tunnel boring machine sealing rings often incorporates multi- lip structures with integrated dust-exclusion features. These are not simply cosmetic additions. In practice, they create multiple layers of defense, protecting internal components from fine particles, mud ingress, and hydraulic fluid leakage. Furthermore, wear-resistant designs integrate reinforced support frames, often using stainless steel or brass inserts, to provide dimensional stability. This reinforcement prevents distortion during installation and operation, maintaining consistent pressure against the shaft or bore. Real-World Applications In slurry TBMs or earth pressure balance machines, such seals are typically applied in the cutterhead drive, main bearing areas, and hydraulic systems. Each of these zones operates under different stress conditions, requiring seals that not only tolerate but adapt to varying loads, misalignments, and temperature spikes. It is not unusual for a single tunnel boring machine to require several different types of seals—each optimized for its local mechanical and environmental demands. Considerations Before Selection When selecting a sealing solution for shield tunneling applications, several factors need to be assessed: Working temperature range: Will the seal face ambient fluctuations or high sustained heat? Exposure to slurry or chemicals: Are there aggressive agents that could corrode or swell the seal? Installation space: Does the design demand compact sealing solutions or allow for larger profiles? Maintenance intervals: How often will the machine undergo servicing? A properly selected seal does not merely protect a single component—it helps prevent downtime, maintain pressure stability, and extend the overall service life of the equipment.

Minimum Order: 100

Cassette oil seals are specialized sealing solutions developed for use in machinery that operates in environments where dust, dirt, water, and other contaminants pose a significant risk. Unlike standard rotary shaft seals, cassette seals integrate multiple sealing lips, a dust barrier, and sometimes a pre-lubricated internal cavity. This structure enhances sealing reliability and extends service life under harsh conditions. This article explores which types of machinery require cassette oil seals, explains why they are selected, and provides practical insights for engineers and maintenance professionals. Machinery That Commonly Uses Cassette Oil Seals 1. Agricultural Equipment Machines such as tractors, combine harvesters, seeders, and sprayers work in open fields where exposure to mud, water, and crop debris is constant. Cassette oil seals are commonly installed in wheel hubs, axles, and gearboxes to protect rotating parts and ensure smooth operation over long working hours. 2. Construction Machinery Excavators, backhoes, loaders, and bulldozers are exposed to gravel, soil, and vibrations during operation. Cassette seals help prevent grit and moisture from damaging internal components, especially in swing motors, wheel hubs, and hydraulic systems. 3. Mining and Quarry Equipment Equipment like drilling rigs, crushers, and haul trucks must withstand heavy- duty usage in abrasive environments. Cassette oil seals in these machines reduce the risk of bearing failure and fluid leakage in gearboxes and drive systems. 4. Heavy-Duty Trucks and Trailers Cassette seals are often used in truck axle systems, wheel ends, and braking assemblies, where they resist the effects of road debris, water, and temperature fluctuations, contributing to extended maintenance intervals. 5. Forestry and Logging Machinery Machines used in logging operations face exposure to wood chips, sap, and rough terrain. Cassette seals help protect gear mechanisms and wheel bearings from contamination, especially in harvesters and skidders. 6. Industrial Machinery In some cases, cement mixers, crushers, and conveyors used in dusty plants also benefit from cassette seals to maintain cleaner lubrication systems and prevent premature wear. Frequently Asked Questions Q1: Why are cassette seals preferred over standard oil seals in heavy equipment? A: Cassette seals offer multi-lip protection and are pre-assembled, reducing installation errors. They also resist contamination better and last longer in rugged environments. Q2: Are cassette seals only used in mobile equipment? A: While they are most common in mobile and off-road machines, cassette seals can also be applied in fixed industrial machinery exposed to high levels of dust or moisture. Q3: Can a standard oil seal be replaced with a cassette seal? A: In some cases, yes—but shaft compatibility, space constraints, and seal dimensions must be carefully evaluated. A cassette seal may offer better performance if properly fitted. Q4: What maintenance benefits do cassette seals offer? A: Their robust design helps reduce unplanned downtime and extends the interval between seal replacements, especially in equipment where frequent maintenance is difficult. Cassette oil seals are widely used in machinery that operates under tough and unpredictable conditions. From agriculture and construction to mining and transportation, these seals provide reliable protection against contaminants and wear. Understanding which machines benefit from cassette seals allows for more effective sealing solutions, helping to ensure long-term equipment reliability and reduced maintenance needs.

Minimum Order: 100

In the demanding world of heavy machinery, equipment such as excavators and concrete mixers operate in harsh, abrasive, and high-load environments. To ensure long-term reliability and protect internal components, high-quality sealing solutions are essential. Among the most commonly used are NBR (Nitrile Rubber) and FKM (Fluorocarbon Rubber) oil seals, designed for high precision and industrial durability. This article focuses on how these materials are applied in sealing systems for excavators and concrete mixers, and what factors to consider when selecting the right oil seals for these machines.

Minimum Order: 100

In the field of industrial automation and machinery, pneumatic seals are essential components that ensure air-tight operation in systems powered by compressed air. Whether used in pneumatic cylinders, valves, or actuators, these seals play a critical role in maintaining performance, reducing leakage, and enhancing the efficiency of equipment. For manufacturers, maintenance providers, and distributors, sourcing pneumatic seals in bulk is a practical choice that supports cost efficiency and consistent supply. This article explores the key features of pneumatic seals, their application in industrial machinery, and answers frequently asked questions to assist in informed purchasing decisions. Understanding Pneumatic Seals Pneumatic seals are designed to contain pressurized air within a system while preventing external contaminants like dust or moisture from entering. Unlike hydraulic seals, which must withstand high fluid pressures, pneumatic seals are optimized for lower pressures but higher speeds and more frequent cycles. Common types of pneumatic seals include: Rod seals – prevent air from escaping around the rod during extension or retraction Piston seals – maintain air pressure between chambers within a cylinder Wiper seals – remove debris from the rod surface before it enters the system O-rings and backup rings – used in static or low-motion sealing points Material Options for Pneumatic Seals Choosing the right material is essential for sealing performance and service life. Typical options include: NBR (Nitrile Rubber): Good for general-purpose applications, offering basic oil and air resistance PU (Polyurethane): Known for high wear resistance and mechanical strength in dynamic applications FKM (Fluorocarbon): Suitable for higher temperature and chemical exposure EPDM: Often used where resistance to steam or water-based fluids is required Each material has its strengths depending on temperature, speed, chemical compatibility, and application requirements. Why Bulk Purchasing Makes Sense For industrial users, buying pneumatic seals in bulk offers multiple advantages: Lower cost per unit through volume discounts Reduced downtime by maintaining inventory for quick replacement Consistent product availability to support high-volume production or maintenance schedules Customization options available for OEM or private label requirements Bulk options typically include a mix of standard sizes and profiles used in the most common pneumatic components. FAQs: Pneumatic Seal Bulk Supply Q1: Are pneumatic seals standardized across different brands? A: Many seals follow ISO or DIN dimensions, but some machines require custom seals. It's important to check size and groove specifications before placing a bulk order. Q2: What should I consider when choosing a supplier? A: Look for suppliers who provide material certifications, dimensional accuracy, and stable lead times. Technical support and customization services are also helpful. Q3: Can the same seals be used for both hydraulic and pneumatic systems? A: Not always. Pneumatic seals are designed for air systems and may not handle the pressure or chemical exposure found in hydraulic environments. Q4: How do I store pneumatic seals for long-term use? A: Keep them in a cool, dry place away from sunlight and ozone-generating equipment. This helps prevent premature aging of the rubber. Pneumatic seals may be small components, but they have a significant impact on the efficiency and reliability of industrial machinery. Choosing the correct material and seal design—and securing them in bulk—can reduce long-term maintenance costs and ensure smoother operations. If your business relies on pneumatic systems, consider partnering with a trusted supplier who understands your industry and offers reliable bulk sealing solutions tailored to your operational needs.

Minimum Order: 100

DEDE Supplies is proud to offer a wide range of high-quality excavator seals and industrial earthmoving machinery seals. Our seals are designed to withstand the rigors of heavy-duty construction and excavation projects, providing reliable protection for your equipment and ensuring smooth operation. We understand the importance of having durable and reliable seals for your machinery, which is why we source our products from trusted manufacturers and rigorously test them to ensure they meet our high standards. Whether you need seals for excavators, bulldozers, or other earthmoving equipment, we have the right solution for you. Our seals are made from premium materials that are resistant to wear, tear, and extreme conditions, so you can trust that they will deliver long-lasting performance in the toughest environments. With a focus on quality and durability, DEDE Supplies is your go-to source for all your excavator and earthmoving machinery seal needs. In addition to our top-notch products, we also provide exceptional customer service and support. Our knowledgeable team is here to assist you with finding the right seals for your specific needs and to answer any questions you may have. We are dedicated to ensuring your complete satisfaction with every purchase. Don't let worn-out or inferior seals compromise the performance of your machinery. Trust DEDE Supplies for reliable excavator seals and industrial earthmoving machinery seals that you can count on. Contact us today to learn more about our products and how we can help you keep your equipment running smoothly.

Minimum Order: 100

In industrial applications where oil, grease, and hydraulic fluids are commonly used, the choice of sealing material plays a critical role in equipment reliability and performance. DEDE as a trusted manufacturer of industrial sealing components, proudly presents the advantages of NBR (Nitrile Butadiene Rubber) seals — one of the most popular and versatile materials in the sealing industry today. What Makes NBR Seals a Preferred Choice? 1. Outstanding Oil Resistance NBR is especially valued for its excellent resistance to petroleum-based oils and fuels. Whether used in engines, gearboxes, or hydraulic systems, DEDE's NBR seals maintain sealing integrity and elasticity even after long exposure to lubricants and transmission fluids. 2. Wide Operating Temperature Range DEDE NBR seals can operate efficiently between -40°C to +125°C, making them suitable for a variety of mechanical environments. This thermal stability allows them to perform reliably in both low- and medium-temperature applications. 3. Excellent Physical Strength NBR offers good tensile strength and abrasion resistance, which are critical for dynamic sealing environments. This ensures longer service life, especially in systems where continuous motion or pressure fluctuations are involved. 4. Cost-Effective Material Compared to higher-end materials like FKM or PTFE, NBR is more economical without sacrificing essential performance characteristics. For most general- purpose sealing tasks, DEDE's NBR seals offer a perfect balance between cost and efficiency. 5. Versatility in Applications Due to its chemical and physical properties, DEDE is NBR seals are widely used in: Automotive engines and drivetrains Hydraulic and pneumatic systems Agricultural and construction machinery Pumps, compressors, and gearboxes 6. Customization Flexibility DEDE offers NBR seals in various profiles and sizes, such as TC, SC, VC, and TB types, and supports OEM customization. Whether you need a standard part or a seal tailored to specific machinery, DEDE can deliver with precision and consistency. Environmental Considerations With growing attention to environmental sustainability, DEDE continues to optimize its NBR formulation to reduce VOC emissions and improve recycling potential, aligning product development with modern green standards. If your machinery requires reliable sealing in oil-rich environments without the need for extreme temperature or chemical resistance, DEDE's NBR seals are an excellent choice. They deliver dependable performance, mechanical strength, and cost efficiency—backed by DEDE is commitment to quality manufacturing and professional service. Get in touch with DEDE today to explore the full range of NBR sealing solutions, request samples, or discuss your specific application requirements.

Minimum Order: 100

For businesses seeking cost-effective, high-performance sealing solutions, bulk purchasing oil seals from China has become a strategic choice. With mature manufacturing systems, competitive pricing, and strong global logistics, Chinese seal manufacturers are increasingly favored by OEM, distributors, and industrial procurement teams. Among them, professional suppliers such as NQKSF stand out for their stable supply capabilities, strict quality control, and efficient service. Why Choose Chinese Manufacturers for Bulk Oil Seal Procurement? China has developed into one of the world's major hubs for industrial sealing components. Leading manufacturers offer a complete range of oil seals made from NBR, FKM, PU, PTFE, and other engineered rubber materials suitable for automotive, hydraulic, agricultural, and general machinery applications. Key advantages include: Stable and Scalable Supply Chain Chinese seal factories are equipped with advanced production lines and efficient material sourcing channels. Whether your order requires 10,000 or 1,000,000 units, manufacturers can fulfill bulk requirements without delays, even for customized or special-spec products. Diverse Product Range From TC, SC, TB, TG, VC, V-Ring, Bonded Seals to custom-designed oil seals, Chinese manufacturers provide full solutions for rotating, reciprocating, or static sealing needs. Multi-material options and design flexibility meet diverse application demands. Strict Quality Control Reliable suppliers follow ISO 9001 or IATF 16949 standards, using precise molding, metal reinforcement, and surface treatment techniques. Each batch undergoes hardness, temperature, pressure, and leak resistance testing to ensure consistent quality in mass production. Cost-Effective Pricing Lower labor and raw material costs allow Chinese manufacturers to offer high- quality oil seals at competitive prices, which is ideal for distributors or companies looking to optimize procurement budgets without compromising performance. Global Shipping and Support With mature export experience, established manufacturers offer fast international shipping, multilingual communication, and after-sales support. OEM labeling, packaging customization, and flexible MOQ further enhance supply convenience. Applications and Industry Reach Bulk oil seal orders from China are commonly used in: Automotive manufacturing (engine, gearbox, axle seals) Hydraulic and pneumatic systems Agricultural machinery Construction equipment Chemical processing equipment Chinese suppliers understand global market standards and application nuances, helping customers select the right materials and designs for each system. Partnering with the Right Supplier To ensure a smooth bulk purchasing experience, it is essential to work with a reputable manufacturer with export capabilities, production certifications, and a proven supply history. Brands like NQKSF combine production expertise with responsive service, ensuring long-term cooperation and performance assurance. If your business demands large volumes of high-quality oil seals, bulk purchasing from a trusted Chinese seal manufacturer offers a reliable, scalable, and economical solution. With consistent production capacity, flexible customization, and global export support, Chinese suppliers are well- positioned to meet your industrial sealing needs. Contact us today to discuss bulk pricing, request samples, or schedule a production consultation for your specific oil seal requirements.

Minimum Order: 100

In the world of industrial machinery, reliable sealing components are essential to maintain performance, prevent leaks, and extend the lifespan of equipment. The NQKSF brand is proud to offer a full range of high-quality, durable rubber sealing products designed to meet the rigorous demands of modern industries. With years of experience in manufacturing and global supply, NQKSF has become a trusted name among equipment manufacturers, engineers, and procurement professionals worldwide. Product Overview NQKSF rubber seals are built with a strong focus on durability, precision, and compatibility with harsh operating environments. Whether used in hydraulic systems, automotive engines, compressors, or heavy machinery, these seals ensure tight, consistent sealing performance even under pressure, friction, and chemical exposure. Key Material Options NBR (Nitrile Butadiene Rubber): Excellent oil and fuel resistance Operating temperature: -40°C to +125°C Commonly used in automotive and hydraulic sealing systems FKM (Fluorocarbon Rubber): Superior heat, oil, and chemical resistance Operating temperature: -20°C to +250°C Ideal for harsh industrial or chemical environments EPDM, Silicone, and PU: Selected based on application needs such as weather resistance, flexibility, or abrasion tolerance Why Choose NQKSF Rubber Seals? Long-Term Durability: All NQKSF seals are tested for resistance to aging, cracking, deformation, and wear, ensuring reliable long-term operation. Precision Engineering: Manufactured with high dimensional accuracy, ensuring perfect fit and optimal sealing performance in dynamic or static conditions. Versatile Applications: Suitable for a wide range of sectors, including automotive, construction equipment, agriculture, oil & gas, and general machinery. Custom Production: We offer OEM/ODM services, including size customization, logo printing, and packaging options to match client-specific requirements. Performance Highlights Leak-proof sealing under high pressure and temperature Excellent resilience and rebound elasticity Low compression set, even after long service hours Strong compatibility with various lubricants and industrial fluids Global Supply and Support NQKSF has built a strong international presence, supplying rubber seals to partners in Europe, Southeast Asia, North America, and beyond. We maintain a commitment to fast delivery, quality control, and technical support, helping clients reduce downtime and optimize system performance. Conclusion For businesses that depend on reliable sealing components, NQKSF rubber seals are the smart choice. With advanced materials, consistent manufacturing quality, and excellent resistance to industrial stressors, NQKSF products deliver value in both performance and longevity. Reach out today for pricing, sample requests, or to explore custom sealing solutions tailored to your industry needs.

Minimum Order: 500

DEDE brand offers a full range of premium industrial seals that are designed to withstand extreme operating conditions, ensuring reliability, safety, and long- term efficiency. Whether used in high-pressure hydraulic systems, high-speed rotating shafts, or chemically aggressive environments, DEDE seals deliver consistent sealing performance with minimal maintenance requirements. Why Choose DEDE Industrial Seals? DEDE seals are engineered with a clear focus on longevity, material integrity, and functional precision. Each product is the result of advanced manufacturing processes, strict quality control, and in-depth research into application- specific needs. Core Advantages: High-Quality Materials: DEDE seals are available in a variety of materials, including NBR (Nitrile Rubber), FKM (Fluorocarbon Rubber), EPDM, Silicone, and PTFE, allowing for compatibility with oils, fuels, chemicals, and high-temperature or high- pressure conditions. Metal-Reinforced Construction: Many DEDE oil seals are designed with internal metal skeletons, providing excellent shape retention and structural stability, even under mechanical stress or fluctuating loads. Wide Application Range: Suitable for use in automotive systems, hydraulic and pneumatic equipment, agricultural machinery, gearboxes, compressors, pumps, and more. Precision Manufacturing: DEDE applies advanced molding techniques and strict dimensional control to ensure a perfect fit and leak-proof sealing, minimizing downtime and reducing maintenance costs. Custom Solutions Available: DEDE supports OEM and bulk customization for industrial clients, offering tailored solutions that meet specific performance requirements in various sectors. Performance Highlights Temperature Resistance: Depending on the material, seals can operate in environments ranging from -40°C to +250°C. Pressure Endurance: Engineered to handle high system pressures without deformation or extrusion. Chemical Compatibility: Excellent resistance to oils, fuels, hydraulic fluids, and corrosive substances. Friction & Wear Control: Low-friction surface finish ensures smooth motion and extended seal lifespan. Reliable Partner for Global Industries With a commitment to quality and innovation, DEDE has become a trusted supplier to clients across Europe, Asia, and the Americas. The brand has earned a reputation for consistency, fast delivery, and strong technical support, making it a preferred partner for long-term supply contracts and industrial procurement. If your business relies on machinery that must operate smoothly under harsh conditions, DEDE industrial seals provide the reliable protection your systems need. Backed by expert engineering, quality materials, and a dedication to performance, DEDE seals are a smart investment for reducing downtime, extending equipment life, and improving overall operational efficiency. Contact us today to learn more about DEDE’s full range of sealing solutions or to request a free quote for bulk or customized orders.

Minimum Order: 500

Looking for durable, high-performance oil seals capable of withstanding extreme temperatures and pressures? The DEDE High Temperature and High Pressure Oil Seal—crafted from NBR (Nitrile Butadiene Rubber) or FKM (Fluorocarbon Rubber) with an embedded metal skeleton—offers an optimal sealing solution for demanding industrial environments. Designed for OEMs, distributors, and maintenance professionals, this product is now available for wholesale orders with reliable quality assurance and competitive pricing. Product Overview The DEDE oil seal is engineered to deliver long-lasting sealing performance in applications involving both high pressure and elevated temperatures. With its precision-engineered metal-reinforced structure, it maintains excellent dimensional stability, even under thermal expansion or mechanical stress. This seal is ideal for high-speed rotating shafts, gearboxes, hydraulic systems, and industrial pumps. Key Material Options NBR (Nitrile Rubber): Temperature resistance: -40°C to +125°C Excellent resistance to mineral oils, hydraulic fluids, and mild chemicals Good wear and compression resistance Cost-effective for general high-pressure applications FKM (Fluorocarbon Rubber): Temperature resistance: -20°C to +250°C Exceptional heat, chemical, and oil resistance Suitable for aggressive environments (e.g., fuel systems, chemical plants) Higher durability in continuous high-temp operations Features and Advantages Metal Skeleton Reinforcement: Ensures rigid structure and installation precision Dual-Lip or Single-Lip Designs: Available according to sealing direction requirements High Pressure Resistance: Withstands internal system pressure fluctuations without deformation Thermal Stability: Maintains elasticity and sealing performance at elevated temperatures Custom Sizes & Branding: Support for OEM customization and large-batch bulk production Applications Hydrauli , c cylinders and pumps Automotive transmissions and engine components Oil and gas drilling machinery Chemical processing equipment Marine engines and turbines Heavy-duty agricultural and construction machinery Wholesale & Supply Capabilities As a professional supplier with global distribution capabilities, we offer flexible MOQ (Minimum Order Quantity), fast production lead time, and support for private labeling. Whether you're an importer, distributor, or equipment manufacturer, our DEDE oil seals are tested and proven for reliability across industries. The DEDE NBR/FKM skeleton oil seal with a combines temperature endurance, pressure resistance, and custom engineering, making it a reliable and cost- efficient solution for critical sealing applications. If your operations demand seals that won’t fail under harsh conditions, our high-temperature, high- pressure DEDE oil seals are your ideal choice. Contact us today for wholesale pricing, technical datasheets, or OEM customization services.

Minimum Order: 100

Are you in need of high-quality oil seals for your industrial or automotive applications? Look no further than our China Oil Seal Manufacturer! We are proud to supply a wide range of oil seals, including skeleton seal, NBR, FKM, and double lip metric oil seals, all designed to meet your specific sealing requirements. Our oil seals are manufactured using the latest technology and highest quality materials to ensure durability and reliability. Whether you need oil seals for heavy-duty machinery or precision automotive components, we have the right solution for you. Our products are designed to withstand harsh operating conditions, including extreme temperatures, pressure, and chemical exposure. In addition to our extensive product range, we also offer custom manufacturing services to meet your unique specifications. Our team of experienced engineers and technicians can work with you to develop custom oil seals that fit your exact requirements. With our commitment to quality and customer satisfaction, you can trust that our oil seals will deliver exceptional performance and longevity. We are dedicated to providing reliable sealing solutions that keep your equipment running smoothly and efficiently. Don't settle for subpar oil seals – choose our China Oil Seal Manufacturer for superior quality and exceptional value. Contact us today to learn more about our products and services and experience the difference that our oil seals can make for your operations.

Minimum Order: 500

In industrial machinery, automotive systems, and hydraulic equipment, sealing reliability is critical. DEDE offers a wide range of durable NBR and FKM oil seals designed to meet the demands of heavy-duty applications. Our products combine premium materials, precise manufacturing, and long service life, making them the ideal choice for customers who need dependable sealing performance with competitive wholesale pricing. High-Quality Materials for Maximum Efficiency DEDE oil seals are made from carefully selected materials to ensure long-term durability and resistance to extreme conditions: NBR (Nitrile Butadiene Rubber): Known for its excellent oil resistance, abrasion tolerance, and elasticity. NBR seals are suitable for general industrial use and perform well in temperatures ranging from –40°C to +125°C. They are commonly used in engines, gearboxes, and pumps that operate with standard oils and greases. FKM (Fluorocarbon Rubber): Designed for high-temperature and chemically aggressive environments. FKM oil seals resist fuel, synthetic oils, hydraulic fluids, and extreme heat up to +250°C. Ideal for high-speed rotating equipment, automotive engines, and industrial machinery operating in challenging environments. Engineered for Industrial Performance Our oil seals are available in a wide variety of sizes and configurations, including single-lip and double-lip designs. With reinforced metal skeletons and precision-molded sealing lips, DEDE oil seals maintain consistent pressure on rotating shafts, effectively preventing fluid leakage and the intrusion of contaminants. Each seal is tested for dimensional accuracy, surface hardness, and thermal resistance. This ensures every batch meets international industrial standards and functions reliably even in demanding applications. Wholesale Discounts and OEM Support DEDE supports bulk buyers and OEM clients with attractive wholesale discounts, fast delivery, and flexible customization. Whether you’re a distributor, a maintenance company, or a machinery manufacturer, we can provide: Large inventory of standard sizes in stock Custom production for special dimensions or performance needs Private labeling and branded packaging options Export-ready logistics and multilingual customer support Our competitive pricing does not compromise quality—each product is backed by DEDE’s rigorous quality control and technical expertise. Applications Across Multiple Industries DEDE NBR and FKM oil seals are widely used in: Automotive: Engines, transmissions, axles Industrial equipment: Compressors, pumps, gearboxes Agricultural machinery: Hydraulic systems, drive shafts Marine and energy sectors: Sealing under high pressure and harsh chemicals Whether the application involves speed, pressure, heat, or exposure to aggressive media, our seals offer a reliable barrier that protects your equipment and extends its lifespan. Choose DEDE for Trusted Sealing Solutions DEDE is committed to providing customers worldwide with durable, high- performance oil seals at competitive wholesale prices. Our NBR and FKM products reflect the latest in material science and seal engineering. With decades of manufacturing experience and a focus on quality and service, DEDE is your reliable partner in industrial sealing. Contact us today for samples, price lists, or to discuss your bulk order needs. We’re ready to deliver sealing solutions that keep your business running smoothly.

Minimum Order: 500