Seals

We were recently working with a mid-sized gearbox supplier who had issues with dirt entering their systems, even though they already used oil seals. They'd tried a few fixes — extra dust shields, better housing precision — but none stuck. What solved the problem? A simple VA-style V-ring seal. No housing modification, no rework. Just stretched it onto the shaft, and the issue disappeared. That's the kind of story we’ve heard more than once. It doesn’t matter if you're working on agricultural machinery, wind turbines, electric motors, or industrial arms. The VA/VS V-ring seal series works across the board — partly because it’s not trying to do too much. Just block out the junk and stay in place. The Role It Plays — Quiet but Critical VA/VS V-ring seal small, rubbery, and doesn’t look like much. But once you've had a bearing fail due to fine dust or water ingress, you realize what a tiny lip of rubber can prevent. The V-ring doesn’t press into the housing. It sits loosely on the shaft — and that’s the beauty of it. As the shaft turns, so does the V-ring, and its flexible lip maintains light contact with the counter face. That contact — soft as it may be — creates an effective seal, especially when speed increases. Centrifugal force starts to sling dirt and moisture away. In real usage, it’s what you'd call a first line of defense. It won’t hold pressure, and it won’t stop oil if there's a flood inside — but it will make sure the main oil seal doesn’t have to fight off grit or humidity on its own. VA and VS — Same Concept, Different Strengths we’ve supplies both VA and VS profiles, depending on where and how you're mounting. · VA is the classic. Slimmer, works where space is limited, and typically used on cleaner shafts or where loads are moderate. · VS, on the other hand, is a bit more rugged. Extra thick in the base, so it stays more stable when there's axial movement, vibration, or misalignment. We’ve seen VS rings used in mining conveyors where shaft conditions weren’t ideal — and yet, the seals held on for months without needing replacement. It's Not Just About Shape — Material Matters A customer once asked us, “Do I really need FKM for this?” Short answer: not always — but sometimes absolutely yes. Most VA/VS V-rings come in: · NBR (Nitrile rubber) — Handles oil well, affordable, works in most industrial environments with temps from -40°C to 125°C. · FKM (Fluoroelastomer) — Tougher, chemical-resistant, and survives in hot or chemically aggressive surroundings (up to 250°C). We typically recommend NBR for general motors, pumps, and gearboxes. But if you're working in a chemical plant, offshore equipment, or any setup that runs hot, FKM is the safer choice. Installation — Easier Than You’d Expect Here’s where the V-ring outshines traditional seals. You don’t need to disassemble the entire shaft assembly. There’s no press-fitting or bore matching. You just stretch it over the shaft, position it where needed, and the seal takes care of the rest. A drop of lubricant on the lip helps it settle smoothly against the counter face. That’s it. We’ve done installs in under five minutes. Some plants keep a few dozen on- hand just for emergency replacements — because it’s the kind of part you don’t think about until it’s gone, and then you wish you'd stocked more. Where VA/VS Rings Show Up (More Often Than You Think) · Electric motors — Particularly in workshops with fine dust or metal shavings. · Pump systems — Protecting internal oil chambers from external moisture. · Gearboxes — Especially on construction or agricultural equipment. · Wind turbines — Variable speed, exposed locations — the perfect V-ring scenario. · Robot joints or arms — Compact space, rotating shafts — check. What Makes DEDE a Reliable Source? We’ve seen plenty of suppliers over the years, and DEDE stands out for a few reasons: · Wide coverage — 10,000+ spec variants across seals, rings, gaskets, and more. · Fast fulfillment — We’ve had urgent VA-type rings shipped same-day. · Customization — Need a non-standard shaft size or want a hybrid compound? They’ll get it sorted. · Global presence — Used in 80+ countries, across industries from aerospace to energy. · Strong credentials — Recognized as a high-tech manufacturer and innovation- driven seal developer. We don’t just sell seals — we understand sealing. There’s a difference. V-ring not expensive. It’s not complex. And it doesn’t get in the way. But it protects — effectively. If your machinery has rotating shafts and you’re tired of grit, moisture, or premature oil seal wear, the VA/VS V-ring seal series from DEDE is a smart addition. Install once. Forget it for a long time.

Minimum Order: 500

In mechanical systems, we often assume a seal is just a passive part—rubber, maybe a spring, something that holds back oil and grease. But when a machine moves in more than one way—rotation plus axial movement, speed plus pressure fluctuation—a basic oil seal often falls behind. That’s where the combi oil seal earns its keep. It’s not a fancy buzzword. It’s a solution that’s been proven in heavy-duty equipment, energy applications, and industrial robotics where the usual stuff just doesn’t last. At its core, a combi oil seal is a hybrid. Two or more seal parts are brought together—most commonly, steel reinforcement + oil-resistant rubber, or a more advanced pairing: rubber + PTFE. The result is a compact seal unit that works harder and longer in complex motion environments. It’s About What the Seal Does—Not Just What It’s Made Of Let’s skip the catalog specs for a second. What really matters is this: It runs cooler. It handles pressure spikes better. It doesn't wear out the shaft. It lasts longer in dirt, vibration, and heat. The PTFE-based versions are particularly interesting. Because PTFE (commonly known as Teflon) doesn’t stick, doesn’t absorb oil, and has a super low coefficient of friction. That makes it ideal for systems with frequent start- stop motion or high shaft speeds. Unlike rubber, it won’t heat up and degrade quickly under movement. At DEDE, we’ve worked hard on refining the contact zones in our combi seals. For example, the rubber lip only lightly touches the shaft, just enough to keep a seal but not enough to fight against motion. That way, there’s less torque, less wear, and less risk of failure over time. Where You’ll Really See the Benefits These seals aren’t just “better”—they’re just more appropriate for certain industries:

Minimum Order: 500

A lot of people underestimate how much trouble a small leak can cause—until it starts affecting a whole system. If you’ve ever dealt with hydraulic leaks in a gearbox or seen oil dust caking around a drive axle, you’ll understand just how crucial a solid sealing setup really is. Over the years, one solution that’s gained popularity in rugged applications is the combi oil seal. It isn’t a flashy invention, but that’s the point. It's a practical, well- thought-out configuration made to address recurring issues in machines that run under pressure, vibration, and environmental exposure. Built from Experience, Not Just Materials The basic idea behind a combi seal is pretty simple: instead of relying on a single lip or material to block contaminants and hold fluid, you use a layered design—often involving rubber, PTFE, and sometimes spring elements—to get better performance across more demanding conditions. What makes this design useful is how it leverages different materials. The rubber provides elasticity and contact, while PTFE (polytetrafluoroethylene) gives the seal its edge in environments where things get hot, dirty, or corrosive. Notably, PTFE’s ability to resist sticking is a huge bonus. Many users report that over time, seals without PTFE tend to gum up—especially where dust mixes with lubricants. PTFE holds up better, even when cycling back and forth repeatedly. Where the Combi Seal Really Fits · Heavy-duty transport and construction vehicles—particularly wheel hubs and axle joints that face dirt, shock, and speed. · Agricultural machines like harvesters and planters—often operating in muddy or dusty fields. · Industrial hydraulic systems—especially those where access is limited and breakdowns are costly. · Wind turbines—where the yaw systems have to keep moving despite constant wind-blown sand and salt exposure. · Metallurgy equipment—rolling lines, furnaces, or gearboxes where both temperature and debris are a constant. What unites all these situations isn’t just harsh conditions—it’s the fact that replacing seals is either expensive, time-consuming, or both. That’s why long service life, low maintenance, and predictable wear behavior matter so much. Not Just Theory—NQKSF Builds These with Purpose At NQKSF, we’ve spent more than three decades working with OEMs, maintenance teams, and machine builders across different sectors. We don’t just sell combi seals—we help make sure they’re the right fit, both in size and in function. Sometimes a customer comes to us thinking they need a high-temperature rubber seal, when the real issue is shaft misalignment or pressure spikes. In those cases, we help them choose a combi structure with a built-in PTFE element or a spring-load that can adapt to changes. It’s not about over-engineering—it’s about choosing the right setup for the job. We keep over 10,000 different sealing parts in stock, including O-rings, traditional oil seals, and multiple configurations of combi seals. That allows us to ship standard products quickly and focus our engineering time on custom solutions where it matters most. Real Customization Means Real Results For us, customization doesn’t mean just changing the color of the rubber. It means: · Selecting the best elastomer or PTFE grade for the media involved · Adjusting lip geometry for speed, pressure, or directionality · Designing for compact systems where space is at a premium · Testing performance under cycling, vibration, or chemical exposure With in-house simulation tools and full-scale test rigs, we can model how a seal will behave before it ever reaches your equipment. That’s saved several of our clients major downtime in the past—especially in cases where small errors in seal design led to gradual leakage or premature wear. Backed by Facilities, Not Just Promises We're proud of our intelligent manufacturing setup. From material inspection to final packing, the entire production line is under our own roof. That gives us full control over quality, delivery, and consistency. We don’t just serve the domestic market either. Our seals are in operation in over 80 countries, and we’ve worked with several globally recognized equipment brands. We're also recognized as a High-Tech Enterprise and have been designated a Provincial Innovation Center in the sealing industry. Let’s be clear—combi oil seals aren’t perfect for every situation. In slow- sliding applications where ultra-tight static sealing is needed, a different type of lip seal might be a better option. But if you’re dealing with systems that move, rotate, vibrate, or run through dirty conditions for hours every day —this is where the combi seal proves its worth. The dual-material design cuts friction, handles pressure, resists wear, and helps reduce the frequency of replacement. That means fewer shutdowns, less troubleshooting, and more stable performance over time. We don’t think of combi oil seals as just products—they’re part of an entire system that needs to work reliably. Whether it’s an excavator axle, a wind turbine yaw gear, or a robotic joint in a dusty factory, the right seal can make the difference. At NQKSF, we combine real-world field knowledge, production control, and engineering service to support your sealing needs. We're here to help you get it right the first time—because we know what’s at stake when seals fail.

Minimum Order: 500

Sometimes, the smallest component in a machine ends up being the one that keeps everything else working. That’s usually the case with stainless steel PTFE seals series. They don’t get much attention—until something goes wrong. In our work, especially when dealing with pressure systems or chemical exposure, we needed something that didn’t just “fit,” but kept performing. That’s how we came to use these stainless PTFE seals. Not a new invention, but when combined properly, they hold up far better than most alternatives. You’ve got PTFE, which helps with friction and chemical resistance. That part’s straightforward. What’s often overlooked is how it behaves under stress—especially heat and mechanical load. That’s where the stainless core comes in. It gives shape. Holds structure. Keeps things aligned even after hours of operation. We’ve used these seals in pumps, motors, and rotary machines. Also in places where cleaning fluids or pressure cycling tends to kill rubber-based parts. They’re not magic. But when you choose the right shape—sometimes spring- loaded lips, sometimes a flanged edge—they tend to last. We keep a fair amount of types in stock. If a customer calls with a rush job, we usually have a workaround or a close match. For special cases, we work through sketches, simulations, sometimes just a quick call. We've got teams that know how this stuff behaves. The seals we send out usually fall within -65 to 260 degrees C. That’s enough for most systems we touch. Pressure? Depends. But 30 or 40 MPa isn’t out of range in static use. That said, we always recommend testing in the real setup. A lot of what we do isn’t about selling seals. It’s helping engineers avoid problems later on. When you choose a design early that matches real working conditions—not just catalog specs—you end up with fewer breakdowns, and fewer callbacks. That’s what we aim for.

Minimum Order: 500

In many industrial settings, the integrity of your system depends on the smallest components doing their job without fail. Seals, in particular, play a silent yet critical role—keeping fluids contained, contaminants out, and operations running without interruption. For conditions that push materials to the limit, NQKSF offers a solution built for endurance: stainless steel- reinforced PTFE seals. Stainless steel PTFE seals are not designed for the average application. They're developed for situations where ordinary seals deform, degrade, or simply give out. Whether it’s exposure to aggressive chemicals, fluctuating temperatures, or high-pressure environments, this series delivers dependable sealing performance when it matters most. Why PTFE Stainless Steel Shaft Seals? PTFE (Polytetrafluoroethylene) has long been a go-to material in sealing due to its remarkable chemical resistance and low friction. But in high-stress environments, PTFE alone may not offer the structural stability required. That’s where stainless steel reinforcement comes in. By integrating precision-formed stainless steel cores—typically in 304 or 316 grade—we combine the flexibility and inertness of PTFE with the strength and rigidity needed for high-pressure or mechanically demanding setups. The result is a robust sealing element that holds its form under stress while maintaining all the advantages of PTFE. Applications Across Critical Industries Stainless steel PTFE shaft seals are commonly used in industries where downtime is costly and safety is non-negotiable: · Chemical and petrochemical plants – For pipelines, valves, and reactors handling corrosive fluids. · Aerospace and automotive – In systems exposed to thermal shock, vibration, or high rotational speeds. · Power generation – Steam turbines, pumps, and compressors that face continuous pressure cycling. · Pharmaceutical and food equipment – Applications requiring both chemical inertness and hygiene compliance. Tailored to Perform We don’t believe in one-size-fits-all solutions. That’s why our stainless steel-reinforced PTFE seals come in multiple configurations: · Spring-energized lips for variable pressure conditions · Flanged and V-ring styles for axial loads · Custom lip geometries for specific dynamic sealing requirements Key performance metrics include: · Operating temperature: -65°C to +260°C (higher upon request) · Pressure tolerance: Up to 40 MPa (static or low-speed dynamic) · Chemical compatibility: Resistant to most acids, solvents, fuels, and high- temperature steam Wear resistance: Outstanding longevity in abrasive or high-cycle environments The NQKSF Difference What sets NQKSF apart isn’t just the materials we use—it’s how we work with our clients. With over three decades of expertise in sealing technology, we support everything from prototype development to volume production. · Over 10,000 part numbers in stock, including standard O-rings, oil seals, and customized designs · Fast delivery from our extensive domestic inventory · Certified R&D team with simulation, testing, and material analysis capabilities · Global customer base in over 80 countries We understand that every system has its own challenges. That’s why we offer engineering support from day one—helping you choose the right seal based on real-world conditions, not just specs on paper. If your system operates in an environment where failure is not an option, consider upgrading to NQKSF is stainless steel-reinforced PTFE seals. Backed by deep engineering knowledge and reliable production, PTFE seals series are built to handle whatever your machinery throws at them.

Minimum Order: 500

In the world of industrial machinery, it’s often the smallest parts that make the biggest difference. One such component is the EG Cover Seal—a quiet but crucial player in maintaining operational reliability. Whether you’re dealing with a hydraulic pump, a gearbox, or a custom-built motor housing, this seal protects your system where it counts: at the edge. What is an EG Cover Seal? An EG Cover Seal is a specially designed end-cap seal used to close off openings on mechanical housings, tubes, or cylinders. Its main job is to prevent external elements—like dust, moisture, or chemicals—from entering sensitive systems, while also ensuring that internal fluids stay securely inside. Unlike standard shaft seals that are often focused on dynamic sealing (rotation or reciprocation), EG Cover Seals are commonly used in static or semi-static applications. You’ll find them in power transmission units, hydraulic systems, gearboxes, and many other types of equipment where sealing strength and environmental protection are essential. Material Options for EG Cover Seals Not all EG seals are created equal. The choice of material can dramatically impact the seal’s effectiveness and longevity. Here are some of the most commonly used materials for EG Cover Seals: MaterialFeatures NBR (Nitrile Rubber)Excellent oil and fuel resistance, great for general- purpose applications FKM (Fluorocarbon)Exceptional high-temperature and chemical resistance, ideal for extreme conditions Need something custom? At DEDE, we manufacture according to your specs— including mixed material combinations. Why It Matters More Than You Think A good EG Cover Seal does more than just “plug a hole.” It’s your system’s first line of defense against performance degradation. When seals fail, contaminants sneak in, lubricants leak out, and suddenly, your system is no longer operating efficiently—or safely. Applications include: · Sealing the ends of hydraulic and pneumatic cylinders · Preventing oil and dust entry in gearboxes and axles · Protecting actuators and electric motors in automated systems · Isolating sensitive components in offshore and aerospace equipment Even a small seal failure can lead to system shutdowns, fluid contamination, and expensive repair downtime. That’s why selecting a high-quality EG Cover Seal is more than just a box-checking task—it’s a proactive investment in uptime. Benefits at a Glance ✅ Prevents external contaminants from entering ✅ Retains oils, greases, and hydraulic fluids ✅ Handles high static pressure and temperature fluctuations ✅ Customizable to fit irregular shapes or extreme conditions ✅ Built for long service life with minimal maintenance Why Choose DEDE for EG Cover Seals? With over 30 years of experience in industrial sealing, DEDE is trusted by professionals across 80+ countries. Our manufacturing plant supports both high- volume production and fully customized solutions. Our strengths: · Fast Delivery: 10,000+ stock seal types ready to ship · Full Custom Service: From design to production, tailored to your specs · Engineering Support: Need help selecting materials or designs? We’ve got your back · Real-World Experience: We've helped solve sealing issues in mining, aviation, agriculture, and more The EG Cover Seal may not look like much, but its role is foundational to the safety and performance of countless mechanical systems. Whether you’re upgrading an existing unit or building new machinery from the ground up, choosing the right seal matters. At DEDE, we’re not just a supplier—we’re your partner in sealing technology. Let us help you keep your machines protected, clean, and efficient, one seal at a time.

Minimum Order: 500

Not every machine breakdown makes headlines, but if you’ve ever had to shut down an entire system because of a leaking seal, you know how disruptive it can be. In many of the machines I’ve worked with—especially in automotive and heavy equipment—the smallest components often determine the biggest outcomes. That’s where the TG4 rotary shaft seal comes into play. What makes the TG4 oil seal different? The TG4 seal isn’t your typical oil seal. It has a three-lip structure that offers better protection than the standard two-lip versions (like TC or TB). This extra lip isn’t just for show—it helps deal with dust, moisture, and unexpected pressure surges that traditional designs often fail to handle. One client running hydraulic presses in a dusty environment made the switch and saw a drop in unplanned maintenance in just two months. Another key feature is the wave-shaped outer diameter. It’s subtle, but it improves grip and prevents rotation inside the housing—something that’s often overlooked until a seal spins out and causes a mess. Built for real-world use The TG4 uses nitrile rubber (NBR) for the lip and a steel core for structural support. This combination is known for its durability and oil resistance. You’ll find seals like these in gearboxes, shock absorbers, pump shafts, and axles. While FKM is an option in higher heat scenarios, NBR tends to be the go- to for most users thanks to its balanced performance and price. Inside, a spring keeps the lip under tension, which is crucial if the shaft speed fluctuates or if you're dealing with pressure spikes. When should you consider TG4? From what we’ve seen in the field, TG4 performs well in: Off-road vehicles and construction machinery, where dust and vibration are nonstop. Gear-driven equipment with long duty cycles and limited shutdown windows. Hydraulic motors and pumps, where even a small leak can cause major losses. Energy systems, such as wind turbines or generators, where long-term reliability matters. If your equipment isn’t sitting in a climate-controlled lab but out there in mud, dust, or oil mist, this seal has likely been designed with your challenges in mind. Not just another spec sheet We’ve sold TG4 seals to dozens of countries, and while we keep over 10,000 sizes in stock, customization is where we really shine. Need a specific lip material? A different spring tension? Slightly oversized for an old shaft? No problem. We’ve seen some strange setups over the years, and we usually find a solution. One example: a customer in South America needed TG4-type seals for an outdated turbine drive. None of the catalog specs fit. We reverse-engineered their housing dimensions and sent a batch of custom units. They’ve been using them ever since. Why work with DEDE? We’ve been in this business for over three decades. Unlike trading platforms that just ship parts, we actually design and produce our seals. That means we know what goes into each one—and we can stand behind their performance. What we offer: Fast dispatch on common sizes Fully customized designs for special applications Engineering support when you need to troubleshoot or upgrade your system Competitive pricing without cutting corners on materials Final thoughts The TG4 rotary shaft seal isn’t flashy. But if you’re in an industry where downtime costs money, it’s one of those parts you don’t want to cut corners on. We’ve seen it outperform traditional seals time and again—especially where other designs fell short due to dust, vibration, or heat. If you’re unsure whether TG4 is right for your setup, get in touch. We can take a look at your working conditions and help match the right material and structure. At the end of the day, a good seal is the difference between weeks of smooth operation and an unexpected repair job. The TG4 helps tip the odds in your favor.

Minimum Order: 500

Have you ever wondered what helps many machines operate smoothly day after day, often under intense pressure and temperature? You might not give it much thought, but the BASL oil seal is doing a lot of the heavy lifting behind the scenes. This small, often overlooked part plays a critical role in keeping machines running efficiently by sealing in lubricants and keeping out dirt, dust, and other harmful particles. Why BASL Oil Seals Deserve Attention There’s a good reason why many industries rely on BASL oil seals. Unlike basic seals, the BASL version features a double-lip design: one lip keeps the lubricant in, while the second lip acts as a barrier against contaminants like dust and moisture. Together, they offer a smart, practical solution to protect rotating shafts in a wide range of machinery. At the heart of the design is a reinforced metal frame wrapped in flexible rubber. The sealing lip maintains firm contact with the rotating shaft, while the dust lip prevents outside particles from entering. This dual function makes BASL oil seals especially effective in demanding environments where single-lip designs often fall short — like high-speed, high-temperature, or high-pressure conditions. Not All BASL Oil Seals(TC BASL Oil Seal) Are the Same — Material Makes a Difference Different working conditions call for different materials, and BASL oil seals are available in several types to suit various applications. Two of the most commonly used materials are: Fluororubber (FKM): Known for its excellent resistance to heat and chemicals, FKM is ideal for sealing systems in chemical plants, oil refineries, and high- temperature equipment. It holds up well even under extreme thermal conditions. Nitrile rubber (NBR): With great oil and abrasion resistance, NBR is widely used in automotive gear systems, hydraulic components, and general industrial machinery. It offers a balance of performance and affordability, making it a popular choice for everyday applications. Each material brings unique strengths, so selecting the right one depends on your specific working environment — whether it’s dealing with heat, pressure, chemicals, or all of the above. Standard Sizes or Custom-Made — We’ve Got You Covered At NQKSF, we understand that not every piece of equipment works with off-the- shelf parts. That’s why, in addition to maintaining a large inventory of standard BASL oil seals (over 10,000 specifications available), we also provide fully customized sealing solutions. Got aging machinery that needs a hard-to-find size? Working in extreme conditions that require a special material? Our experienced engineers are here to help. From material selection and structural design to testing and final delivery, we’ll make sure your seals are precisely maBASLhed to your system’s requirements — not just in theory, but in practice. Trusted by Clients in 80+ Countries With more than 30 years in the sealing industry, NQKSF has earned a reputation as a reliable partner in sealing solutions. Our products are used in industries ranging from automotive and agriculture to energy, mining, and heavy machinery. To date, we’ve shipped to customers in over 80 countries, and our global reach continues to grow. But we’re not just selling products — we’re providing ongoing technical support and solutions that help reduce long-term maintenance costs. We work closely with our clients to optimize sealing performance, improve equipment stability, and extend service life. BASL Oil Seals: Small Components, Big Impact At first glance, a BASL oil seal might seem like a small and simple part. But when it comes to machinery performance, it plays a big role in keeping things running smoothly. With the right material, a well-thought-out design, and proper installation, BASL oil seals can help prevent leaks, reduce wear, and minimize downtime. At NQKSF, we’re proud to provide not only reliable, high-quality products, but also the custom engineering support that helps our customers solve real-world challenges. Whether you need a standard seal for regular maintenance or a custom solution for a unique application, our team is ready to help you get the job done right. BASL oil seals are more than just spare parts — they are essential tools for machine longevity and reliability. At NQKSF, we’re committed to providing sealing solutions that meet the demands of modern industry, from conventional machinery to extreme operating conditions. With decades of experience, global service capabilities, and a problem-solving mindset, we’re ready to be your trusted sealing partner — now and in the future.

Minimum Order: 500

In the actual work site, many times you want to find an O-ring of the right size - but you may not be able to find it. Especially when you encounter some non-standard size sealing grooves, or old equipment suddenly leaks oil, you need to replace a ring, and wait for molded parts? That will delay things a lot. At this time, o-ring cord are particularly useful. Cut as long as you want, and stick it with special glue to form a circle immediately. If you have some experience, you can get it done in ten minutes and use it on site. Although it is mainly used in static sealing places, its emergency response ability is awesome. Where will it be used? You can guess but you may not have guessed it all To put it bluntly, almost as long as there is a liquid to be sealed and a gas to be prevented from leaking, it is possible for it to play a role. Like hydraulic systems, gearboxes, pumps, valves, and even wind power equipment, sewage treatment plants, and auto repair workshops, these places often see the shadow of o ring cord. Many times, a roll of wire can replace dozens of types of O-rings. Maintenance masters, equipment managers, and field engineers all love it. It is convenient, easy to use, and inexpensive. There are many materials, and it is important to choose the right one. There are many o-ring cord materials on the market, and the common ones are as follows: NBR nitrile rubber: oil-resistant, enough for general equipment, fuel, and hydraulics; FKM fluororubber: heat-resistant and corrosion-resistant, suitable for high temperature and acid-base media; There is really no universal answer to material selection. It depends on the equipment conditions, such as temperature, pressure, type of medium, and where you want to seal it. Don't just think of it as a wire, we treat it as a "live part" At DEDE, we have been in the sealing industry for more than 30 years. This o- ring cord is a rubber wire, but we don't treat it as a "consumable". If you come to ask us for goods, we won't just ask you how many diameters you want and send a courier. We will ask you clearly what medium you are sealing, whether it is static or dynamic, whether it is positive pressure or negative pressure, or whether there is a temperature difference shock. If you really want to fit the working conditions, you have to consider the materials, hardness, bonding method, and groove type at once. This job is no easier than making an engine. A little inventory, dozens of models This is quite interesting. Some customers used to have dozens of different types of O-rings in their warehouses, which not only took up space, but some models were covered with dust all year round. But after using o ring cord, the situation is different. We provided them with several commonly used diameters of wire, plus a small bonding tool, which can basically cope with more than 80% of maintenance needs. The inventory has been reduced, and the efficiency has been improved. Where are the customers? From small workshops to large projects The customers we serve actually span a wide range. Some people open small repair shops, and some people are working on wind turbine blade transmission systems. Some projects are hydropower stations in remote mountains, and some are instrument seals in highly corrosive environments on the coast. What they have in common is that they are reliable in sealing, easy to maintain, and do not cause any delays. Under such demand, O-type strips become particularly cost-effective. The end Don't underestimate a rubber wire. If it is selected incorrectly or connected incorrectly, the entire equipment may leak, stop, or have an accident. But if used well, it can help you solve many things that would otherwise be very troublesome. o-ring cord are not complicated, but there are many tricks. We DEDE have been in this business for a long time, and have seen many customers go from "no idea" to "use it smoothly". If you don't understand any section of wire selection, size, bonding, or material, come and talk to us, don't grope around on your own. Sometimes, a suggestion may be more useful than a hundred sealing rings.

Minimum Order: 1 bags

You may not have noticed it, but it is an indispensable role in many mechanical equipment. We are talking about the o ring core series. As the name suggests, its cross section looks like an "O", and the name couldn't be more straightforward. Although it is just a seemingly simple round rubber strip, its performance in sealing occasions makes many engineers willing to put it in the first place. Why? There are really many reasons. Why do many people use it? One of the great advantages of the o-ring core series is: flexibility and strong adaptability. Unlike those molded o-ring of fixed sizes, this wire-like o-ring core can be cut, that is, one roll after another, and you can cut it as long as you want. After bonding into a circle, it can also be used in many non- standard groove structures, which is particularly convenient for on-site processing. This can be seen in the value of emergency repairs. Sometimes, you urgently need an O-ring of a special size, but there is none in the warehouse. At this time, cut a section of the o-ring core, glue it on the spot, and the problem is solved. It is very practical for industries such as wind power, metallurgy, and water treatment, where the maintenance rhythm is tight and downtime will affect the benefits. This solution is particularly convenient, but it should be noted that the extrusion molding process makes its cross-sectional tolerance greater than that of the full-molded seal. This o-ring core bonded seal ring is more used for static sealing. If it is a high-speed rotating shaft, it is recommended that you choose compression molding, which will be more stable. Where can it be used? You may not think of more Don't underestimate this small seal, its "appearance rate" is higher than you think. From hydraulic systems to industrial robotic arms, from gearboxes to water treatment equipment, it can be seen. Pumps, valves, motors, gearboxes... As long as it involves sealing, it may come in handy. We have customers who are engaged in rail transportation, and there are also customers who are engaged in wind power, chemical industry, and automation equipment. They are also using o-ring cores to solve many on-site sealing problems. There is more than one material, and they adapt to different environments Different applications have different requirements for seals, and NQKSF provides o-ring core wires that are also "different in their strengths." Nitrile rubber (NBR): oil-resistant, cost-effective, and a "regular player" in industrial sites. Fluororubber (FKM): high temperature and chemical corrosion resistance, outstanding performance in energy, chemical industry, and engine. Each material has its own characteristics, and none of them is omnipotent, but as long as the right occasion is chosen, their performance is not bad. Our engineers often help customers choose suitable materials based on their equipment and working conditions. Not just "selling materials", we also understand engineering Many customers come to us not just to buy a roll of wire. They will ask: "My location has high temperature, large pressure fluctuations, and corrosive media. Do you have more suitable suggestions?" - Yes, we have a team of engineers to help you analyze this situation and make customized recommendations. From material selection, cutting length, bonding method, groove matching to test verification, we can participate. For some batch requirements, we can also mass produce according to your drawings to ensure that each batch of sealing rings is tightly fitted. Standard inventory + customized service, flexible combination We have tens of thousands of common specifications in our inventory, which can meet the needs of most working conditions. For non-standard situations, the customization process can be started at any time, and the delivery is also very fast. We control the entire production system ourselves, and we are more assured of the delivery speed and quality control. Trust from more than 80 countries around the world · NQKSF has been in the sealing industry for more than 30 years. We are not the kind of factory that only produces standard parts, but we have our own technical system in material research and development, sealing solutions, and industrial chain management. · At present, our products have been exported to more than 80 countries on five continents around the world, and many customers are long-term international brands. There are also many equipment manufacturers who regard us as engineering partners for joint project development. In summary, why choose NQKSF is o-ring core? 1. It can be cut as needed, and can flexibly meet various size requirements on site; 2. There are many material options, covering everything from normal temperature oil resistance to high temperature chemical corrosion resistance; 3. Save inventory, not picky about groove type, suitable for maintenance conditions; 4. Provide on-site bonding tools and technical support, more worry-free; 5. From a wire to a project plan, we can help you get it done. Although the seal is small, it has a big impact. If you choose the right one, it will not only save trouble, but also reduce maintenance costs and extend the life of the equipment. NQKSF, as a team dedicated to seals, is willing to put these experiences into practice with you. If you are not sure about a certain size or material, our engineers can always contact you to help you find a suitable solution.

Minimum Order: 1 bags

X-rings, also known as star rings due to their distinctive X-shaped cross- section, represent a thoughtful upgrade from the traditional O-ring. While both serve the purpose of sealing, the X-ring stands out for its refined design— specifically the four sealing lips and a small lubrication cavity in the center. This unique structure helps reduce both friction and starting resistance, making it ideal for dynamic applications. One of the often-overlooked advantages of X-rings is the positioning of the flash line—it sits in the recessed area of the cross-section, which not only improves the seal but also reduces the chances of leakage. In other words, the X-ring takes everything good about the O-ring and pushes it one step further. A Smarter Choice for Demanding Applications X-rings can be used in a wide variety of environments. To ensure optimal performance, the material must be chosen based on factors like temperature, pressure, and the type of medium involved. It’s not just about choosing a rubber ring—it’s about matching the right material to the job. When setting up a system, engineers should factor in peak and continuous operating temperatures, the frequency of use, and in rotating applications, the heat generated from friction. These considerations will determine the service life and effectiveness of the seal. What Makes X-Rings a Better Performer? Unlike an O-ring, which only has one contact point, the X-ring offers four contact surfaces. This means pressure is distributed more evenly, reducing friction by up to 40% and significantly slowing wear over time. It’s a clear performance boost, especially in systems that cycle frequently. Where Do X-Rings Shine? You’ll find X-rings in some of the most demanding applications: Heavy-duty machinery: hydraulic cylinders in excavators and presses Industrial robotics and turbines: rotating shafts and spindles Aerospace systems: actuators in aircraft landing gear that face sudden pressure changes Automotive transmissions: dual clutch systems that require precise sealing Oil and gas: critical components like blowout preventers in offshore rigs Material Options for Different Needs Different environments demand different materials, and X-rings are available in several: NBR (nitrile rubber): cost-effective, reliable across a wide range of industrial uses (-40°C to +125°C) FKM (fluoroelastomer): excellent resistance to high temperatures and aggressive fluids (-20°C to +250°C) PTFE: ideal for low-friction, high-precision sealing in sensitive equipment Why DEDE’s X-Rings Stand Out As a certified high-tech enterprise recognized for “specialization, refinement, and innovation,” DEDE brings over 30 years of experience in sealing technology. We don’t just offer parts—we provide complete sealing solutions. Whether it's rapid prototyping for custom designs or supplying from our inventory of over 10,000 standard parts, our flexible production system meets global demand with speed and precision. Today, DEDE supports clients in over 80 countries with localized technical guidance, ensuring that our seals don’t just fit—they last. If you're unsure about the specifications or material choice for your application, our engineering team is ready to provide tailored advice. With X- rings, it's not about using just any seal—it’s about using the right seal.

Minimum Order: 500

In the global supply chain, a reliable and high-performing sealing solution is critical for the stability of mechanical systems. The o-ring series, widely used across industries, provides the foundation for leak-proof and pressure- resistant assemblies. Whether you operate in automotive manufacturing, energy infrastructure, or heavy industrial machinery, choosing the right o-ring can directly impact operational efficiency, maintenance costs, and equipment safety. what makes the o-ring series essential O-rings are circular elastomeric seals designed to prevent the passage of liquids or gases between machine parts. Their compact shape and elastic properties make them ideal for both static and dynamic applications. Depending on the environment, o-rings can be customized in terms of: material: such as nitrile (nbr), fluorocarbon (fkm/viton), silicone (vmq), epdm, and more hardness: typically measured in shore a temperature range: from -60°C to +250°C depending on material pressure tolerance: varies by application, especially in hydraulic and pneumatic systems Each specification is selected based on working conditions such as chemical exposure, pressure levels, thermal expansion, and movement frequency. DEDE provides full-service sealing solutions With over three decades of expertise in the sealing industry, DEDE offers a complete solution package for global B2B clients: standard stock availability: our warehouse covers over 10,000 o-ring and oil seal specifications, allowing fast delivery for urgent needs custom-made development: we offer end-to-end customization—from material engineering and structure design to precision molding and pressure testing technical support: DEDE’s senior engineers help clients optimize sealing performance and reduce failure rates, particularly in complex or high-risk systems Whether you're dealing with oil pumps, electric motors, gearboxes, or robotic systems, our experts work with your team to ensure the sealing solution fits the precise demands of your machinery. why global buyers choose DEDE DEDE is more than just a manufacturer—we are a solution provider. Our key advantages for international B2B partners include: in-house production: DEDE owns and operates a physical smart factory equipped with automated molding and testing equipment certified innovation: we are a provincial-level innovation center and recognized high-tech enterprise, with several patented seal technologies broad international reach: products are exported to over 80 countries and are trusted by global equipment brands all-in-one inventory: from small o-rings to large industrial seals, our full catalog reduces the need to source from multiple suppliers Our focus on long-term partnerships means we support your procurement team with consistent quality, technical transparency, and after-sales service. applications that rely on the o-ring series The versatility of DEDE’s o-ring series allows them to perform reliably in various high-demand sectors: automotive: fuel systems, engine seals, brake and suspension units industrial automation: pneumatic actuators, cylinders, and control valves energy and oil field: pumps, turbines, and pipe systems in oil and gas industries agricultural machinery: hydraulic systems, water pumps, and gearboxes home appliances: water filters, pressure regulators, and vacuum systems aerospace and transport: sealing units for aircraft, trains, and maritime engines Each application places unique demands on seal integrity, temperature resistance, and longevity—challenges that DEDE’s engineering and material selection address head-on. In global industrial procurement, choosing a reliable o-ring supplier can make the difference between consistent performance and unexpected downtime. With DEDE, clients gain access to a trusted brand with deep technical expertise, full in-house manufacturing, and a ready-to-ship product range. Whether you're sourcing high-volume standard o-rings or need non-standard custom parts, DEDE is your ideal long-term sealing partner.

Minimum Order: 1000

Bolt holes and threaded joints may appear trivial, yet unsealed they lead to fluid loss, air ingress, and inefficiency. Bonded seals are the simple fix. DEDE is dual workhorse line—self‑centering or non‑self‑centering—ensures every connection holds tightly. What Makes Them Special? Self‑Centering Bonded Seals: Fixes automatically in the bore, making assembly fool-proof, even in field service Non‑Self‑Centering Bonded Seals: Ideal for flush mounting and full compression sealing Key Specs Materials: Rubber types—NBR, HNBR, FKM—bonded to steel or stainless cores Temperature range: -40 °C up to +250 °C depending on rubber Pressure capability: Up to 40MPa in demanding oil/hydraulic circuits Where You’ll Find Them Pumps, motors, valves in machinery and robotics Gearbox drain/fill ports in automotive and railway vehicles Cylinder head plugs in automotive and industrial engines Hydraulic valve manifold plates in wind turbines Heavy-duty equipment in construction, mining, agriculture DEDE – More Than Just Seals Stock: 10K+ O‑rings and seals ready to ship Custom: Tailor-made bonded seals from initial design to lab testing Tech support: 30+ years of sealing problem-solving know-how Brand Highlights Own mold shop and bonding plant for consistent quality Certified as High‑Tech Enterprise, contributing to China’s seal industry cluster Serving global markets in Asia, Europe, Americas with reliable supply The TakeawayFrom the workshop to the factory floor, from prototype to production—DEDE is bonded seals lock down your system. Whether self‑centering or not, they keep hydraulic systems leak-free and operators worry-free.

Minimum Order: 500

　　As industrial hydraulic and heavy-duty equipment reach higher pressure ratings, conventional oil seals are increasingly pushed beyond their design limits. The TCN High‑Pressure Oil Seal Series, developed by NQKSF (ShanFeng), provides a robust sealing solution engineered for high‑pressure environments, protecting equipment and minimizing maintenance cost. 　　Engineering Challenges in High‑Pressure Environments 　　High‑pressure systems face multiple simultaneous challenges: 　　Frequent pressure spikes common in hydraulic cylinders and actuators 　　Rapid temperature variations that strain standard elastomers 　　Dust, dirt, and fluid contamination accelerating seal wear and leakage 　　The TCN series addresses these through its advanced structural design and material selection, significantly enhancing reliability. 　　Product Features 　　Cloth‑reinforced skeleton for enhanced resistance to pressure deformation, maintaining integrity under up to 70 MPa transient loads 　　Dual‑lip or tri‑lip geometry—main lip for oil sealing, secondary lips for dust and fluid exclusion 　　High-performance elastomer compounds (NBR, FKM, PTFE) tailored for temperature, chemical resistance, and fluid compatibility 　　Precision molding and tight shaft interface fit minimizing leakage and friction 　　Optimized for longevity in hydraulic machinery, wind turbines, agricultural equipment, and metalworking applications 　　Recommended Applications 　　Hydraulic pumps, cylinders, and motors in industrial and mobile systems 　　Gearboxes and actuators in construction machinery 　　Wind turbine pitch and yaw mechanisms 　　Mining and metallurgy hydraulic platforms 　　Agricultural machinery and heavy transport equipment 　　NQKSF is Comprehensive Support Services 　　Fast delivery from stock – Over 10,000 seal models including TCN series available for immediate dispatch 　　Custom seal development – Material selection, CAD design, lab testing, and pilot production tailored to customer requirements 　　Technical design support – Utilizing CFD and FEM tools for sealing performance optimization, reducing leakage risk and lifecycle costs 　　Engineering Expertise 　　With over 30 years of sealing industry experience, NQKSF operates a fully integrated manufacturing facility, including: 　　In‑house compound formulation and rubber molding 　　Automated production and testing equipment 　　Provincial Technology Innovation Center and High‑Tech Enterprise certification 　　Global reach – exporting to over 80 countries with key partnerships across Europe, Southeast Asia, Middle East, and South America 　　Why Choose TCN High‑Pressure Oil Seals? 　　Exceptional pressure resistance to protect against shock-induced failures 　　Extended lifespan under abrasive and high-temperature conditions 　　Comprehensive customization and engineering support matched to precise application needs 　　Stable quality and supply chain backed by NQKSF is modern factory and certifications 　　For hydraulic engineers, OEMs, and industrial equipment suppliers seeking enhanced reliability, longer life, and reduced downtime, NQKSF is TCN High‑Pressure Oil Seal Series offers a proven, high-performance sealing solution. Contact us for technical data, pricing, or sample inquiries.

Minimum Order: 500