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When oil seals fail in high-temperature applications, people often blame the product. But in most cases, the problem isn’t the seal itself—it’s the material behind it. I’ve seen this countless times in the field. A customer replaces seals every few months, still leaking. Once I check the setup, the oil temperature sits above 120°C, and they’re using standard nitrile rubber (NBR). At that point, failure isn’t a surprise—it’s just chemistry doing its job. Temperature Always Wins Oil seals depend on flexibility and surface tension at the lip. When heat rises, the rubber loses its elasticity. The sealing edge turns rigid, allowing oil to pass through microscopic gaps. The general rule of thumb: Below 100°C, NBR performs fine. From 120°C to 200°C, go with FKM. Beyond 200°C, PTFE becomes the only safe bet. But reality isn’t that neat. Oil type, shaft speed, and installation precision all matter more than any chart can show. Comparing Common High-Temperature Materials FKM (Fluorocarbon Rubber) – A proven choice for engines and gearboxes. It stays stable at around 200°C and resists fuel, synthetic oils, and additives. The only catch is cost and the need for precise installation. PTFE (Teflon) – When nothing else survives, PTFE does. It laughs at chemicals, acids, and heat. Many imported machines use PTFE-lipped seals with metal casings for high endurance. The trade-off: no natural elasticity. Alignment must be perfect. Silicone (VMQ) – Great for food or pharmaceutical applications. Handles up to 180°C, remains soft at low temperatures, but it’s not tough enough for high-speed shafts. EPDM & PU – EPDM resists steam and aging but fails in oil contact. PU is strong and wear-resistant but softens and degrades under continuous heat. Installation – The Silent Killer A lot of “bad seals” are actually victims of bad installation. I’ve seen seals crushed, scratched, or fitted dry. Even the best material can’t survive that. A few rules that always work: Lubricate the lip before fitting. Keep the shaft smooth and free from burrs. Use a press tool instead of a hammer. Check the direction—the lip must face the oil side. For Distributors and B2B Buyers Dealers often worry less about the brand and more about consistency. One batch works perfectly, the next fails early—that’s what kills trust. A reliable manufacturer clearly marks temperature ratings, material type, and oil compatibility. Providing customers with technical notes, test data, or even a short recommendation sheet can make all the difference. Buyers remember the supplier who solves problems, not just the one who ships boxes. Choosing oil seals for high heat isn’t about chasing the highest temperature rating—it’s about balance. If your working temperature is near the material limit, move up one grade. If the shaft runs fast, focus on surface finish and lubrication. FKM works well for most industrial setups; PTFE for extreme ones. I’ve always believed that a good seal isn’t expensive—it’s just correctly chosen. When the material matches the job, even under harsh heat, the machine stays dry and smooth.

Minimum Order: 1000

Anyone who has worked around engines or industrial equipment knows that oil seals look simple but carry huge responsibility. When machines run hot, seals face their toughest test — heat, friction, and oil breakdown. The question many engineers and buyers ask is: what material works best for oil seals in high-temperature environments? Why Heat Is the Silent Enemy Rubber and heat have always been uneasy partners. At high temperatures, most rubber compounds lose elasticity, become brittle, or even shrink. Once that happens, the sealing lip no longer holds pressure, and oil starts to escape along the shaft. In industries like automotive, marine, and heavy machinery, where systems run continuously under high load, choosing the right material is not optional — it’s survival. Common Materials for High-Temperature Oil Seals FKM (Fluoroelastomer) Probably the most widely used material for high-temperature seals. It can handle up to around 250°C, resists oil and chemicals, and keeps flexibility under long-term exposure. You’ll find it in engine crankshafts, transmission systems, and hydraulic units. Its only real weakness is cold weather performance. PTFE (Polytetrafluoroethylene) PTFE is the go-to material for extreme environments. It can handle 260°C or even higher, has low friction, and barely reacts with any fluid. However, it requires precise machining and smooth shaft surfaces. It’s ideal for high- speed or high-pressure sealing applications. VMQ (Silicone Rubber) Silicone performs well in high-temperature air environments but doesn’t handle oils as well as FKM or PTFE. It’s commonly used in food machinery, blowers, and other clean applications where oil resistance is not the main factor. HNBR (Hydrogenated Nitrile Rubber) HNBR sits between NBR and FKM. It provides good resistance to heat, ozone, and oil, and is often used in truck engines and heavy-duty vehicles. A practical, cost-effective option for mid- to high-temperature sealing. Installation and Fit Matter Too Even the best material will fail if the seal is installed incorrectly. The shaft surface must be clean and smooth, the seal should be pressed in evenly, and a thin layer of grease helps reduce friction at startup. If the seal lip is twisted or the shaft is slightly misaligned, leaks will appear within weeks. Always remember: material is only one part of the story — fit and handling make the difference. Choosing the right oil seal for high-temperature conditions isn’t just about picking the most expensive material — it’s about choosing what works best for the specific environment.

Minimum Order: 1000

Device Function：Wire harness welding, ultrasonic scanning detection, support for multiple welding modes Equipment Features：Simple operation, low maintenance cost, no need to change molds, and small footprint Equipment power：2000W Dimensions：573*220*175mm Equ , ipment weight：54kg (electrical box and equipment together) Rated voltage：AC220V 50Hz Welding range：1-10mm copper wire, aluminum wire Display Mode：Touch screen control and adjustment Production efficiency：About 0.6 seconds/time, depending on the welding square

Minimum Order: 1 bags

2.5 Ton Battery Powered Mining Accumulator Locomotive for Gold Mine We are the original supplier of mining locomotive and its spareparts, we could provide you with the online visit of our factory! Battery electric locomotive is a kind of track traction equipment powered by batteries, which is generally used in mines. There are two types of battery electric locomotives, explosion-proof type and ordinary type. The explosion- proof type is mainly used in coal mines. There are also many options in terms of speed regulation and braking methods. Speed control methods include resistance speed control, chopping speed control and frequency conversion speed control. Braking methods include pure mechanical braking, hydraulic braking and compressed air braking. In addition, electric braking can also be selected as an auxiliary braking method. Total weight (t) : 2.5 Track gauge (mm) : 600,762 or 900 Traction (KN) : 2.55 Max. Traction (KN) : 6.13 Speed(km/h) : 4.54 Battery Voltage (V) : 48 Battery Capacity (Ah) : 330 Power (KW) : 3.5*1 Dimensions Length(mm) : 2360 Width(mm) : 914,1076 or 1214 Height(mm) : 1550 Wheelbase (mm) : 650 Wheel diameter (mm) : 460 Min Curve radius (m) : 5 Controller : Resistance or IGBT Braking method : Mechanical Brake Advantages of our product 1.Using high-quality steel plates, special rust removal process make sure it more anti-corrosion and suitable for harsh mining environment. 2. Producing motors ourselves, using high lever insulation material and pure copper, ensure the powerful traction force, and suitable for harsh mining environment. 3.Gear anastomosis surface to reach more than 80%, which is far more exceeding the standard. 4.Professionally designed and adjusted frame ensure safe driving and avoids falling off rails. 5.A variety of braking methods can be choose, air brake, hydraulic brake, electric brake, mechanical brake to ensure the safety drive. 6. 40 years richful experience with the ability to design and make customized product according to your requirements. 7. Proving factory online-visiting Product Factory Test Mining Locomotive test 1.Before Running the locomotive,carry out gear debugging, lighting, gear, and brake adjustment etc.To ensure the normal operation of the locomotive. 2.Carry out a tensile test before leaving the factory to ensure the load performance of the locomotive meets the standard. Our design standards generally exceed the national standard by 10%-20%. 3.Carry out different type running test before leaving the factory to ensure the performance and normal operation of the whole locomotive. It can adapt to various harsh conditions under simulated working conditions. Motor test The motor has to go through many inspection procedures before leaving the factory, and each motor has to be carried out with load running experiments. Explosion-proof motors are carried out with water pressure test. All the test of motor is to ensure that can adapt to harsh working conditions. Clients Feedback and Cases 1. A good feedback of our lithium battery locomotive from a client of Latin America 2. In order to solve the exist problems of lead-acid batteries. More than 30 lead-acid battery electric locomotives in this large mining were changed into lithium battery electric locomotives, which improved the work enthusiasm and production efficiency of employees, reduced costs,and more environment- friendly. 3. The mining rock drill car designed by Sunward Co., has a small size and simple structure, so the space for placing the lithium battery on the body is very limited. According to the limitation size, our company design a lithium power supply power plan, which perfectly solves the problem of lithium power supply space. In order to adapt to the special industrial and mining environment and improve transportation efficiency, a batch of 2.5-ton lithium battery electric locomotives are designed to Myanmar Clients. FAQ What's your product advantages? We have more 40 years experience in this field so that we could design or produce the locomotive as your requirement. We could also provide online service to teach you how to operate and maintain the locomotive. The most important thing that we produce the main part of the locomotive- The traction motors. we could guarante the power of the locomotive. Pre-sales Service: The wide product range enables us to provide our customers with individual machines or complete processing plants. Based on our customer's request and budget, our experts make efficient and reliable solutions, and we produce strictly follow customers' order. What's more, every customer has the chance to visit the working machine in the site before placing the order. After-sales Service: Experienced technicians guidance is available on the phone, and on the internet. One or more engineers will be dispatched to the quarry site to help install the customer's plants.Necessary training about machine daily maintenance to local workers is provided also. Methods of Payment: T/T (Telegraphic Transfer) or Western Union or L/C at sight Handling time for an order: Within 10 days supplied from stock Shipping method: Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air Bulk order: we suggest by air or by sea. Quality Control: We have our own experienced QC. There will be strict inspection and testing for every order before shipping out. After Services: a. Our sales team will response for your question within 24 hours (Holiday is Excluded) b. Technical Support will be available in any time c. Free replacement will provide once the failure confirmed caused by our product quality

Minimum Order: 1 bags

Ultrasonic frequency:20KHz Ultrasonic power:3000W Operating voltage:220V, 50/60Hz Weight:8.5kg External dimensions: chassis 445L * 370W * 150H (mm) Machine head 575L * 125W * 160H (mm) Model features: Wire to wire welding, copper wire or aluminum wire can be used Application scope: Automotive wire harness processing, wire end bonding, wire connection, etc

Minimum Order: 1 bags

Voltage:AC220/60HZ Motor Power:750W/RV63/1;15 Crimping Force:2.5T Copper Strip Feeding Mode:Motor Drive / Step Feeding Maximum Copper Strip Length:60MM/Maximum Copper Strip Length 22MM Maximum Copper Strip Width:6MM Maximum Crimping Width:6.5MM Maximum Crimping Diameter:6mm2 X 2 Operation Mode:Pedal Switch / Single Action Overall Size:300 X 300 X400 (MM) Technical Characteristics: 1: This machine is equipped with 750W motor and RV63 reducer, and it has a large crimping force because of the large torque with a 40 percent increase over the traditional machines! 2: The three axles through-type spindle mounting method, front and back supporting, concentric axles without gap, keeps the crimping force much firmer! 3: The motor drive step feeding and digital length setting ensure the easy and quick adjustment and more stable wire feeding! 4: The diameters of main axle and eccentric shaft are expanded to lead the main axle to have better intensity and be more durable! 5: The optimized box structure with the machine head in the box, has stronger bearing strength than the traditional machines in which four screws are used to connect the machine head to the middle base! 6: The working height is reduced to the height of the operator’s fist, to reduce the operating fatigue degree benefiting from the supporting of machine base when working.

Minimum Order: 1 bags

The EDS-2513 UV printer can print high resolution, full color images on any flat materials. It uses UV curing technology, and the printed ink is instantly cured, colorful, and has strong adhesion. It's suitable for plastic, glass, ceramic tile, metal, wood, leather, etc, and can meet the mass production needs of many industries. Features Model EDS-2513 UV Printer Printhead quantity 2-8 pcs Printing size 2500x1300 mm Printhead model RICOH G5/G6 Printing platform Vacuum platform Printing direction Uni and Bidirectional Ink system Negative pressure system Ink color CMYK+LC+LM+W+V Printing resolution 720x600, 720x900, 720x1200DPI Printing mode Multi pass File format PDF, TIFF, JPEG, AI, etc. Inkjet technology Micro piezoelectric Ink type Eco UV ink

The EDS-9090 UV printer can print on any flat materials, it uses micro piezoelectric inkjet and UV curing technology. It's very suitable for small batch personalized custom printing, stable performance, simple operation and low maintenance cost. Features Model EDS-9090 UV Printer Printhead quantity 5-8 pcs Printing size 900x900 mm Printhead model RICOH GH2220 Printing platform Vacuum platform Printing direction Uni and Bidirectional Ink system Negative pressure system Ink color CMYK+White+Varnish Printing resolution 720x600, 720x900, 720x1200DPI Printing mode Multi pass File format PDF, TIFF, JPEG, AI, etc.

The EDS-900 digital printing machine can quickly complete small batch orders without plate making. CMYK high resolution digital printing, with bright colors and low cost. It's widely used in corrugated cardboard, paper bag, paper cus, pizza box, etc. Feactures Model EDS-900 Digital Printing Machine Printhead quantity 4-5 pcs Printing width 500-625mm Printhead model HP 841 (125mm) Printing platform Vacuum adsorption type Maximum material width 900mm Feeding method Leading edge feeding Ink color CMYK Printing resolution 1200x300, 1200x600, 1200x1200DPI Printing mode Single Pass File format PDF, TIFF, JPEG, AI, etc. Inkjet technology Thermal foaming Ink type Water-based dye ink Ink capacity 5000 ml

The EDS-1800 digital printing machine can directly print full color on corrugated cardboard. It adopts advanced inkjet technology, doesn‘t require plate making, and can print clear and vivid images. It supports on-demand production, which can reduce waste, improve efficiency, and deliver orders quickly. Features Model EDS-1800 Digital Printing Machine Printhead quantity 5-12 pcs Printing width 625-1500mm Printhead model HP 841 (125mm) Printing platform Vacuum adsorption type Feeding width 1800mm Feeding method Leading edge feeder Ink color CMYK Printing resolution 1200x300, 1200x600, 1200x1200DPI Printing mode Single Pass File format PDF, TIFF, JPEG, AI, etc.

The EDS-2500 digital printing machine can achieve high quality and high resolution corrugated cardboard printing. Single pass digital printing, no need for plate making. It shortens the production cycle, reduces production costs, and is suitable for small batch carton orders. Features Model EDS-2500 Digital Printing Machine Printhead quantity 12-19 pcs Printing width 1500-2375mm Printhead model HP 841 (125mm) Printing platform Vacuum adsorption type Feeding width 2500mm Feeding method Leading edge feeder Ink color CMYK Printing resolution 1200x300, 1200x600, 1200x1200DPI Printing mode Single Pass File format PDF, TIFF, JPEG, AI, etc. Inkjet technology Thermal foaming Ink type Water-based dye ink

Apexto ASIC is a professional supplier with well-equipped testing facilities and strong technical force with a wide range of good quality asic miners ,reasonable prices , our products are extensively used in crypto miners and other digital industries .Buy Bitcoin & Dogecoin Miners with Exclusive Deals—Ship Immediately, Instant Profits. FOR ALL YOUR MINING NEEDS ,Apexto sells miners at great prices + 40percent discounts and can help you shorten Rol. Bitmain Antminer S21 XP+ Hyd (500Th) is an ASIC miner designed for SHA-256 algorithm, specifically targeting BTC (Bitcoin) . It delivers a maximum hashrate of 500Th/s while consuming 5500W of power, resulting in an energy efficiency of 11j/Th. Viber Chat : + 39 351 141 7833 Manufacturer Bitmain Model Antminer S21 XP+ Hyd (500Th) Weight 13800g Noise level 50dB Cooling Hydro cooling (OD10) Power 5500W Voltage 380-415V Interface Ethernet Temperature 20 - 50 °C Humidity 10 - 90 % Ship Now : DHL ,FeDex , UPS . Trade Assurance / Ali Pay SN Code / Test Video Available Full Cables + Manuals & Warranty -For Inquiries - - APEXTO ASIC MINERS - Viber Chat : + 39 351 141 7833 WhatsApp 24hrs : + 49 152 1599 4276 Customer's Protection Guaranteed.

Minimum Order: 1 bags

Commercial UV Water Sterilizer 15 GPM is designed for apartment complexes, hotels, resorts, industrial facilities, and OEM distributors who require high- capacity, reliable, and chemical-free water disinfection. This system is ideal for bulk procurement, providing consistent microbial safety and scalable installation for large-scale residential and commercial water systems. Why Choose WELGO Commercial UV Sterilizers High-Capacity Disinfection Treats up to 15 gallons per minute (GPM) per unit, suitable for medium-to-large water systems Eliminates up to 99.9% of bacteria, viruses, and pathogens Chemical-free operation ensures no taste or odor issues, preserving water quality Reliable and Durable Low-pressure UV lamps with 9,000–10,000 hours lifespan Durable stainless steel SS304/SS316 or HDPE chamber Integrated monitoring alarms for lamp replacement or system alerts

WELGO Compact UV Water Sterilizer 5 GPM is designed for residential complexes, hotels, OEM distributors, and large-scale water system integrators seeking space-saving, high-efficiency water disinfection solutions. This compact system delivers chemical-free UV sterilization, ensuring safe and compliant drinking water for multiple households or commercial units. Why Choose WELGO Residential UV Water Sterilizer High-Efficiency Disinfection Treats up to 5 gallons per minute (GPM), ideal for small-to-medium residential units Eliminates up to 99.9% of bacteria, viruses, and pathogens Chemical-free operation ensures no taste or odor issues Compact & Space-Saving Design Designed for tight spaces under sinks or utility rooms Modular design allows integration into larger water systems for multi-unit projects Perfect for developers or integrators seeking scalable bulk solutions Reliable Performance & Low Maintenance Low-pressure UV lamps with operational life of 9,000–10,000 hours Durable SS304/SS316 stainless steel or HDPE chambers resist corrosion