Offers to Sell

In the sealing business, one of the most common questions I hear from distributors and OEM partners is: “What’s the real difference between an O-ring and an O-ring cord? And when should I stock one versus the other?” It sounds like a simple question, but the answer touches on inventory strategy, application reliability, and even how you position yourself with end customers. Let’s break it down from the perspective of someone who has spent decades working. O-Rings: The Standard Workhorse An O-ring is exactly what most people picture: a circular seal with a round cross-section, molded to a specific size. Because they’re standardized, you can usually find them in stock, ready to ship. Why distributors like them: · Fast turnover: Common sizes move quickly, especially in automotive, hydraulic, and motor repair markets. · Easy installation: Drop it into the groove and you’re done. · Predictable performance: No joint, no splice, just one continuous molded piece. If you’re supplying to industries like automotive engines, hydraulic pumps, electric motors, or industrial robots, O-rings are the bread and butter. O-Ring Cords: The Flexible Problem-Solver Now, O-ring cords (sometimes called elastomer cords) are a different story. Think of them as “semi-finished” products: long lengths of rubber cord with a circular cross-section. You cut the length you need, bond the ends, and you’ve got a custom O-ring. Where they shine: · Large diameters: Imagine a wind turbine shaft or a chemical reactor—no one keeps a 2‑meter O-ring in stock. A cord solves that. · Non-standard sizes: When a customer calls with an odd dimension, you don’t need to wait for tooling. · Inventory efficiency: One spool of cord can cover dozens of potential diameters. Of course, the trade-off is the joint. The way you bond the ends—cold bonding for quick fixes, hot vulcanization for critical applications— determines how reliable the seal will be. Materials and Performance Both O-rings and cords are made from the same families of elastomers: · NBR (Nitrile) for oil resistance in pumps and gearboxes. · FKM (Viton®-type fluoroelastomers) for high temperature and aggressive chemicals. · EPDM for water and steam systems. · VMQ (Silicone) for appliances and low-temperature flexibility. The difference isn’t the rubber itself, but the form. A molded O-ring has no weak point. A cord, on the other hand, introduces a joint, and that’s where experience and process matter. Installation Notes from the Field · O-Rings: Don’t overstretch them, don’t twist them, and make sure the groove is free of burrs. Simple, but often overlooked. · O-Ring Cords: Cut cleanly, bond carefully. For large diameters, hot vulcanization is worth the extra step. It saves headaches later when the equipment is under pressure. Real-World Scenarios · Automotive distributor: Stocks thousands of O-ring sizes because mechanics need them immediately. · Wind power supplier: Keeps O-ring cords on hand to cut and bond seals for turbine shafts. · Chemical plant maintenance team: Uses o ring cords for oversized flanges where downtime is costly and waiting for a custom mold isn’t an option. FAQ Q1: Should I stock both? A: Yes. O-rings for fast-moving, standard demand; cords for flexibility and emergency coverage. Q2: Are bonded cords reliable? A: They can be. Cold bonding works for low-pressure, static seals. For dynamic or high-pressure systems, hot vulcanization is the safer choice. Q3: How do I reduce after-sales risk? A: Work with a supplier that doesn’t just sell rubber, but also provides technical guidance. At DEDE, we often help partners choose the right material and bonding method, which cuts down on warranty claims. How DEDE Supports Partners Over the years, DEDE has built a service model that goes beyond simply shipping parts: · Standard parts, fast delivery: With more than ten thousand specifications of O-rings, oil seals, and related products in stock, urgent orders can be filled without delay. · Customized solutions: From material selection and groove design to production and testing, we provide full support for non-standard sealing requirements. · Technical empowerment: With over 30 years of industry experience, our engineers help optimize sealing systems, reduce maintenance costs, and improve equipment reliability. Why Distributors Trust DEDE DEDE is not just a trading company—it’s a manufacturing-based enterprise with deep roots in sealing technology. Some highlights: · Recognized as a leader in the sealing industry. · Comprehensive inventory: full range of models, ready to ship. · Products exported to 80+ countries. · Long-term cooperation with global brands. · Certified as a Provincial Technology Innovation Center, Specialized and Innovative Enterprise, and High-Tech Enterprise. · Part of a leading industrial cluster in sealing technology. At the end of the day, the difference between O-rings and O-ring cords comes down to standardization versus flexibility. O-rings are the reliable, off- the-shelf solution. O-ring cords are the adaptable option when size or speed matters. For distributors and wholesalers, the smartest strategy is to carry both— lean on O-rings for everyday demand, and keep cords as your safety net for non-standard or urgent cases. With DEDE’s combination of stock availability, customization, and technical support, you can meet customer needs quickly while protecting your reputation in the market.

Minimum Order: 1000

qingdao factory liquid crystal for PDLC Switchable film Established in 2007, Qingdao QY Liquid Crystal Co., Ltd is a leading manufacturer specializing in high-quality nematic liquid crystals, primarily used in PDLC smart film and high grade of LC display. With over 18 years of nematic liquid crystals production expertise. Our LCs are widely exported to Europe, the United States, South Korea, and other global markets. The capable of our producing approximately 5000 kilograms per month. We signed the Exclusive Agency Agreement with our South Korean customer from 2011

Minimum Order: 20 square metres

We deliver stunning light festivals that turn venues into must-visit destinations. With over 50 festivals annually across 20 countries, we know how to create experiences that keep visitors coming back for more.

Minimum Order: 1 bags

1.High-tech laser machine, combine fiber and CO2 together. 2. More powerful functions and wider processing range.  Capable of cutting both non-metal and metal, able to cut thick metal sheets, acrylic and wood, etc. 3. Factory standardized production, reasonable price. 4. Widely used, satisfying the processing demands of diverse industries. Technical parameters Model                                                        SL-1313CF Laser type  Fiber+ CO2  Laser power  1000W / 1500W / 2000W + 300W(co2 laser tube, optional: 150W / 180W / 220W) Working area  1300*1300mm Fiber Cutting speed  0-60m/min CO2 cutting speed 0-30m/min Transmission  gear rack  Driving system  Servo motors  Cooling mode  Industrial circulation water chiller  Working voltage 220V 2 phase / 380V 3 phase Why Choose Sieme Mixed Laser Cutting Machine? Versatility Mixed laser cutting machine combines CO2 and fiber laser technology, capable of cutting a variety of materials, such as metal and non-metal materials, providing a wide range of application options. High Efficiency Our equipment can quickly switch when cutting different materials, improving production efficiency and reducing equipment switching time. Cost-effectiveness A mixed laser cutting machine can complete multiple tasks, reducing the cost of purchasing multiple devices, suitable for small and medium-sized enterprises and diversified production needs. High Precision Mixed laser cutting machine can achieve high-precision cutting and ensure the quality of finished products, especially suitable for industries that require fine processing. Sieme CNC Equipment ensures the quality of the equipment and provides you with perfect after-sales service to ensure worry-free production.

GS3015 is equipped with fiber laser device,2 exchangeable working table,power from 1kw to 6kw and specially used for cutting 0.4-25mm steel plate.It is a kind of metal sheet cutting machine which has passed the CE from TUV,FDA,ETL. 6KW Metal Laser Cutting Machine Features: 1.It adopts advanced branded optical fiber laser core technology,good optical mode,stable performance. 2. High efficiency of photoelectric conversion,twice of domestic laser source. 3. Low heat of laser source,only needing 5P water cooling machine,saving electricity. 4. The gantry flying light path design,light operation,saving about 40% electricity than competitors. 5. Achieve a perfect cutting effect by only blowing compressed air during processing,which can largely reduce costs of auxiliary gas such as Oxygen.Nitrogen about thousand dollars, 6. Equipped with centralized lubrication system to make the machine run more stable. 7.Axial positioning accuracy of workbench: ≤±0.03㎜/m 8.Repetitive positioning accuracy of workbench: ≤±0.03㎜/m   Technical Parameter of Laser Metal Cutting Machine with exchange table  Machine model GS3015 GS4020 GS6025 Laser power 1000W 2000W 3000W 4000W 6000W 8000W(Optional) Dimensions 8150*2825*2125mm 10750*3350*2310mm 15000*4018*2755mm Working area 3000mm*1500mm 4000mm*2000mm 6000mm*2500mm Repeat positioning accuracy ±0.02mm Maximum speed 180m/min Max. acceleration 1.5G Voltage and frequency 380V 50Hz/60HZ Advantages of Laser Metal Cutting Machine High-precision and high-quality cutting Laser metal cutting machine can achieve high-precision cutting with smooth cuts without further processing. Suitable for precision parts manufacturing. High-speed cutting Laser cutting is fast and can significantly improve production efficiency, especially suitable for mass production and rapid prototyping. Multi-material compatibility Laser metal cutting machine is suitable for a variety of metal materials, such as stainless steel, aluminum, copper, brass, etc., to meet different manufacturing needs. Strong flexibility Sieme laser cutting machine can easily achieve complex graphics and shape cutting, suitable for diversified production requirements.

The smoke produced by cutting can be filtrated inside, it's non-polluting and environmentally friendly.  High Power Fiber Laser source   GH series fiber laser cutting machine used to thick sheet cutting, Equipted with power from 8000Watt to 20KW. There are the hotest sale fiber source for your reference.Such as IPG,Raycus,Max. The photoelectric conversion rate is high, saving the use cost. The light path is simple and maintenance-free.  The mechanical design is simple and it is easy to integrate with the robot. Light weight and small footprint 2.BLT 6 Series smart cutters are especially developed for ultra-high power laser equipment (max of 40kw). Brand new beam path design and optimized optical lens bring you great performance with stable cutting, simple installation and setup, and double dust prevention. The Smart Piercing and Auto Recut features, meeting the highly demanding standard of air as well as N2 high-power cutting, considerably improve efficiency and yield. 3. Machine bed  The Segmented Rectangular Tube Bed The internal structure of the bed adopts the aircraft metal honeycomb structure, which is welded by a number of rectangular tubes. Stiffeners are arranged inside the tubes to increase the strength and tensile strength of the bed.  It also increases the resistance and stability of the guide rail resulting in to effectively avoid the deformation of the bed. High strength, stability, tensile strength, ensuring 20 years of use without distortion; Thickness of rectangular pipe wall is 10mm and the bed alone weights 4500 kg. Cast aluminum beams: 1. The design of the cast aluminum process, after artificial aging and solid solution treatment and thick finishing,  is a measure of hardness that can reach the T6 standard, and has the characteristics of corrosion resistance,  oxidation resistance, toughness and ductility. 2. Light weight, convenient for high-speed movement during processing.  At the same time, it has the characteristics of high speed and flexibility.  Under the condition that accuracy is met, the processing speed can be greatly improved Applicable Industry: This machin is widely used in various industries such as advertising decoration,kitchen ware,engineering machinery,steel and iron,automobile,metal plate chassis,air-conditioner manufacturing,metal plate cutting,etc.   Applicable Materials: Professional used to cut thin sheet metal, stainless steel, carbon steel, aluminum alloy plate, galvanized sheet, electrolytic plate, silicon steel, titanium alloy, aluminium zinc plate and other metal

BHJG250 pipe bucking machine unit has six parts: driving clamp system、backup clamp system、hydraulic system、pneumatic system、manipulating platform and frame base. The Driving clamp is driven by hydraulic motor and it is used to screw on (screw off) . The t can be positive and negative direction of rotation to meet the requirements of make-up or break-out. Torque up to 68kN. M. The Buckup clamp is driven by pneumatic cylinder and it is used to fix the pipe. the screw on torque value is output by tension sensor and controlled by PLC system. The Max. drift diameter of the bucking machine is 250mm, which can finish the make-up or break-out of 2 7/8″～8 5/8″ casing, tubing and drill pipe. Product Application  Pipe bucking machines produced by our company is special equipment used to screw on and off the casing, tubing and drill pipe coupling.

QK1330 CNC Pipe Threading Machine is an efficient, high-precision two coordinate continuous control CNC machine independently researched and developed by our company according to the development needs of petroleum industry. The machine has high power, good rigidity, can cut straight, oblique, arc, male, inch thread, and has a variety of functions such as tip radius compensation. This machine highlights the characteristics of high rigidity and high power, and is a high precision and high efficiency pipe thread machining machine. With the latest innovative design, the pipe can be completed by radial and axial feed of the tool. A variety of applications, such as pipe beveling, facing, edging, deburring, tapering and threading, can be performed on the inside and outside of pipes without changing tools for different angles or shapes.   Product Application 1. The CNC Pipe Threading Equipment can be used for rough machining and finishing machining of mechanical parts, especially suitable for petroleum, mining, machinery and other industries, for high-efficiency, high-volume, high- precision processing of rotary parts. 2. The machine can process steel, cast iron and non-ferrous metals and other materials. 3. The machine is also suitable for small and medium-sized batches of shaft, plate parts of the internal and external cylindrical surface, cone, thread, drilling, reaming and curve turning parts. The machining accuracy is up to IT7 and the surface roughness of the machined workpiece is up to Ra1.6.

MPP pipe jacking, also same name is MPP high voltage power cable protection pipe, is divided into excavation and trenchless. It is made of modified polypropylene as main raw material and added with necessary additives and extruded to form pipes. Advantage MPP pipe jacking has the characteristics of high temperature resistance, external pressure resistance, excellent electrical insulation, light and smooth pipe, small friction force, and hot butt welding.It is suitable for over 10kV High voltage transmission line cable pipe material.The long-term usage temperature is-5~70℃.The common specifications of MPP power pipes are 110mm~250mm diameter, divided into common and reinforced type.The ordinary type is suitable for excavation and construction and trenchless through construction with less than 4M buried depth.The reinforced type is suitable for Trenchless crossing construction with buried depth greater than 4M.

Casing thread protectors are caps protect Casing threads and seals during loading, unloading, transportation and storage Advantage The Casing Thread Protectors has clear thread. Nice and smooth surface. We can produce premium Casing thread protector and customize. The main function The Casing Thread Protectors are designed to provide protection to the connections during handing transportation, and to prevent dust and debris entering the threads and tube body. The threads are made in such a manner that they cover all the threads of the connections and prevent the Casing thread protector from stripping or vibrating loose. How to use? In the process of transporting Casing in the oil field, the worker screws the Casing thread protector on Casing both ends according to the corresponding thread type and size.

Drill Pipe Protectors (DPP) are reinforced molded rubber pads that fit around the outside diameter of the drill pipe to provide a one-time downhole wear surface between the inside diameter of the casing and the drill string. DPP protects the casing ID from wear caused by the drill string. The most common applications are deviated wells, deep holes, fast rotation, high torque and offshore applications. DPP Main features Provides a sacrificial wear surface. Hinged canister for easy installation. Top and bottom tapered shoulders. Available in grooved and smooth designs. NBR and XNBR compounds available Application inclined shaft deep hole Drill holes at fast rotational speeds under high torque offshore Pipe Thread Protector Available Materials: lightweight plastic Only available in open design Designed for the environment The most economical option Made of polyethylene grey heavy duty plastic Only available in closed design Made of polyethylene

Over the years, I’ve lost count of how many times distributors, wholesalers, and even maintenance engineers have asked me the same thing: “What’s the difference between an O-ring and an O-ring cord? Which one should I keep in stock?” It’s a fair question. At first glance, they look similar, both are round in cross-section, both made from elastomers. But in practice, the choice between the two can affect your inventory strategy, your customer’s downtime, and even your reputation as a supplier. Let me walk you through it the way I usually explain it at trade shows or during factory visits. O-Rings: The Everyday Standard Think of O-rings as the “ready-to-go” solution. They’re molded into precise sizes, standardized across the industry, and available in thousands of specifications. · Stock advantage: If you’re a distributor, you know the drill, common sizes move fast. Automotive repair shops, hydraulic service centers, gearbox rebuilders, they all need them yesterday. · Applications: Engines, pumps, motors, industrial robots, even household appliances. Anywhere a groove is cut to a standard dimension, an O-ring is the natural fit. · Ease of use: No cutting, no bonding. Just drop it in the groove, lubricate if needed, and you’re done. O-Ring Cords: The Flexible Fixer O-ring cords are a different animal. They come as long spools of rubber cord, same round cross-section, but not closed. You cut the length you need, bond the ends, you’ve got a custom O-ring. · Large diameters: Picture a wind turbine shaft seal. Nobody keeps a 1.5‑meter O-ring on the shelf. A cord solves that. · Odd sizes: A chemical plant calls with a flange dimension you’ve never seen before. Instead of saying “lead time six weeks,” you cut a cord and bond it. · Inventory efficiency: One roll of cord can cover dozens of diameters. That’s a lifesaver for distributors who don’t want to tie up capital in slow- moving stock. Materials and Craftsmanship Both O-rings and cords use the same elastomers: · NBR (Nitrile) for oil resistance in pumps and gearboxes. · FKM (fluoroelastomer) for high temperature and aggressive chemicals. · EPDM for water and steam. · Silicone for low-temperature flexibility and appliances. The real difference is in the joint. A molded O-ring has no weak point. A cord does, and that joint is where experience matters. Cold bonding is quick and fine for static, low-pressure seals. Hot vulcanization takes longer but gives you a joint that can handle pressure and movement. Installation Tips · O-Rings: Don’t overstretch them, don’t twist them, and keep the groove clean. Simple advice, but I’ve seen too many failures from ignoring it. · O-Ring Cords: Cut square, bond carefully. For large diameters, hot vulcanization is worth the effort. A sloppy joint will come back to haunt you. FAQ Q1: Should I stock both? A: Yes. O-rings for the fast-moving, everyday demand. Cords for emergencies and non-standard jobs. Q2: Are bonded cords reliable? A: They can be. For static, low-pressure applications, cold bonding is fine. For dynamic or high-pressure, hot vulcanization is the safer bet. Q3: How do I avoid after-sales headaches? A: Work with a supplier who doesn’t just ship rubber but also provides technical guidance. At NQKSF, we often help partners choose the right material and bonding method, which reduces warranty claims and keeps customers loyal. From my side, what makes NQKSF stand out is not just the product range but the way we support partners: · Standard parts, fast delivery: Over ten thousand specifications of O-rings, oil seals, and related seals in stock. Urgent orders? We can ship immediately. · Customized solutions: From material selection and groove design to production and testing, we help create seals that match the exact working conditions. · Technical empowerment: With more than 30 years in the sealing industry, we don’t just sell parts—we help optimize sealing systems, reduce maintenance costs, and improve equipment reliability. Why Distributors Trust Us NQKSF is not just a trading name. We are a manufacturing-based enterprise with recognition as: · A leader in the sealing industry. · A company with full model coverage and strong stock availability. · An exporter to 80+ countries worldwide. · A long-term partner to global brands. · Certified as a Provincial Technology Innovation Center, a Specialized and Innovative Enterprise, and a High-Tech Enterprise. · A front-runner in a specialized industrial cluster. So, what’s the difference between O-rings and O-ring cords? In simple terms: O-rings are the standardized, off-the-shelf solution. O-ring cords are the flexible, cut-to-fit option when size or urgency demands it. For distributors and wholesalers, the smart play is to carry both. Let O-rings handle the daily demand, and keep cords as your ace in the hole for non- standard or emergency cases. With NQKSF’s combination of stock, customization, and technical support, you’re not just selling seals—you’re building reliability into your customer’s equipment and trust into your business relationships.

Minimum Order: 1000

Detailed Explanation of Fischer-Tropsch Wax Application in PVC: 1. Primary Function: Serves as an external lubricant During PVC processing (such as extrusion, calendering, injection moulding), the polymer melt undergoes friction and adhesion with the metal surfaces of processing equipment (e.g., screws, barrels, moulds) at elevated temperatures. The lubricant's role is to reduce this friction and adhesion. Function of Fischer-Tropsch wax: As a typical external lubricant, Fischer- Tropsch wax exhibits low compatibility with PVC. During processing, it migrates from the PVC melt to its surface, forming a thin lubricating molecular layer between the melt and metal equipment. Benefits: Reduced processing energy consumption: Minimises friction, lowering equipment drive power requirements. Prevents melt fracture: Reduces shear stress, preventing material degradation from excessive shear. Facilitates demoulding: Effectively prevents products from adhering to moulds during injection moulding or calendering. Enhances production line speed: Superior lubricity permits higher processing speeds.

We are the real Mining locomotive factory in china, we could provide you with E-online chat to show your our factory! Trolley Locomotive is applied in the railway transporation for tract wagons,people and other things.The max traction capacity of a 5 ton trolley locomotive could up to 50 ton. C: Locomotive for coal mining J: Trolley electric locomotives Y: Single-end driver's cab G: Steel wheel,resistor for speed control GB: Steel wheel,chopping wave for speed control Product Description 5t Flameproof Tunneling Mining Trolley Locomotive Manufacturer Supplies Price Adhesive / total weight (t) 5 ton Track gauge (mm) 500.600,762 or 900 Traction (KN) 6.1kN/ 5.74kN Max. Traction (KN) 7.36kN Speed(km/h) 10.6km/h/ 7.5km/h Voltage 250 Power (KW) 7.5KW*2 Dimensions Length(mm) 2700mm/ 2750mm Width(mm) 940,1082 or 1220mm Height(mm) 1550 Wheelbase (mm) 816mm/ 850 mm Wheel diameter (mm) Φ650mm/ Φ520 mm Min Curve radius (m) 5.7-6 m Controller Resistance or IGBT Braking method Mechanical or Hydraulic Brake 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. 1.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. 2.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. 3.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 4.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. 5.Quality Control: We have our own experienced QC. There will be strict inspection and testing for every order before shipping out. 6.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