China Products List

Category:Hardware & Tools/Seals & Gaskets/Other Seals

Product Description:Dalian Songqian Trading Co., Ltd. is a comprehensive sealing technology service provider with over 20 years of industry experience. We are a full-range supplier of general sealing technology, with extensive expertise in many fields such as mechanical engineering, hydraulics, transmission and electronic technology, equipment engineering, chemical industry, process engineering, and the automotive industry.As a nationwide company, our success is built on close connections with customers and the market.Our sales engineers strive to find solutions for every application through our customer service and innovation capabilities, providing you with professional technical services and highly cost-effective sealing products.Choosing us means choosing satisfaction and peace of mind!The sealing brands we distribute include Germany's Dichtomatik, Freudenberg, Merkel, Simrit, Japan's NOK, America's Greene Tweed, Italy's CARCO, America's MARCO, America's Garlock, America's DuPont, Netherlands' ERIKS, Germany's KWO, Parker, MPI, Mattei, Merkel, Japan's NOK, B+S, Trelleborg, Europe and America's CR, GMORS, NAK, CTY, and more. Our main sealing products include: O-rings, X-rings, rectangular rings, ED rings, skeleton oil seals, US gaskets, imported combined sealing washers, fluid joint seals, expansion rings, Step seals, Glyd rings, DAS combined seals, U-rings, YX rings, Y-rings, dust seals, GYTON fluororubber reduction furnace gaskets, PTFE high-voltage insulation sleeves, imported carbon fiber packing, large diaphragms for dust removal pulse valves, guide wear-resistant belts, rotary seals, spring tension seals, expanded PTFE products, asbestos boards, non-asbestos boards, packing, sealing products for shield machines, and more. more>

Category:Hardware & Tools/Fasteners & Connectors/Other Fasteners & Connectors

Product Description:Scratch-off cards, also known as peel-off cards, include lottery scratch cards, prize reveal cards, and redemption coupons. These types of cards are typically made by laminating two layers of 250g whiteboard paper (some customers may have special requirements, such as using coated paper and adhesive paper). One side of the coupon features a tear-open or peel-open design.Scratch card manufacturers produce scratch cards for various industries, including liquor scratch cards, wine scratch cards, beverage scratch cards, cosmetics scratch cards, paint scratch cards, electrical appliance scratch cards, coating scratch cards, voucher scratch cards, main and duplicate coupon scratch cards, mall prize reveal cards, supermarket scratch cards, department store scratch cards, shopping scratch cards, tea bar scratch cards, fertilizer lottery cards, water ticket scratch cards,餐饮 scratch cards, numbered scratch cards, automotive scratch cards, paper scratch cards, inkjet-printed scratch cards, adhesive password cards, password scratch cards, prize scratch cards, tear-open scratch cards, ready-made scratch cards, QR code scratch cards, bagged scratch cards,二维码 scratch cards, scan-to-redeem scratch cards,喷码 scratch cards, adhesive scratch cards, and mall lottery cards.Applicable industries include retail and wholesale, shopping malls and supermarkets, food and dairy, alcoholic and beverage, daily chemicals,餐饮, jewelry, home appliances, clothing and footwear, postal and telecommunications, building materials, feed, agricultural products, and more. more>

Category:Hardware & Tools/Pipe Fittings/Tee Fittings

Product Description:Specializing in the manufacturing and sales of anti-corrosion electromechanical equipment, providing integrated solutions for the design and installation of steel-lined pipe fittings. more>

Category:Hardware & Tools/Cutting Power Tools/Drill Bits

Product Description:Dongguan Shuangren Machinery Equipment Technology Co., Ltd. was established in July 2010 as a company specializing in the research, development, design, manufacturing, sales, and service of automated lithium battery production equipment.From its inception, the company established excellent pre-sales and after-sales service standards. It has comprehensively built a modern management system, making all aspects of the company's management scientific, procedural, and process-oriented.In the industrialization process of lithium battery production equipment, the company has always placed great emphasis on brand building and technological research and development, continuously increasing R&D investment to produce highly stable manufacturing equipment. To date, it has acquired the capability to research, develop, and manufacture complete sets of lithium battery production equipment for square aluminum shell power batteries, soft-pack batteries, and other series.As a supplier in the field of lithium battery equipment, Dongguan Shuangren Machinery Equipment Technology Co., Ltd. leverages extensive industry experience and solid technical expertise to provide customers with a variety of lithium battery equipment and technical services. We are committed to promoting the development of green energy and contributing to environmental protection. The company focuses on the production of high-precision, high-quality lithium battery equipment, paying attention to every detail and striving for excellence to create superior lithium battery production equipment for our clients.Main Products:Lithium Battery Rivet Pulling MachineBattery Rivet Pulling MachineBattery Plastic Rivet Pulling MachineAutomatic Plastic Rivet Replacement MachineNew Energy Battery Sealed Rivet Pulling MachineAluminum Shell Battery Rivet Pulling MachineNew Energy Aluminum Battery C4 Sealing Rivet Pulling MachineNew Energy Battery Rivet Pulling MachineSquare Battery Plug Rivet Pulling Machine----------------------------------------------------------------------Company Name: Dongguan Shuangren Machinery Equipment Technology Co., Ltd.Address: Shilongkeng Industrial Zone, Liaobu Town, Dongguan City more>

Category:Hardware & Tools/Cutting Power Tools/Drill Bits

Product Description:Product Name: Fully Automatic Coffee Cup Welding MachineProduct Model: SR202Equipment Function Introduction: Used for automatic welding of coffee cups and filter paper, includes automatic cup feeding mechanism, automatic rotary welding mechanism, CCD visual inspection for automatic rejection of defective products, and automatic cup collection and stacking mechanism.Minimum Order Quantity: 1 unit; Supply Quantity: 20 units; Packaging Description: Wooden case packagingCompany Introduction:"Dongguan Shuangren Machinery Equipment Technology Co., Ltd." was established in July 2010. It is a company specializing in the research, development, manufacturing, and service of automated lithium battery production equipment. It possesses the capability to develop and manufacture a series of production equipment for square aluminum shell power batteries, soft-pack batteries, and more. We not only manufacture equipment but also focus on collaborating with customers to improve battery production processes, helping them enhance product yield and capacity. Our team has extensive practical experience in the industry and a deep understanding of battery production processes and equipment. We hope our dedicated service creates greater value for you! Main products include: fully automatic wrapping and laminating machines / fully automatic steel ball sealing machines / fully automatic nail changing, automatic nail pulling, and automatic nail inserting machines / fully automatic glue nail sealing machines / fully automatic helium leak detection machines / PACK assembly lines;"Technological innovation, never stopping; dedicated service, creating value" is the eternal theme of "We, Shuangren"!Focusing on power battery production equipment and power battery PACK automated assembly line solutions.-------------------------------------------------------------------------------------------------------------------------Company Name: Dongguan Shuangren Machinery Equipment Technology Co., Ltd.Address: Shilongkeng Industrial Zone, Liaobu Town, Dongguan City more>

Category:Hardware & Tools/Pipe Fittings/Tee Fittings

Product Description:<img src="https://img-i-album.toocle.com/view/2025/06/30/6e/6862056787e6e.png" style="max-width:100%;"/> more>

Category:Hardware & Tools/Cutting Power Tools/Drill Bits

Product Description:Dongguan Shuangren Machinery Equipment Technology Co., Ltd. is a company that emphasizes technological innovation. The company has a professional R&D team that continuously explores new technologies and processes to provide customers with innovative and competitive lithium battery production equipment. At the same time, the company also focuses on communication and cooperation with customers, constantly improving products and services based on customer needs and feedback.Product Name: Fully Automatic Coffee Cup Welding MachineProduct Model: SR202Equipment Function Introduction: Mainly used for the automatic welding of coffee cups and filter paper, including an automatic cup feeding mechanism, automatic rotary welding mechanism, CCD visual inspection to automatically reject defective products, and an automatic cup collection and stacking mechanism.Single-machine production capacity ≥ 100,000 units/day, yield rate ≥ 99.8%.Main Technical Features of the Equipment:1. Automatic Cup Feeding Mechanism: Operators only need to place the boxed materials at the feeding position. Compared to the previous method of manually placing cup tubes into the feeding tube, this is more convenient and efficient, significantly reducing manual operation processes.2. Automatic Filter Paper Feeding Mechanism: Utilizes a 4-channel die-cutting system to achieve automatic paper roll collection and release, as well as automatic position correction. Each station can detect the presence of filter paper and automatically replenish it, effectively reducing downtime.3. Automatic Welding Mechanism: Adopts a 16-station (4*4) rotary structure, with feeding, filter paper placement, welding, and unloading performed simultaneously. Ultrasonic welding uses pressure-automated control to ensure constant welding pressure, resulting in strong and aesthetically pleasing welds.4. CCD Visual Inspection: Equipped with 2 sets of high-definition industrial cameras. The inspection system can detect defects during the belt operation and reject defective products into a defective product bin.5. Automatic Collection Mechanism: Capable of automatically flipping and nesting cup bodies. Equipped with counting sensors, it allows setting the number of stacked cups and the number of boxes per container.6. Equipment Operability: Configured with imported brand PLCs, all motion mechanisms use servo motors. The operation interface is intuitive and straightforward, with easy functional parameter settings, ensuring safe and stable equipment operation.Minimum Order Quantity: 1 unit. Supply Quantity: 20 units. Packaging Description: Wooden case packaging.Main Products:Large Cylindrical Batteries / Square BatteriesAutomatic Plug Pin Removal Machine (Filling Pin) / Restraint MachineAutomatic Helium Filling and Pin Insertion Machine (Sealing Pin) / Wiping MachineFully Automatic Coffee Cup Welding MachineAutomatic Wrapping and Laminating MachineAutomatic Steel Ball Sealing MachineRestraint Application and Removal MachineAutomatic Pin Changing Line, Automatic Pin Removal, Automatic Pin Insertion MachineAutomatic Glue Pin Sealing MachineAutomatic Helium Leak Detection MachinePACK Assembly Line"Technological innovation, never stopping; dedicated service, creating value" is the eternal theme of "We Shuangren"!Focusing on power battery production equipment and power battery PACK automatic assembly line solutions.---------------------------------------------------------------------------------------------------------Company Name: Dongguan Shuangren Machinery Equipment Technology Co., Ltd.Address: Shilongkeng Industrial Zone, Liaobu Town, Dongguan City more>

Category:Hardware & Tools/Cutting Power Tools/Drill Bits

Product Description:Xinxiang Songjin Machinery Co., Ltd. is dedicated to the field of high-efficiency and energy-saving heat exchange tubes. The integrally formed finned tubes developed by the company are at the world's leading level. The integrally formed spiral finned steel tubes use No. 20 steel pipes compliant with the GB/T3087-2008 standard for seamless steel tubes for low and medium-pressure boilers, or 20G steel pipes compliant with the GB/T5310-2017 standard for seamless steel tubes for high-pressure boilers as the base tubes. These are processed through hot-rolled fin tube machines via rolling and pressing to form spiral finned heat exchange tubes with an integrated structure of fins and base tubes.   Integrally formed spiral finned tubes are primarily used as next-generation heat exchange components in medium and high-pressure boiler economizers and air preheaters. They offer advantages such as "high efficiency, energy savings, cost-effectiveness, resistance to ash accumulation, wear resistance, long service life, and strong environmental adaptability." Compared to conventional bare tubes or high-frequency welded spiral finned tubes, the integrally formed spiral finned tubes produced by our company have the following technical advantages: 1. No welding required, longer service life. Integrally formed spiral finned tubes eliminate the need for welding, completely removing contact thermal resistance between the fins and the base tube and preventing fin loosening. They exhibit high efficiency, stability, and reliable heat transfer performance, with a longer service life, making them particularly suitable for harsh environments, such as economizers in circulating fluidized bed boilers with high flue gas velocity and hard particles. The weld adhesion rate of welded finned tubes is difficult to achieve at 100% and is challenging to inspect. Welding creates contact thermal resistance and requires post-weld thermal stress treatment. Long-term use can lead to weld cracking, causing fins to detach from the tubes and further increasing contact thermal resistance, which reduces heat transfer efficiency and necessitates tube replacement.If a crack gap is 0.1 mm, with air's thermal conductivity at 0.021 kcal/(m²·h·°C), the thermal resistance reaches 0.0045 m²·h·°C/kcal, equivalent to the thermal resistance of a 180 mm thick steel plate. Integrally formed finned tubes do not suffer from the issues associated with welded fins. Their service life matches that of the base tube material and is 3-4 times longer than that of high-frequency welded or brazed spiral finned tubes. Higher heat transfer efficiency. Taking economizers as an example, the total heat transfer coefficient on the flue gas side is generally no more than 100 kcal/(m²·h·°C), while the heat transfer coefficient on the water side inside the tubes is as high as 5000~10000 kcal/(m²·h·°C). Thus, the flue gas side plays a dominant role in the heat transfer process. According to the heat transfer formula Q = kFΔt, increasing the heat transfer area enhances heat transfer. Experimental test reports from the State Key Laboratory of Multiphase Flow at Xi'an Jiaotong University indicate that the heat transfer coefficient of integrally formed spiral finned tubes is 6~7 times that of bare tubes. Thermal performance test reports on finned tube bundles also show that the Nusselt number (Nu) of integrally formed spiral finned tube bundles is about 4 times that of bare tubes, with a significantly higher heat transfer coefficient and improved heat transfer performance. In contrast, research literature on welded spiral finned tubes indicates that their heat transfer coefficient generally does not exceed that of bare tubes by a significant margin, and the Nusselt number (Nu) of their tube bundles is about 4 times that of bare tubes. Additionally, integrally formed finned tubes do not suffer from the inherent contact thermal resistance and weld adhesion issues of welded tubes. The fin roots feature a small R smooth transition, and the fin cross-section has a trapezoidal structure. These characteristics make the heat transfer performance of integrally formed finned tubes significantly superior to that of high-frequency resistance welded and brazed spiral finned tubes. Reduced tendency for ash accumulation, slagging, and clogging. Removing ash, slag, and fouling from heat transfer surfaces is a critical maintenance task for heat exchange equipment such as economizers.Since the thermal conductivity of the ash and slag layer on the flue gas side of economizers is very low, even a thin fouling layer can create significant thermal resistance. Each millimeter of ash and slag layer is equivalent to a 400 mm thick steel wall. The presence of fouling thermal resistance not only reduces heat transfer but also significantly increases the tube wall temperature, leading to overheating and potential tube failure, which can cause accidents. The integrally formed finned tubes feature a small R smooth transition between the fin roots and the base tube, with a smooth surface that eliminates the ash accumulation, slagging, and clogging issues common in welded finned tubes due to folded and uneven fin roots. Even if some ash accumulates, it is easily blown off, ensuring effective heat transfer and improving operational economy. Higher tensile strength, pressure resistance, and wear resistance. Integrally formed finned tubes are produced by extruding and rolling thick-walled tubes, effectively subjecting the tubes to an additional high-temperature rolling process.Safety performance evaluation reports from the China Special Equipment Inspection and Research Center and comprehensive technical inspection reports from the National Steel Product Quality Inspection Center indicate that the integrally formed spiral finned tubes produced by our company exhibit higher longitudinal tensile strength, yield strength, and hardness compared to the base tubes, i.e., the national standard boiler steel tubes 20 and 20G, though with a reduction in elongation. The increased hardness enhances the wear resistance of the integrally formed finned tubes, particularly the improved hardness of the fins, which is beneficial for resisting erosion by flue gas dust. This addresses the severe wear issue in fluidized bed boilers caused by high flue gas velocity and hard particles. The reduction in elongation, i.e., decreased plasticity, does not affect the use of the finned tubes, as manufacturing economizers with these tubes does not require tube bending (only end welding), and high plasticity is not a critical requirement. In summary, integrally formed finned tubes represent a new manufacturing method for spiral finned tubes and can be considered, within certain applications, as the next-generation product replacing high-frequency welded and brazed spiral finned tubes. The integrally formed finned tubes produced by our company have undergone comprehensive technical testing and evaluation by multiple national relevant agencies, meeting or exceeding the relevant standards for steel tubes used in the boiler industry. In terms of the quality assurance system, the company strictly adheres to the established "Integrally Formed Spiral Finned Steel Tube Production Process Operating Procedures," which cover specifications for processing machinery and equipment, operational procedures, raw material procurement, and product inspection. more>

Category:Hardware & Tools/Pipe Fittings/Tee Fittings

Product Description:Small Cylinder Gizzard Oil Removal Machine is a compact device designed for removing fat from chicken gizzards, and it can also be used to clean duck gizzards, goose gizzards, and more. It effectively removes impurities and debris. This machine operates quickly and requires no special manual handling, completing the cleaning process in about a minute. After cleaning, simply open the small door on the side for automatic discharge. The removed fat or waste flows out through the drainage port, separate from the cleaned gizzards, making organization straightforward.<img src="https://img-i-album.toocle.com/view/2025/07/19/19/687b3c7b8bc19.jpg" style="max-width:100%;"/>Small Cylinder Gizzard Oil Removal Machine This machine is ready to use once powered on. Its specialized cleaning method ensures that chicken gizzards and duck gizzards are not squeezed during the process, as it is designed based on the characteristics of gizzards. The rubber rods in the machine feature a full-thread structure, providing thorough friction during cleaning for a more effective and cleaner result.<img src="https://img-i-album.toocle.com/view/2025/07/19/78/687b3c853e278.jpg" style="max-width:100%;"/>Small Cylinder Gizzard Oil Removal Machine This machine has a diameter of 60 cm and can process up to 20 kg per batch, with a cleaning time of about one minute. The entire process is simple and can replace labor-intensive manual cleaning. After the fat is cleaned off, the gizzard skin does not become slippery during peeling, making it easier to remove. It can be used in combination with a peeling machine, offering ease of use and durable quality.<img src="https://img-i-album.toocle.com/view/2025/07/19/b1/687b3c908f0b1.jpg" style="max-width:100%;"/> more>

Category:Hardware & Tools/Pipe Fittings/Tee Fittings

Product Description:Shanghai Tuoding Hydraulic Machinery Co., Ltd. supplies a large quantity of petrochemical hose station connectors HC15-1/HC15-2/HC15-3/HC15-4, HC20-1/HC20-2/HC20-3/HC20-4, HC25-1/HC25-2/HC25-3/HC25-4, HC40-1/HC40-2/HC40-3/HC40-4, HC50-1/HC50-2/HC50-3/HC50-4, HC65-1/HC65-2/HC65-3/HC65-4, HC80-1/HC80-2/HC80-3/HC80-4, QJB15-1/QJB15-2/QJB15-3/QJB15-4, QJB20-1/QJB20-2/QJB20-3/QJB20-4, QJB25-1/QJB25-2/QJB25-3/QJB25-4, QJB40-1/QJB40-2/QJB40-3/QJB40-4, QJB50-1/QJB50-2/QJB50-3/QJB50-4, QJB65-1/QJB65-2/QJB65-3/QJB65-4, QJB80-1/QJB80-2/QJB80-3/QJB80-4, QJA15-1/QJA15-2/QJA15-3/QJA15-4, QJA20-1/QJA20-2/QJA20-3/QJB20-4, QJA25-1/QJA25-2/QJA25-3/QJA25-4, QJA40-1/QJA40-2/QJA40-3/QJA40-4, QJA50-1/QJA50-2/QJA50-3/QJA50-4, QJA65-1/QJA65-2/QJA65-3/QJA65-4, QJA80-1/QJA80-2/QJA80-3/QJA80-4Materials: 1Cr13, 20#, H62, 304, 316, 316L, 321, lever-type quick couplings Type A, B, C, D, E, F, DC type, DP type quick couplings, hose connectors, purge connectors, petrochemical hose quick couplings, stainless steel sampling connectors. Large inventory is always available. Welcome to discuss and purchase. more>

Category:Hardware & Tools/Cutting Power Tools/Drill Bits

Product Description:Benefits of Using Triple-Start Threaded Tubes in Heat Exchange Equipment:(1) Simultaneous enhancement of heat transfer inside and outside the tube;(2) Fast processing speed, excellent results, and low cost;(3) Wide applicability: enhances heat transfer for evaporation, condensation, gaseous flow heat transfer, and liquid flow heat transfer both inside and outside the tube;(4) Self-adjusting capability with thermal expansion and contraction;(5) Reduced scale formation.I. Product Introduction:Since Luwsun et al. from the United States published the first academic report on threaded tubes in 1966, threaded tubes have garnered significant attention as high-efficiency heat exchange components. They are now increasingly widely used in China. Threaded tubes are heat-conducting tubes with internal convex and external concave spiral shapes, manufactured by cold-rolling ordinary smooth tubes. They are suitable for use as heat exchange tubes in equipment such as boilers, condensers, low-pressure heaters, oil coolers, and air coolers.II. Advantages:1. Application in boilers: After optimization for heat exchange and flow resistance, the heat transfer capacity of one threaded tube is equivalent to 1.7–1.8 ordinary steel tubes of the same size. This not only significantly reduces the number of steel tubes required but also allows for a smaller boiler shell diameter. As a result, steel consumption for pressure components is markedly reduced, saving materials and lowering costs.2. Application in the air conditioning and refrigeration industry: Compared to ordinary smooth tubes, threaded tubes offer 1.5–2.0 times the heat transfer surface area, greatly improving refrigerant flow patterns and enhancing boiling and condensation heat transfer inside the tubes. The refrigerant is propelled in a spiral motion by the internal threads, reducing pressure loss by over 50%. Manufacturing processes such as tube expansion and welding are the same as for ordinary tubes. This enables the miniaturization and lightweighting of air conditioners, saving approximately one-third of the tube weight compared to smooth tubes. Operation is energy-efficient, reducing costs.3. Application in heat exchange equipment: Steel or stainless steel tubes are formed in one pass through machine rolling. Scale on the surface of threaded tubes forms in a spiral pattern. Temperature changes during equipment operation cause the tubes to expand and contract, enabling the scale to self-detach. In contrast, scale on smooth tubes forms a cylindrical layer with no self-detaching capability. Threaded tubes are now widely used in power plant condensers and boiler auxiliary heat exchange systems, making them an ideal replacement for smooth tubes and copper tubes.Forming Process:After cold-rolling steel tubes, the tube dimensions shrink by 0.1% to 0.5%. Factors affecting the shrinkage length include: 1. Thread depth (e); 2. Pitch (s); 3. Thread radius (r). These parameters can be adjusted as needed.Processing diameter: ∮6mm–89mm; processing thickness: 0.5mm–5mm; adjustable spiral direction, adjustable pitch, adjustable thread depth. more>

Category:Hardware & Tools/Cutting Power Tools/Drill Bits

Product Description:Xinxiang Songjin Machinery Co., Ltd. specializes in the production of threaded tube machines for boiler plants, chemical plants, container plants, and heat exchange plants.Benefits of using threaded tubes in heat exchange equipment:(1) Simultaneous enhancement of heat transfer inside and outside the tube;(2) Fast processing speed, excellent results, and low cost;(3) Wide applicability: enhances heat transfer for evaporation, condensation, gaseous flow heat transfer, and liquid flow heat transfer both inside and outside the tube;(4) Self-adjusting capability with thermal expansion and contraction;(5) Scale is less likely to form.I. Product Introduction:Since Luwsun et al. from the United States published the first academic report on threaded tubes in 1966, threaded tubes have attracted significant attention as high-efficiency heat exchange components. They are now increasingly widely used in China. Threaded tubes are spiral heat-conducting tubes with internal protrusions and external indentations. The equipment uses cold rolling to process ordinary smooth tubes into threaded tubes. They are suitable for heat exchange tubes in equipment such as boilers, condensers, low-pressure heaters, oil coolers, and air coolers.II. Advantages:1. Application in boilers: After optimization for heat exchange and flow resistance, the heat transfer capacity of one threaded tube is equivalent to 1.7-1.8 ordinary steel tubes of the same size. This not only significantly reduces the number of steel tubes required but also allows for a smaller boiler shell diameter. As a result, steel consumption for pressure components is noticeably reduced, saving materials and lowering costs.2. Application in the air conditioning and refrigeration industry: Compared to ordinary smooth tubes, threaded tubes provide 1.5-2.0 times the heat transfer surface area, greatly improving the flow pattern of refrigerants and enhancing the boiling and condensation heat transfer effects inside the tube. The refrigerant is propelled in a spiral manner through the internal threads, reducing pressure loss by over 50%. Manufacturing processes such as tube expansion and welding are the same as for ordinary tubes. This enables air conditioners to be smaller and lighter, saving approximately one-third of the tube weight compared to smooth tubes. It also reduces electricity consumption during operation and lowers costs.3. Application in heat exchange equipment: Steel or stainless steel tubes are formed in one pass through machine rolling. Scale on the surface of threaded tubes forms in a spiral pattern. Temperature changes during equipment operation cause the tubes to expand and contract, enabling the scale layer to self-detach. In contrast, scale on smooth tubes forms a cylindrical layer with no self-detaching capability. Threaded tubes are now widely used in power plant condensers and boiler auxiliary heat exchange systems, making them an ideal replacement for smooth tubes and copper tubes.Benefits of using threaded tubes in heat exchange equipment:(1) Simultaneous enhancement of heat transfer inside and outside the tube;(2) Fast processing speed, excellent results, and low cost;(3) Wide applicability: enhances heat transfer for evaporation, condensation, gaseous flow heat transfer, and liquid flow heat transfer both inside and outside the tube;(4) Self-adjusting capability with thermal expansion and contraction;(5) Scale is less likely to form.Forming Process:After cold rolling, steel tubes experience a dimensional shrinkage of 0.1% to 0.5%. Factors affecting the shrinkage length include: 1. Thread depth (e); 2. Pitch (s); 3. Thread radius (r); these can be adjusted as needed.Processing diameter: ∮6mm-89mm, processing thickness: 0.5mm-5mm, adjustable spiral direction, adjustable pitch, adjustable thread depth. more>

Category:Hardware & Tools/Cutting Power Tools/Drill Bits

Product Description:Xinxiang Songjin Machinery Co., Ltd. holds a national invention for the spiral flat tube forming machine. The tube forming process ensures that the wall thickness remains unchanged and does not exceed the material's yield point, maintaining the mechanical integrity of the tube. Both ends of the tube remain circular, facilitating connection with the tube sheet. The range of tube materials is extensive, including carbon steel, stainless steel, Cr-Mo alloys, duplex and super duplex alloys, as well as titanium, zirconium, and tantalum, with tube diameters ranging from φ12 to φ40.The heat transfer rate of spiral flat tubes is significantly better than that of ordinary smooth tubes, with lower pressure drop and reduced susceptibility to fouling and blockage.A simulation study was conducted with fluids having a Reynolds number less than 1000 to compare the differences between spiral flat tubes and spiral elliptical flat tubes, while analyzing the field synergy angle of the two tube cross-sections and comparing them with straight flat tubes and straight elliptical flat tubes. The results indicate that the Nusselt number on the wall of both spiral tubes increases with the Reynolds number, with the rate of increase gradually slowing; the comprehensive performance evaluation factor of both spiral tubes increases with the Reynolds number, and that of the spiral flat tube is higher than that of the spiral elliptical flat tube, making it the preferred choice under these conditions. For self-supporting spiral tubes, at the same Reynolds number, the pressure loss of the spiral elliptical flat tube is lower than that of the spiral flat tube, but its heat transfer performance is inferior to that of the spiral flat tube.The spiral flat tube (Twisted tube) was proposed by Sweden's Alards company and improved by the American Koch Heat Transfer Company, LP, as an enhanced heat transfer tube.The structural feature of the spiral flat tube is that any cross-section of the heat exchange section is elliptical. When assembled into a heat exchanger, it can be a mixed tube bundle (i.e., a combination of spiral flat tubes and smooth tubes) or a pure spiral flat tube bundle.Its manufacturing process involves two forming steps: "flattening" and "twisting." The tube cross-section resembles an ellipse, with the aspect ratio of the ellipse designed based on the flow velocities of the tube side and shell side. When the tube side flow rate is low, the aspect ratio can be increased to reduce the flow area and increase the velocity. The unique structure of the spiral flat tube allows both the tube side and shell side fluids to undergo spiral motion simultaneously, enhancing turbulence. The overall heat transfer coefficient of a spiral flat tube heat exchanger is 40% higher than that of a conventional heat exchanger, while the pressure drop remains almost the same.In recent years, spiral flat tube heat exchangers have been further refined and developed. They are more reliable and efficient than other types of heat exchangers and can be used in almost any system where shell-and-tube heat exchangers are specified. Since 1984, thousands of spiral flat tube heat exchangers have been manufactured and sold worldwide, applicable to gas-gas, liquid-liquid, and liquid-gas heat exchange processes across various industries, including chemical, petroleum, food, papermaking, power, metallurgy, mining, and urban heating.Spiral flat tubes can simultaneously improve the heat transfer coefficients on both the inner and outer sides of the heat exchange tube, thereby significantly enhancing the overall heat transfer coefficient and total heat exchange efficiency. more>

Category:Hardware & Tools/Pipe Fittings/Tee Fittings

Product Description:JWB Ball Screw Lifts are suitable for high-speed, high-frequency, and high-performance applications, primarily composed of precision ball screw pairs and high-precision worm gear mechanisms.High Efficiency: Utilizes rolling friction to improve overall efficiency; only a small driving force is required to generate significant thrust.High Speed: Compared to ordinary trapezoidal screws, operating speed is greatly enhanced, allowing for easy adjustment and operation.Long Service Life: Equipped with high-quality ball screw pairs, extending working life by more than three times compared to ordinary trapezoidal screws. more>

Category:Hardware & Tools/Pipe Fittings/Tee Fittings

Product Description:The screw jack achieves functions such as lifting, lowering, pushing, and flipping through worm gear transmission. It is a fundamental lifting component widely used in various industries including machinery, metallurgy, water conservancy, chemicals, healthcare, culture, and sanitation. It features a compact structure, small size, lightweight, easy installation, flexible use, high reliability, excellent stability, and long service life. It can be directly driven by an electric motor or other power sources, and can also be operated manually. This series of worm gear screw jacks are self-locking, with a load capacity ranging from 2.5t to 120t, an input speed of 1500r/min, and a lifting speed of 2.7m/min. They come in different structural types and assembly methods, with an operating environment temperature between -20°C and 100°C. The lifting height is manufactured according to user requirements.Features of the screw jack:1. Smooth transmission, no noise;2. Low impact vibration;3. Suitable for low-speed, high, and low-frequency applications;4. Mainly used for small to medium loads;5. Load holding: The trapezoidal screw has an automatic locking function, allowing it to hold the load even without a braking device;6. Safety setting: Equipped with a limit switch to prevent exceeding its stroke and damaging the screw and nut.<img src="https://img-i-album.toocle.com/view/2024/05/29/9a/6656bec27819a.jpg" style="max-width:100%;"/> more>

Category:Hardware & Tools/General Hardware Parts/Casters & Swivel Wheels

Product Description: Suzhou Shunlu Traffic Facilities Engineering Co., Ltd. Rubber Wheel Stops Specialized Parking Lot Rubber Anti-Collision Wheel Stops to Prevent Vehicle CollisionsProduct Introduction 1. One set includes two pieces, used in combinationProduct Advantages:1. The size and specifications are suitable for wheels of various types and sizes of vehicles. To achieve effective results, this product differs from other products on the market that lack sufficient height and strength. It effectively supports the wheels without causing the vehicle chassis to collide with the product. Even extra-large trucks can use it.2. Made from industrial rubber, it is wear-resistant, pressure-resistant, shock-absorbing, moderately firm yet soft, and environmentally friendly. It will not damage vehicles or cause excessive vibration during use.3. The surface features reflective film treatment for enhanced performance. Clear positioning greatly assists in vehicle parking guidance, collision prevention, and pedestrian safety.4. Easy to install, with options for bolts, embedded rebar, or even cement pouring. Multiple installation methods are available for quick and efficient implementation. Installation Location: Fixed at the rear of the parking space, one meter away from the front. Installation Method: During installation, use expansion bolts to secure each parking space. Additionally, use a chalk line and secure with spikes or bolts to ensure all wheel stops are aligned in a straight line. If the parking space is on grass, a foundation must be prepared first to secure the wheel stop.<img src="https://img-i-album.toocle.com/view/2024/12/24/b7/676a63869d4b7.jpg" style="max-width:100%;" width="373" height="373"/> more>