Tools & Hardware

When rotating equipment encounters complex operating conditions, such as high pressure, fluctuating pressure, and elevated oil temperatures, the sealing system's mission becomes more than just "preventing oil leaks." Seemingly minor issues—slight shaft misalignment, unclean oil, or sudden load changes—often push seals to their limits, particularly lip stability, which can easily lead to problems. We've found in numerous field projects that the TCN high-pressure seal series is particularly well-suited to these applications characterized by fluctuating pressures and rising temperatures. It withstands not only steady-state pressures but also sudden fluctuations and disturbances. TCN High-Pressure Seal Structure • Dual-layer lip construction: The primary lip is responsible for pressure resistance and oil conduction, while the secondary lip is responsible for dust protection. For example, when equipment operates in dusty and humid environments for extended periods, the secondary lip effectively prevents external contaminants from entering the system, slowing down media degradation and lip wear. Internal spring: A short-coil design is used. This design offers the advantage of maintaining consistent lip pressure, ensuring a stable fit even with slight shaft wear or deformation, and preventing oil jumps. The combination of the housing and rubber-coated outer diameter provides both rigid support and greater tolerance for seat bore machining accuracy and thermal expansion and contraction, ensuring greater peace of mind and stability during assembly. How do we choose materials? Experience tells you these details are invaluable. We recommend choosing a flexible material based on the specific application: Nitrile (NBR): Excellent oil resistance and reasonable price. Suitable for applications with temperatures below 125°C, especially for equipment using standard mineral or synthetic oils. Fluorocarbon (FKM): This material is essential for high temperatures or highly corrosive media, and it resists degradation even after long-term operation. The housing and spring: We typically choose carbon steel or stainless steel, prioritizing strength over corrosion resistance depending on the application. Parameters · Operating Pressure: The recommended range is generally below 0.3 MPa. Of course, in some low-speed, well-lubricated, and heat-dissipating applications, higher pressures can be used, but actual measurement is essential. · Surface Roughness: This is often overlooked. We recommend a Ra of 0.2–0.8 μm. A surface that is too rough will damage the lip, while a surface that is too smooth will prevent film formation. This subtle difference can make the difference in the lifespan of the oil seal. · Lubrication and Cooling: Whether pre-lubrication is performed before startup, whether a film is formed, and whether there are hot spots all directly impact seal life. What equipment are TCN high-pressure seals commonly used in? · Pumps: For example, clean water pumps, chemical pumps, and sewage pumps, these seals perform well on pressure-bearing shaft ends. · Hydraulic systems: For hydraulic motors, plunger pumps, and gear pumps, these systems experience pulsation and low-speed, high-torque conditions, where the TCN series performs reliably. · Reducers and powertrains: Gearboxes and drive shaft ends, especially those operating in environments with combined thermal expansion and backpressure. · Industrial equipment and robots: Spindle and joint units, which are particularly sensitive to leakage. · Construction and agricultural machinery: Excavators, harvesters, and loaders. These types of equipment typically operate in very dirty environments and require high sealing requirements. · Wind turbine and marine equipment: Wind turbine yaw systems, pitch control mechanisms, and propeller shaft seals require water and dust resistance and pressure resistance. · Automobiles and heavy-duty trucks: Used in transmissions, differentials, and power take-off shaft ends, emphasizing durability and leakage control. If you're working in extreme conditions, such as vacuum, ultra-high speed, or high-corrosion applications, we recommend considering customized solutions or specialized oil seal models rather than simply using generic parts. Our Services · Fast In-Stock Delivery: We have a wide inventory of standard models, ensuring reliable emergency response. · Customized Services: We support the entire process from design, material selection, and sample testing. · Over 30 Years of Industry Experience: We not only sell seals, but also understand system optimization. We can help you improve overall performance through aspects such as heat transfer, lubrication, and vibration control. Seals aren't just for fitting and forgetting; they determine your equipment's stability, operating costs, and maintenance intervals. So, rather than waiting for problems, it's better to choose the right one from the start. We've tested, used, and seen the TCN high-pressure seal series overcome complex challenges in medium- and high-pressure rotary applications on multiple projects. We'd also like to share this experience with you: Don't just look at the data sheet; understand the issues facing your equipment before choosing the right solution. This is the beginning of understanding seal usage.

Minimum Order: 500

The LCB chlorine globe valve for steam/chlorine/ammonia are suitable for use with chlorine gas, gaseous ammonia, and liquid ammonia, serving the purpose of isolating or connecting pipeline systems. Bellow seal valves are leak-proof, have a long lifespan, and require minimal maintenance. The chlorine globe valve from AFBV VALVE finds extensive application in industries dealing with steam, gaseous ammonia, liquid ammonia, cooling and refrigeration systems, chlorine gas, liquid chlorine, phosgene, and other toxic gas environments. LCB chlorine globe valve advantage Why bellows sealed globe valve is the best choices for chlorine pipe line 1. All bellow seal globe valves have double seals (bellows +padding), Chlorine globe valves bellows longer than normal bellow globe valve. 2. Disc use PTFE, soft seal is more suitable for gas, sealing performance is better. 3. The inside seals bellows are all made by Hastelloy, which is most corrosion resistant and have a longer service life. The body is use LCB, LCB materials can still works well at a very low temperatures. 4. Chlorine globe valve is easy to open and close. Technical Specification Face to face: DIN3202 Flange ends: EN1092-1 and ASME B16.5 Design standard: DIN and ASME Test& inspection: DIN3230 and ASME

The stainless steel bellow globe valve produced by AFBV Valve, due to its dual-sealing characteristics, achieves zero leakage in the fields of heat transfer oil, steam, chlorine, liquid ammonia, and other working conditions, making the bellow seal valve  widely applicable.   Why liquid ammonia pipeline choice stainless steel bellow seal globe valve？ 1. As Ammonia is highly corrosive, material should choice stainless steel. 2. As Ammonia is poisonous, Disc seals need soft, use PTFE as seals to increase the sealing performance. 3. The inside seals bellows are all made by stainless steel 321, which is more corrosion resistant and have a longer service life. 4. Bellow sealed globe valves are lighter than normal globe valve in open and off.

Crafted with precision, these ANSI gate valves feature a distinctive wheel- shaped handle and a metal-to-metal seat for reliable sealing. The closure element, known as a wedge or disc, effectively controls the flow of process fluids through the valve body. ANSI gate valves features • ANSI Standard Compliance: Adheres to stringent US standards such as API, ANSI, and ASME for industrial applications. • Durable Construction: Built with high-quality materials like stainless steel CF8M and carbon steel A216WCB/F6 for longevity and resistance to wear. • Customizable Options: Industrial gate valves are available in a range of materials and trims tailored to customer specifications. • Versatile Actuation: Standard handwheel operation with the flexibility to include gearbox, electric, or pneumatic actuation upon request. ANSI gate valves applications • Industrial Applications: Gate valve ansi 150 is ideal for process control in various industries. • Offshore and Petrochemical: Reliable performance in demanding environments. • Pressure Control: Designed for low-pressure applications with precision flow management. Company Service AFBV Valve Fittings is committed to providing exceptional service to our customers. We offer: • Customization: Tailoring our ansi standard gate valve to meet specific project requirements. • Quality Assurance: Ensuring each flanged gate valve meets the highest quality benchmarks. • Technical Support: Providing expert advice for the selection and application of our ansi gate valve. • After-Sales Service: Delivering ongoing support to maintain the performance and longevity of our products.

Stainless steel flange ball valve The stainless steel flange ball valve is a full-bore ball valve equipped with flange connections. The purpose of flanged ball valves is to permit or block the flow within a pipeline system and ensure pressure maintenance within the pipeline. Featuring a spherical valve disc, ss flange ball valve regulates the fluid flow by opening and closing. The design of these valves aims to maintain a tight and leak-free seal. The thread ball valves stand as crucial components in the installation of pipeline systems for transporting liquids, gases, slurries, and more. The ANSI flange end ball valve is a full-bore ball valve with flange connections specifically designed for flow control and shut-off purposes. Constructed from stainless steel materials, ANSI flange stainless steel ball valves are suitable for general water, oil, and gas applications. These stainless steel flanged ball valves incorporate a fire-safe design and are tested in accordance with API 598 standards. Features: The AFBV stainless steel flange ball valve is a type of ball valve whose closing member is a sphere that opens and closes by rotating around the centerline of the valve body. Purpose: ss flanged ball valve is mainly used in pipelines to cut, distribute and change the flow direction of media. Structure: Flanged connections allow easy connection to piping systems. Flow Regulation: Ball valves, especially those designed with a V-shaped opening, have good flow regulation capabilities, making them useful in applications where fluid flow needs to be adjusted.   Technical specification Full Port Locking/No Locking Blow-Out Proof Stem Spring Ball Seat Design Precision Casting Design Standard: ASME B16.34/DIN/JIS Testing Standard: API 598/SP-110/GB/DIN Light/Middle /Heavy type available

The Y type globe valve design reduces the flow resistance of the to a minimum. The bellow seal valves non-rotating stem results in lower friction of all moving parts and longer stem packing life.  Y type bellows seal globe valve advantage Why are Y type bellows seal globe valve less popular than normal bellow seal globe valve？ 1. They are all bellows seal globe valve bellow seal globe valves with double seals (bellows +padding), normal globe valve only have padding seal. But their body design is different, Y type bellow sealed globe valve body more better for flow control. It has no flow loss，but a little expensive than normal bellow seal globe valve. 2. Disc with scraping effect, so y type globe valve has a longer service life. 3. The inside seals bellows are all made by stainless steel 321, which is more corrosion resistant and have a longer service life. 4. Y type bellow seal globe valves are lighter than normal globe valve in open and off. Applications: steam system, hot oil system, hot and cold water system etc. Technical specification Face to face: DIN3202 Flange ends: DIN2543-2546 Design standard: DIN Test& inspection: DIN3230

YB electric vane oil pump 220V electric diesel oil pump, kerosene oil pump is vane pump and equipped with mechanical seal. The pump is built-in with 100 micron filter which is easy to clean and flood valve. The pump body is made of cast iron with corrosion resistant coating and driven by Cast aluminum motor (IP54/220V/50HZ/1Phase/AC). Metal impeller is with 5 pcs vanes. The 220v oil pump is mainly used for refueling and conveying of mining machinery, generator sets and other consumption equipment, fishing boats, pleasure boats and small refueling points, especially for the conveying of diesel oil and kerosene oil etc. YB oil pump has the advantages of good self-priming performance, high lift, small volume, easy to carry etc.

Minimum Order: 1 bags

In hydraulic equipment and industrial automation systems, the stability of the entire system depends on various factors. However, there is one component that requires low investment and is easy to replace—this is the UN-type rod seal we are going to explore today. What is a UN Seal? UN seal (also known as a U-cup or U-type seal) is a versatile sealing component that can be installed on either piston rods or pistons. It features a distinctive “U” shaped profile, with both the inner and outer sealing lips specifically designed to optimize sealing performance in rod and piston applications. Material Selection and Structural Advantages To meet diverse sealing demands across different working conditions, DEDE offers this series in two material options: Polyurethane (PU) and Fluororubber (FKM). PU Material: Often referred to as the “fifth engineering plastic,” polyurethane combines the elasticity of rubber with the durability of plastic. It offers excellent wear resistance, tear strength, and chemical stability. Even under high-frequency motion and low compression set conditions, it maintains reliable sealing performance. With an operating temperature range of -20°C to +120°C, PU seals are well-suited for variable outdoor and industrial environments. FKM Material: Known for its exceptional resistance to high temperatures and oils, FKM is ideal for harsh chemical environments and high-temperature, high- pressure conditions. It is particularly suitable for high-vacuum systems, oil- filled systems, or applications requiring stringent media compatibility—such as hydraulic pumps and turbine sealing systems. Key Features and Application Adaptability The UN-type rod seal series offers the following advantages: High compatibility with both dynamic and static sealing in medium to high- pressure hydraulic systems; Precision lip design ensures low friction and stable oil return; Automatically enhances sealing performance as pressure increases, preventing leakage; Can be used in conjunction with dust wipers to significantly extend system lifespan. Thanks to these advantages, UN-type rod seals have become vital components in ensuring long-term operational stability across a wide range of equipment, including industrial hydraulic cylinders, automotive hydraulic power steering systems, electromechanical arms, and agricultural machinery hydraulic systems. Application Industries Construction Machinery: Hydraulic cylinder sealing systems in excavators, bulldozers, etc.; Automation Equipment: Sealing control at actuator ends in robots and mechanical arms; Industrial Equipment: Hydraulic presses, punching machines, CNC machinery; Automotive Industry: Rod seals used in power steering and transmission systems; Energy Equipment: Hydraulic regulation systems in wind power installations. By continuously optimizing material selection and refining manufacturing processes, DEDE has ensured that the UN series offers outstanding durability and low maintenance costs. DEDE's Service and Technical Support With over 30 years of manufacturing experience, DEDE is a well-established sealing systems provider with its own production facilities and a global supply and service network spanning more than 80 countries. Our key service strengths include: Fast delivery of standard parts: Covering tens of thousands of specifications to quickly meet customer demands; Customized sealing solutions: End-to-end services from structural design and material formulation to on-site testing; Sealing performance optimization: An experienced engineering team helps customers reduce maintenance frequency and extend service life. Additionally, DEDE is recognized as a provincial-level "Specialized and Innovative" enterprise and a national high-tech enterprise, making it a benchmark brand in intelligent manufacturing and technological innovation within the sealing industry. Why Choose DEDE’s UN Seal Series? Though small in size, sealing components are critical to the stable operation of systems. In high-frequency motion, high-pressure circuits, and harsh chemical environments, DEDE’s UN seal series delivers outstanding performance and versatile applicability—offering solid protection for reliable equipment operation. We don’t just sell seals—we deliver dependable sealing solutions. If you’re facing complex sealing challenges, feel free to contact us for technical advice or customized solutions.

Minimum Order: 500

Seals play a crucial role in hydraulic systems. U-shaped seals made of polyurethane (PU) and fluororubber (FKM) perform particularly well in high- intensity environments, such as those found in construction machinery, motors, and industrial robots. Why choose polyurethane (PU) and fluororubber (FKM)? Polyurethane is known in the industry as the "fifth plastic" because it combines the properties of both plastic and rubber. Honestly, traditional rubber often quickly breaks down in acidic and alkaline environments or when exposed to organic solvents, while PU offers far greater resistance. Its elasticity and toughness prevent deformation and aging even after extended use, ensuring a stable seal. Fluororubber is highly chemically stable, offering resistance to high temperatures, oils, high vacuum, acids, alkalis, and a variety of chemicals. It also boasts relatively good media resistance among elastomers. NQKSF is U-shaped piston seal series, designed specifically for hydraulic systems, can withstand temperature fluctuations from -20°C to 250°C, making it suitable for a variety of complex environments. More importantly, as oil pressure increases, its sealing force automatically strengthens, significantly reducing leakage. Application Scenarios and Industry Demands Speaking of their applications, U-shaped piston seals are used across a wide range of industries. Industrial machinery, especially pumps and hydraulic cylinders, places stringent demands on seals. Seals in motors, gearboxes, and engines also require both high-pressure and wear resistance. Agricultural and construction machinery often operate in harsh environments, making U-shaped seals' corrosion resistance and compression resistance an excellent choice. Of course, industries like water treatment, wind power generation, and the chemical industry also place extremely high demands on seal stability and durability. NQKSF has accumulated extensive experience in the sealing field over many years, exporting its products to over 80 countries and earning widespread recognition. NQKSF is Service Advantages NQKSF is backed by a physical factory and over 30 years of manufacturing experience. We offer a comprehensive inventory of O-rings and oil seals, enabling us to quickly respond to urgent customer needs. NQKSF offers comprehensive, customized services, from material selection and structural design to testing, to address sealing challenges in diverse operating conditions. Our technical team helps customers optimize sealing performance, reducing equipment maintenance costs and extending service life. Long-term customers report that NQKSF is products are stable and reliable, with excellent after- sales service. U-type piston seals, particularly NQKSF is, are a wise choice for many industry customers seeking to improve equipment stability and operational efficiency. While small, these seals are crucial to the health of the entire system. Whether in high-pressure hydraulic systems or harsh industrial environments, U- type piston seals demonstrate their unique advantages. For more details, please contact us or leave us a message, and we'll promptly respond.

Minimum Order: 500

I still remember the first time I saw a hydraulic cylinder fail on a steel plant line. The rod looked clean. The parts looked fine. But the fabric- reinforced V-packing set had worn out. That got me thinking—this isn’t a weak seal, it’s just stressed beyond limits. Why Fabric Reinforced V-Packings? Here’s the deal: you have high-pressure, frequent reciprocating motion, sometimes dirty hydraulic oil. Standard V-ring or O-ring won’t cut it. That’s when fabric-reinforced V-packing sets, with canvas backing and rubber lip, makes sense. At DEDE, we offer exactly that. Most importantly, we’ve based our designs on real failure modes. You pick material (like canvas + NBR, or canvas + FKM), and adjust ring count based on pressure. Works up to 40 MPa reliably. Real Use Cases We’ve Seen · Mining rigs—harsh dirt and high load cycles. Our canvas stack cut replacement from once per month to quarterly. · Metaller hydraulic cylinders—vibration from presses. Complaints dropped after switch. · Oilfield pumps—pressure spikes. PEEK/PTFE reinforced stacks gave seal life from weeks to half a year. The Stack Structure Matters, let me break it down: Top is male adapter, then 3–7 V-rings (fabric-reinforced rubber), bottom is female adapter. When pressure mounts, the female adapter pushes down. Each ring expands outward. Sealing happens progressively. First ring takes most stress. Leaks reduce as it passes through next ring. If you need tighter seal, add another ring. Too much friction? Remove one. It’s field-adjustable. Perfect for maintenance teams. We offer multiple compounds: · Canvas + NBR — good for mineral hydraulic oil, standard systems. · Canvas + FKM — chemical resistant, ideal where oil contains additives. Choice depends on fluid, stroke speed, temperature, alignment. We help match it all through technical review. Why Use DEDE is Approach · Immediate shipping on stock of over 10,000 seal specs (V-packing, O-ring, oil seal). · Custom design service—from sketches to prototype, match your exact cylinder size. · Engineering knowledge—we evaluate your pressure, stroke, fluid, even rod surface finish. · Manufacturing expertise—we’re a recognized High-Tech Enterprise, Innovation Center, and specialize in sealing OEM. We ship to more than 80 countries. Our clients include OEMs in construction machinery, oil/gas, metallurgy, mining, rail traction, robotics. If your equipment suffers from leakage, short seal life, or frequent maintenance—especially under high pressure or cyclic load—try a fabric- reinforced stack instead of a molded ring. Reach out to the DEDE engineering team. Share your cylinder bore, rod size, oil type, and we’ll help configure a V-packing stack. Adjust ring count, material compound, compression—everything can be fine-tuned. We don’t just sell seals. We solve the problem that seal failure refuses to leave behind.

Minimum Order: 500

Our EVI DC Inverter Heat Pump adopts the latest generation of high efficiency scroll compressor with enhanced vapor injection (EVI) technology. The compressor greatly enhances heating performance in winter under ultra-low temperature without electric auxiliary heating and achieves high energy-saving efficiency. -25ºC Ambient Temperature Winter Heating / 45ºC Ambient Temperature Summer Heating. ENERGY EFFICIENCY RATING LABEL Space heating Series is specially developed with the most cutting-edge heat pump technology and modern design to meet stringent requirements for efficiency, stability and quietness. Not only does Space heating Series use R32 green gas, but also is rated with A+++ energy label. With top energy rating A+++, the unit is energy efficient and can greatly reduce energy bills for users. SMART APP REMOTE CONTROL Our Inverter EVI Heat Pumps are equipped with highly integrated control functions, which can be operated via a remote APP. With a Wi-Fi and 4G/5G connection, you can take full control of your heat pump on your smartphone via an app. The app can be found in the App stores.  The system is easy to manipulate, stable in performance, and is truly a smart operating system. R32 REFRIGERANT The R32 refrigerant is more environmentally friendly compared to other traditional refrigerants. Its ability to enable an inverter heat pump to recharge and recycle more effectively than some other refrigerants means that the unit can run at much higher efficiencies.

DESIGN FOR SMALL SIZE SWIMMING POOL Specially designed for above-ground pool heating, which is the perfect partner of your above-ground pool.  LOW NOISE A fully enclosed cabinet is specially designed for the compressor so that the running noise can be kept inside and the noise of the whole unit can maintain very low. EASY CONTROL Our swim spa heat pump has a simple control panel with an LED display.  It is easy to operate. PLUG & PLAY The swim spa heat pump is light and easy to install, and can be portable every where. Equiped with a plug & play power connection. It’s compact design and horizontal discharge, which is convenient during installation process.

Our commercial swimming pool heat pumps are engineered for demanding pool environments, from hotels and resorts to community centers and water parks. They feature robust compressors, inverter-driven variable-speed operation, and smart controls, ensuring precise temperature management and seamless integration with Building Management Systems (BMS). The use of eco-friendly R410A refrigerant further reduces greenhouse-gas impact while maintaining top- tier heating performance. COMMERCIAL OCCASION APPLICATION LC commercial swimming pool heat pumps are widely used in public places all over the world, such as hotels schools, aqua parks, gyms, etc. A full-inverter commercial pool heat pump delivers reliable, year-round water tempering by extracting ambient heat and transferring it into pool water with minimal energy input. Equipped with R410A refrigerant and advanced inverter technology, these systems achieve high Coefficients of Performance (COP) – 5.23~5.47 – meaning for every unit of electricity consumed, five to six units of heat are delivered, translating into substantial energy savings and lower operating costs for large-scale aquatic facilities.

The application of an improved compressor and inverter technology synergies is a crucial element for the unit to be a top performer which can raise the energy efficiency and provide homeowners with greater cost-savings. DC Inverter Pool Heat Pump Vertical PRODUCT DETAILS HIGH EFFICIENCY OF COP 18.5 R32 full inverter pool heat pump can reach a COP as high as 18.5 at Air 27°C/ Water 27°C/ Humid 80%. APP CONTROL With a Wi-Fi and 4G connection, you can take full control of your swimming pool heat pump on your smartphone via an app. The app can be found in the App Store . LOW NOISE RUNNING A fully enclosed cabinet is specially designed for the compressor so that the running noise can be kept inside and the noise of the whole unit can maintain very low.The average sound level is 29dB(A) at 1. meter. ENERGY-SACING & ENVIRONMENTAL-FRIENDLY R32 Gas-Low GWP Compared to the refrigerantswidely used today, such as R410A, R32 has a global warming potential that is two-third lower and it is remarkable for its low environmental imact, which speed up its popularity in the industry. Energy Saving Application LC applies the latest technology in heat pump  field to achieve the trile energy saving effect on unit. application and behavior.