Mechanical Hardware

High-temperature sealing plays a vital role in a wide range of industrial applications where equipment operates under extreme heat. From aerospace engines and automotive exhaust systems to chemical reactors and power plants, effective sealing solutions are essential to ensure safety, maintain efficiency, and prevent leaks. Designing a reliable seal for high-temperature environments requires careful material selection, precision engineering, and a deep understanding of thermal dynamics. Challenges in High-Temperature Sealing One of the main challenges in high-temperature applications is material degradation. Many common elastomers lose elasticity, harden, or break down chemically when exposed to elevated temperatures. This can lead to leaks, system failures, and even safety risks. Additionally, thermal expansion, pressure fluctuations, and chemical exposure further complicate the sealing process. Another issue is compression set—a permanent deformation of the sealing material after prolonged exposure to heat and pressure. This can cause the seal to lose contact with mating surfaces, reducing its effectiveness. Material Selection for High-Temperature Seals To withstand high temperatures, materials must retain their mechanical properties while resisting thermal and chemical degradation. Some of the most widely used materials include: Fluorocarbon Rubber (FKM): Excellent heat resistance up to 250°C, as well as strong resistance to oils, fuels, and chemicals. Commonly used in automotive and industrial sealing. Silicone Rubber (VMQ): Known for its flexibility and stability at high temperatures (up to 225°C), making it suitable for static seals and applications requiring low compression force. Perfluoroelastomers (FFKM): Offering top-tier resistance to extreme heat (over 300°C) and aggressive chemicals. These are often used in semiconductor manufacturing and aerospace. Graphite and Metal Seals: For ultra-high temperatures (above 400°C), metallic or graphite-based seals are preferred, as they offer exceptional thermal stability and pressure resistance. Design and Application Considerations A high-temperature seal must not only resist heat but also accommodate thermal expansion, pressure variation, and dynamic motion if present. For dynamic applications, like rotating shafts, spring-energized seals or metal-cased lip seals are often used. In static applications, gaskets or O-rings with heat- resistant materials and proper gland design are critical. Additionally, installation surfaces must be properly finished and maintained to avoid damaging the seal. Regular inspections and replacement cycles should be part of maintenance routines, especially in systems exposed to continuous or cyclical high heat. Industries and Typical Uses High-temperature seals are widely used in: Aerospace: Jet engines, fuel systems, and environmental control systems. Automotive: Exhaust systems, turbochargers, and engine compartments. Chemical Processing: Reactors and high-temperature pipelines exposed to corrosive substances. Power Generation: Steam turbines and boilers. Oil & Gas: Drilling equipment and high-temperature pumps. High-temperature sealing is a specialized field that requires the integration of advanced materials, smart design, and reliable manufacturing practices. By selecting the right sealing material and configuration for the application, manufacturers can prevent system failures, increase equipment life, and improve operational safety. In critical industries where performance under heat is non- negotiable, investing in high-quality sealing solutions is not just advisable— it’s essential.

Minimum Order: 500

LHB no leakage chemical process pump is developed and improved by our company on the base of chemical centrifugal pumps. Main features: mechanical seal with negative pressure device, in the pressure continues to increase and flow gradually reduce the case of long-term transfer of liquid, mechanical seal does not bear working pressure, ensure that the mechanical seal never leak. The pump is the ideal equipment for the construction of civilized factory. LHB No leakage chemical pump application: Alkali industry: soda ash and ammonia- hydrazine production of ammonia brine mother liquor, production of normal temperature caustic soda, chlorine products and chlorate, hypochlorite. Iron and steel industry: electroplating, pickling, waste acid treatment. Acid industry: nitric acid, sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid, etc. Nonferrous metallurgy: electrolytic copper and nickel electrolyte, production of cobalt acid fog liquid, production of zinc mineral slurry, production of vanadium vanadate ammonia, the production of gold acid and thiourea liquid transport. Paper industry: transfer of pulping liquor and bleaching liquor. Fertilizer industry: production of urea and ammonia nitrate. Petrochemical industry: petroleum refining acetaldehyde, alkyl benzene manufacturing. LHB chemical process pump performance parameters

Minimum Order: 1 bags

ZJQ Submersible slurry pump with agitator ZJQ Series submersible slurry pump is a kind of hydraulic mechanism which motor connects directly with pump. Pump body is the advanced structure of below suction type with stirrer and made from high-chrome alloy material and convenient to remove and install. So the pump is not clogging, corrosion-resistance, wear-resistance etc. The pumps are centrifugal, vertical slurry pumps submerged in sump during operation. They are designed for delivering highly abrasive, large particles and high density slurries. The sump pumps are suited for handling abrasive or corrosive, dense slurry with large particle size. Application: 2 - It is widely used to transport various corrosive slurry in metallurgy, mine, coal mine, construct, petrochemical industry, environment protect and drege of river channel The vertical slurry pumps are designed for delivering abrasive, large particle and high-density slurries and applied over the fields such as metallurgy, mining, coal, power, building materials, and environmental protection 3. (1). Power sources: Three-phase AC 380V 50HZ. (2). The medium temperature should not exceed 40℃, medium don't contain flammable and explosive gas . (3). Solid granule max. thickness in medium: grey sediment for 45%, mineral sediment for 60%. (4). Motor and pump max. dive depth should not exceed 20M, min. dive depth should not exceed 1M. (5). The best motor and pump is vertical, operate method is continuous operation. 4 - Capability parameter area: Capacity: 30~1450m3/h Head: 15~95m, Max. dia. of granule should not exceed 92MM

Minimum Order: 1 bags

NB Series high efficiency and energy saving sand suction pump is single stage and single suction horizontal centrifugal pump, which is widely used to pump the mud with sand grains at the bottom of rivers and lakes, sludge and impurities in pits and ponds, etc. It is also used for supporting operation of water well drilling rig. Wear resistant cast iron, long service life; Simple structure, reasonable design, convenient maintenance and balanced operation. High efficiency and energy saving sand pump is a new product successfully developed according to the characteristics of vertical mud pump in our factory. Features: good performance, high efficiency, long life, simple structure, easy maintenance, easy to use. It can pump the mud with high sand content and anti-blocking. It is widely used to absorb the yellow sand at the bottom of rivers, lakes and silt in ponds. Also it is as the ideal energy saving sand pump together with the water well drilling rig and the foundation . Flow rate: 40 to 400m3/h Head: 10 to 28m Caliber: 65 to 100mm

Minimum Order: 1 bags

IJ Chemical resistant centrifugal alkali pump A: Characteristics: Reliable and Steady running, continuous working for 24 hours, better design of cantilever, small vibration, low noise. Seal type: mechanical seal, dynamic seal, gland packing seal etc. (No leakage and long life). Summary: IJ chemical resistant centrifugal alkali pump is improved on the base of IH model single stage single suction chemical industry pump according to the standard ISO2858-1975 - The IJ chemical resistant centrifugal alkali pump is used to transfer the corrosive liquid with solid content less than 5% and suspension grain less than 3mm. Pump discharge pressure is up to 1.6MPA, Working temperature: -20 to 180 Degree Celsius. B. Application fields: Alkali industry: Soda and ammonia brine mother liquid from ammonia-hydrazine production, caustic soda with normal temperature from Chlorine-alkali production, chlorine products and chlorate, hypochlorite. Nonferrous metallurgy: electrolyte liquid from Electrolytic copper and nickel, acid mist liquid from production of cobalt, slurry from production of zinc ore, vanadate ammonia from production of vanadium, acid and sulfuric acid from production of gold etc. Iron and steel industry: Electroplating, pickling, waste acid treatment Acid industry: Nitric acid, sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid, etc. Petrochemical refining acetaldehyde, alkyl manufacturing. Synthetic fiber and plastics industry: Dilan, PVC production, textile, printing and dyeing industry. Papermaking industry: Transport of pulp cooking and bleaching fluids. Fertilizer industry: Urea, nitric acid production. Pharmaceutical industry: Pharmaceutical and pesticide production. Environmental protection: Transportation of acid mist solution. C. Pump materials: SS304, SS304L, SS316, SS316L, Hastelloy alloy B and other alloy steel etc 2Cr13, 0Cr18Ni9, 1Cr18Ni9, 0Cr18Ni9Ti, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 40Cr, 1Cr18Ni12Mo2Ti, Ti(Titanium, Monel, 00Cr17NI12Mo2Ti, HastelloyB alloy, 0Cr25Ni20, F5 series alloy, 20alloy steel, 0Cr25Ni6Mo3Cu2Mn2Si D. Performance range for IJ Series chemical resistant centrifugal alkali pump： Flow rate(Q)：2m3/h to 1200 m3/h, Head(H)：3m to 135m, Speed(N)： 2900RPM or 1450RPM, Motor power(P)：0.55KW to 200kw, Pump inlet and outlet: 32mm to 350mm, Max. working pressure: 1.6 Mpa

Minimum Order: 1 bags

Screw pump is a single-screw transfer pump. Its main working parts include the screw of eccentric helicoid(called rotor) and the screw bush with a double-line helicoid on its inner surface(called stator). Its working principle goes like this: when the electric motor drives the pump shaft t rotate, the screw rotates around its own axes on one hand and rolls along the inner surface of the bush on the other, thus forming a seal cavity in the pump. When the screw rotates a cycle, the liquids in the seal cavity will advance a screw pitch forward. With the continuous drive of the screw, the liquids will press from a seal cavity to another cavity in a spiral manner until it is pressed out of the pump body finally. Screw pump is a new type of machinery for the liquid transfer. It boasts such advantages as simple structure, safe and reliable operation, easy maintenance, continuous and uniform liquid discharge and stable pressure. The metal parts contacting materials of our underflow pump all adopt top-grade stainless acid-proof steel and the shaft material is 2Cr13 - The bush adopts nontoxic rubber with no peculiar smell. Its working temperature can reach up to 100 degree celsius. It can be used for the transfer of corrosive media like foodstuff slurry, solution or suspension containing solid grains or rubber blocks with a viscosity of 10000Pa.S. It is widely applied in such industrial sectors as food, metallurgy, construction, pharmacy and chemical industry etc.

Minimum Order: 1 bags

G Single Screw Pump/ 500rpm~960rpm high viscosity slurry pump G positive displacement pump can transmit liquid with 80% viscosity, and medium with solid suspension particle, etc . High viscosity medium can be pumped after heating. Application: It can transfer all kinds of fluid medium, can also transfer 0 - 200, 000 centipoise high viscous medium, containing hard suspended particles or solid particles, or fiber. (1)Food industry: Transfer liquor or wine, waste liquid or additive liquid (2)Textile mill: Transfer mixed fiber liquid, dyestuff, printing ink, mixed nylon powder liquid (3)Paper-making: Transfer black liquor (4)Petro-industry: Handing oil, grease (5)Chemical: Transfer suspended liquid, emulsion liquid, soda liquid and salt liquid

Minimum Order: 1 bags

As modern machinery and equipment become more efficient and sophisticated, the importance of sealing technology becomes increasingly prominent. As an enterprise focusing on the research and development and manufacturing of sealing products, NQKSF Oil Seals has won wide recognition in the domestic and foreign markets with its professional strength and stable quality. This article will analyze the product characteristics and core advantages of NQKSF Oil Seals to help users gain a deeper understanding of its competitiveness in the field of sealing. 1. Product Features Diverse structures and strong adaptability: NQKSF oil seal products cover a variety of structural forms such as TC, TG, TCN, V-rings, skeleton oil seals, silicone rings, etc., which can meet the sealing needs under different working conditions, including rotation, reciprocating, static and other application scenarios. Excellent material and stable performance: According to different use environments, a variety of high-performance elastic materials such as nitrile rubber (NBR), fluororubber (FKM), silicone (VMQ), hydrogenated nitrile (HNBR) are selected, which have good high temperature resistance, wear resistance, and corrosion resistance, ensuring long-term use in complex environments. Precision process and stable size: high-precision molds and advanced vulcanization technology are used to strictly control product size tolerances, stable sealing effect, and effectively reduce the risk of leakage during equipment operation. 2. Core advantages Strong R&D capabilities: NQKSF has an independent technical R&D team that can quickly develop customized seals according to customer drawings or samples to meet various non-standard needs. Stable quality control system: From the entry of raw materials to the delivery of finished products, full-process quality inspection is implemented to ensure that each batch of products has consistent performance and reliable quality. Quick response and global service: The company has established a stable customer base in many countries and regions around the world, supporting customization, fast delivery and technical support services, which is particularly suitable for long-term cooperation with medium and large equipment manufacturers. Factory direct supply, superior cost performance: Relying on its own factory, NQKSF oil seals can effectively control costs, and at the same time provide competitive prices while ensuring quality, helping customers save procurement costs. 3. Wide range of applications NQKSF oil seals are widely used in industries such as automobiles, engineering machinery, agricultural equipment, petrochemicals, and power systems, and are adapted to harsh environments such as high temperature, high pressure, and high speed. Its high reliability makes it a long-term cooperative brand for many equipment manufacturers and repairers. Choosing a reliable seal supplier is not only a guarantee of product performance, but also a control of the company's long-term operating costs. NQKSF Oil Seals is constantly providing stable and lasting sealing solutions to global customers with its innovative structure, optimized materials, rigorous processes and efficient services, and is a trustworthy partner.

Minimum Order: 500

DBY electric power double diaphragm pump electric diaphragm pump is driven by an electric motor through a reducer, and the pump is widely used to transport various corrosive liquids, liquids with particles, high viscosity, volatile, flammable, and highly toxic liquids. Parameters: Flow rate: 0-20m3/h; Lift: 30m; Power: 0.37-4kw; Speed: 1450r/min; Caliber: 10-100mm; Temperature: -15-+150 ℃; Self suction height: 5-7m Diaphragm pump material: cast iron, aluminum alloy, stainless steel, PTFE lining F46, rubber lining. Diaphragm material: acrylonitrile butadiene rubber, Neoprene, fluororubber, polytetrafluoroethylene, polytetrafluoroethylene F46. Sealing ball material: nitrile rubber, Neoprene, polytetrafluoroethylene, stainless steel, ceramic. Material of sealing ball seat: NBR, Neoprene, fluororubber, polytetrafluoroethylene Motors can be divided into ordinary motors, explosion-proof motors, reduction motors, and electromagnetic speed regulating motors

Minimum Order: 1 bags

Air powered diaphragm pump The air operated double diaphragm pump is the new conveying/transportation machinery /equipment using compressed air as the power source. Air distribution valves canceled traditional O type ring and cylindrical valve structure, using three-way operated, eliminating the valve dead center and pump stop phenomenon. Accurate and reliable directional signal avoid stop, and faster reversing leads to larger flow rate, which makes pulse smaller, more stable flow. It can pump various corrosive, volatile, flammable, poisonous liquids, even fluids with particles and high viscosity. Pump inlet /outlet diameter: 06mm (1/4inch), 10mm(3/8inch), 15mm(1/2inch), 20mm (3/4inch), 25mm(1inch), 40mm(1.5inch), 50mm (2inch), 80mm(3inch), 100mm(4inch) Pump body material: Acetal, PP, Aluminum alloy, Stainless steel (SS304, SS316), PVDF, Ductile iron Diaphragm material: Hytrel, Santoprene, PTFE, Buna N, Viton, Geolast Valve ball, valve seat material Acetal, PP, Aluminum alloy, SS304, SS316, Hytrel, PVDF, PTFE, Buna N, Vition, Geolast Main application: Chemical, petrochemical, paint, ceramics, metallurgy, environmental protection and medicine etc.

Minimum Order: 1 bags

QBK Air operated double membrane pump QBK Air operated double diaphragm pump not only can exhaust the flow liquid but also can convey some uneasy flowed medium with the merits of self priming pump, diving pump, shield pump, slurry pump and impurity pump etc. 1. It is unnecessary to pour the drawing water. The suction lift reaches 5m height. The delivery lift reaches 70m length and export pressure≥6kgf/cm2. 2. Wide flow and good performance. The diameter allowed to pass the max grain reaches 10mm. The damage is very less to the pump while exhausting the slurry and impurity. 3. The delivery lift and flow can pass the pneumatic valve open to realize the stepless adjustment.(the pneumatic pressure adjustment is between 1-7kgf/cm2) 4. This pump has no rotary parts and no bearing seals. The diaphragm will completely separate the exhausted medium and pump running parts and working medium. The conveyed medium can not be leaked outside. Thus it will not cause the environmental pollution to ensure human body safety while exhausting the toxin and flammable or corrosive medium. 5. No electricity. It is safe and reliable while using in the flammable and explore places. 6. It can be soaked in medium. 7. It is convenient to use and reliable to work. Only open or close the gas valve body while starting or stopping. Even if no medium operation or pausing suddenly for long time because of accident matters, the pump will not be damaged caused by this. Once over-loading, the pump will automatically stop and possesses the self protection function. When the load recovers normally, it can also start automatically. 8. Simple structure and less wearing parts. This pump is simple in structure, installation and maintenance. The medium conveyed by the pump will not touch the matched pneumatic valve and coupling lever etc. Not like other kinds pumps, the performance will drop down gradually because of the damages of rotor, gear and vane etc. 9. It can transmit the adhesive liquid(the viscosity is below 10000 centipoise) 10. This pump need not the oil lubricant. Even if idling, it has no influence to the pump. Main usage: 1. The pump can suck the peanut, pickles, tomato slurry, red sausage, chocolate, hops and syrup etc. 2. The pump can suck the paint, pigment, glue and adhesive etc. 3. The pump can suck various glazed slurries of tile, porcelain, brick and chinaware etc. 4. The pump can suck various grinding materials, corrosive agent and the oil dirt etc 5. The pump can suck various toxin and flammable or volatility liquid etc. 6. The pump can suck various wedge water, cement slurry and mortar etc 7. The pump can suck various strong acid, alkali and corrosive liquid etc 8. The pump can be used as a front-step transmission device of the solid and liquid separation equipment.

Minimum Order: 1 bags

Are you in need of high-quality oil seals and rubber seals for your industrial or automotive applications? Look no further than DEDE Seal Technology Company! With our years of expertise and commitment to excellence, we are proud to offer a wide range of premium seals that are designed to meet the demanding needs of various industries. At DEDE Seal Technology Company, we understand the importance of reliable and durable seals in your machinery and equipment. That's why we have invested in state-of-the-art manufacturing processes and quality control measures to ensure that our seals meet the highest standards of performance and durability. Whether you need rotary shaft seals, hydraulic seals, or custom-designed seals, we have the expertise and capabilities to deliver the perfect solution for your specific requirements. What sets DEDE Seal Technology Company apart from other seal suppliers is our dedication to customer satisfaction. We work closely with our clients to understand their unique needs and provide personalized solutions that exceed their expectations. Our team of experienced engineers and technical experts is always ready to provide professional guidance and support throughout the entire purchasing process. When you choose DEDE Seal Technology Company as your seal supplier, you can expect not only top-notch products but also exceptional customer service and on-time delivery. We prioritize customer satisfaction and aim to build long- lasting relationships with our clients based on trust, reliability, and mutual success. So, why settle for subpar seals when you can have the best from DEDE Seal Technology Company? Contact us today to discuss your seal requirements and experience the difference that our superior products and services can make for your business. Choose DEDE Seal Technology Company for all your oil seals and rubber seals needs and take your operations to the next level of performance and efficiency!

Minimum Order: 100

YG Series pipeline oil pump with explosion proof motor YG series pipeline oil pump is designed and manufactured according to API610 and GB3215-82 standard. It can be used outdoor without pump house. 2.Inlet and outlet flange are on the same centric line and can be set directly into pipeline. Vertical structure let the pump small volume and convenient installation. 3.Mechanical seal with high quality has no leakage. 4.Pump is driven by explosion proof motor of explosion mark DIIBT4 to insure good explosion proof. YG Series pipeline oil pump is suitable to transport non corrosive and flammable and explosive liquids in petroleum and light weave and chemical industry and machine etc industries. Medium temperature＜120℃, Density(ρ)＜ 1000kg/m3

Minimum Order: 1 bags

PBG Series screened pipeline centrifugal pump PBG Series screened pipeline centrifugal pump is manufactured as international technology of the same pumps and motor screen in fluids transport. They are subjected to ISO2858 and JB/T6878.2-93 standard. The pumps have the reasonable structure and steady operation and little noise and no vibration etc. They are often used to substitute normal horizontal and vertical pipeline centrifugal pump. Capacity range is 6.3～1080m3/h and head range is 12.5～125m and motor power is 0.37～160kW and speed is 1450r/min and 2900r/min。 1、PBG series screened pipeline pump are used to transport clear water and other liquids which similar to clear water in physical and chemical characteristic. Liquid temperature is not more than 80℃. Such as industry and city water, boost and supply water for high-building, gardening, fire fighting and warm and cooling circulation etc. Especially for the conditions of no vibration and noise such as pump station underground and air-conditions etc. 2、PBGR series screened pipeline hot water pump is used to transport soft water without grain for hot water boost and circulation in power resource and metallurgy and chemical industry and weave and making paper and city heating circulation in restaurant etc. Liquid temperature is not more than 160℃ 3、PBGP Series screened pipeline corrosion resistance pump is used to transport the corrosive liquids without solid which is similar to water in petroleum and chemical industry and metallurgy and electricity and making paper and food and pharmacy etc.

Minimum Order: 1 bags