Mechanical Hardware

WQD-S series all stainless steel precision cast sewage submersible pump adopts a unique single and double channel impeller structure, which greatly improves the passage capacity of sewage and can pass through fibers with a diameter 5 times that of the pump. Adopting fluororubber double end face mechanical seal and fluororubber radial O- ring seal, it effectively seals and protects liquids in harsh environments. Adopting precision cast pump casing, it is lightweight, corrosion-resistant, energy-saving, aesthetically pleasing, easy to maintain, and does not require the construction of a pump room. It can work underwater, reducing project costs Install overheat and current protectors inside the electric pump to prevent motor overload and overheating. Customized anti-corrosion cables, PTFE machine seals, and high-temperature liquid component configurations can be made according to specific customer requirements 220V, single-phase pump can be equipped with float switch Main application Suitable for buildings, hospitals, residential areas, municipal engineering, road traffic and construction, factory sewage, aquaculture, pharmaceuticals, beverages, seawater and saltwater, solid particles in general corrosive media, long fiber wastewater, sewage discharge

Minimum Order: 1 bags

TLRP stainless steel rotary pump relies on two synchronously counter rotating rotors to generate suction (vacuum degree) at the inlet during the rotation process, thereby sucking in the material to be conveyed. Two rotors separate the rotor chamber into several small spaces and operate in the order of ABCD; When operating to position A, only chamber I is filled with medium; When reaching position B, a portion of the medium is enclosed in chamber B; When reaching position C, a portion of the medium was also enclosed in room A; When reaching position D, chambers A and B are connected to chamber II, and the medium is transported to the discharge port. Selection of transmission driver/motor 1 - Motor with fixed ratio reducer: This transmission method is simple, with a constant rotor speed, which determines the non adjustability of the flow rate. 2 - Motor with mechanical friction type continuously variable transmission: This type of transmission is achieved through manual adjustment, characterized by safety and reliability, high torque, and infinitely adjustable flow rate. The disadvantage is non automatic adjustment, which is more complicated. The speed regulation is carried out during operation and cannot be adjusted while the machine is stopped. Its use and maintenance should refer to the manufacturer's user manual. 3 - Variable frequency motor with frequency converter: This method can achieve automatic adjustment of speed, that is, infinite adjustment of flow rate. Its advantages are high degree of automation and large low-speed torque. The disadvantage is that the price of the frequency converter is relatively high. Refer to the manufacturer's user manual for its use and maintenance. Feature: 1 - Maintain a certain gap between rotors and between rotors and pump bodies, with no friction coefficient and long service life. 2 - Easy to assemble and disassemble, convenient to maintain and clean, with few vulnerable parts. 3 - Effective energy saving, low failure rate, reliable sealing, and low noise. 4 - After using special materials, it can transport media containing solid particles such as sludge and sewage. 5 - The transportable medium has a viscosity of is no more than 2 million cp and a slurry with a solid content of 60 percent. 6 - After configuring the transformer, the flow rate can be adjusted freely and it can be used as a general metering pump. 7 - According to user connection requirements, flange type, screw type, and clamp type can be selected. 8 - Can transport mixed materials of air, liquid, and solid phases. 9 - The insulation cooling pump adopts a built-in structure with good thermal conductivity. 10 - The mobile pump can suction various barrel materials, with a suction vacuum degree of 0.08Mpa 11 - According to user requirements, a sanitary safety valve can be installed on the pump head.

Minimum Order: 1 bags

condensate pump is an industrial device used in thermal power plants to transport condensate and other similar liquids. It belongs to the horizontal centrifugal pump category, featuring single-stage, two-stage, and inducer wheel configurations. The flow components are made of cast steel or stainless steel, and the driving method is electric motor. N-type condensate pump has a flow rate range of 5-137 m³/h and a head range of 22- 170 m. Models such as 100N130 and 150N110 can achieve water drainage via cooling water. It features a soft packing seal and a cantilever bracket bearing structure, with operating temperatures categorized into two scenarios: 120°C (for condensate water) and 80°C (for steam condensate). This pump is suitable for steam turbine generator units ranging from 750 to 3000 kW. During installation, it is essential to ensure independent pipeline support and maintain an alignment error of ≤0.1 mm between the pump shaft and motor shaft. Some power plants employ variable frequency speed regulation technology to adjust flow rates, thereby reducing energy consumption and improving operational efficiency. Condensate Pump is Suitable for Medium: Fresh Water Medium Temperature: 0°C to 120°C Condensate Pump Application Range The 100N130 and 150N110 models can transport liquids at temperatures up to 120°C, while other pumps are limited to a maximum temperature of 80°C. flow range: 12—120 m³/h head range: 38–135 m Model Description: The meanings of 3N6X2 and 4N6A 3, 4—Inlet pipe diameter (in); N—Horizontal Cantilever Condensate Pump; 6—The single-stage head is divided by 10 and rounded to the nearest integer, resulting in a single-stage head of approximately 60 meters; 2——stage, indicating that the pump has two stages; A——The impeller has been cut (with a reduced outer diameter).

Minimum Order: 1 bags

Stainless steel corrosion resistant self-priming centrifugal pumps The impeller of pump can be semi-open structure with 3 blades or close impeller. Pump and motor connection can be direct connection (close coupling) or shaft coupling with bearing bracket. Pump body is made of stainless steel SS304 or SS316 etc. Fluorine rubber Mechanical seal with corrosion resistance. The pump has self- priming performance. Suction height: 4meters. The pump is Widely used in food, medicine, fine chemicals and other industries to transfer corrosive liquids with small soft particles or fiber or hygienic liquids. The pump with semi - open non - clogging impeller can be used to extract rice milk, drinks, etc. Explosion-proof self-priming pump can transport methanol, alcohol, urea, chemical solution and so on. Liquid temperature is not higher than 102 degree Celsius.

Minimum Order: 1 bags

SFB stainless steel corrosion-resistant centrifugal pump, Its passing-flow components and connecting frame are made of high-quality stainless-steel materials(SS304 or SS316), and the impeller adopts a semi open or closed structure. The connection between the pump and the motor can be close coupled or with shaft coupling. Pumps are suitable for conveying corrosive and hygienic liquids in industries such as food, beverage, medicine, cosmetics, wastewater treatment, chemical (or fine chemical), electroplating, etc. They are widely used to transport liquids with a temperature not exceeding 105 degrees Celsius, containing or not containing small soft particles or fibers, and with corrosive or hygienic requirements. Self priming type pump is available

Minimum Order: 1 bags

LDTN pump is a vertical multi-stage barrel structure, with the suction and discharge ports located on the discharge seat. Suction and discharge ports can be adjusted at multiple angles such as 180 degrees and 90 degrees angle, and the impeller is closed. Pump inlet diameter is 80-400mm, the flow rate is 7-702m3/h, the head is 35-232m, the power is 3-630KW, and the voltage is 380V/6000V LDTN type condensate pump is suitable for transporting condensate water in the condenser of thermal (nuclear) power plants, and can also be used in chemical processes with restricted installation surfaces such as NPSH to transport water with physical and chemical properties similar to water, with a water temperature not exceeding 180 degrees. 200LDTN-125*5 200: suction diameter 200mm L: vertical D: multistage T: barrel type N: Condensate pump 125: Discharge diameter 125mm 5: Pump stage

Minimum Order: 1 bags

CWZ Marine horizontal self-priming centrifugal pump CWZ type marine horizontal self-priming centrifugal pump, suitable for use as a cooling pump, sanitary pump, fire pump, bilge ballast pump, and various seawater pumps for freshwater and seawater on ships, with a conveying medium temperature of ≤ 80℃. Model meaning: 80CWZ-11 80 -Inlet and outlet diameter(80mm) CWZ-Marine Horizontal self-priming centrifugal pumps 11-Impeller specific speed divided by 10 compared with the integer value addition. Materials Pump body/pump cover(back cover): cast iron or bronze Impeller: bronze, Stainless steel shaft, mechanical seal type

Minimum Order: 1 bags

PVHB, CLHB Marine vertical centrifugal pump detachable structure PVHB/CLHB Ship centrifugal pump is suitable for ship ballast cabin bottom pump, cooling pump and fire pump, etc. It can be used to transport seawater, fresh water and other corrosive liquids with the temperature not higher than 120 degrees Celsius. Special requirements can reach 200 degrees Celsius. A bold improvement on the design is carried out for the structure of model PVHB, CLHB removable vertical centrifugal matched with each other. The external structure of it is formed with motor, joint shaft coupling and pump casing and driving unit is formed with motor shaft, claw elastic clutch bearings inside of the bearing seat, pump shaft and impeller. To maintain it needs only to remove the driving unit under the claw elastic clutch coupling, without need of removing motor, joint coupling and pump casing. The pump will not be affected with its performance and can be kept in a stable condition all the time in case of a long-way transportation and use under an awful environment. Pump material: bronze, stainless steel, cast iron Voltage: 380V/440V Frequency: 50HZ/60HZ

Minimum Order: 1 bags

YU-2 series corrosion-resistant and wear-resistant submersible pump features flow components made from high-performance ultra-high molecular weight polyethylene (UHMWPE) through integral molding. This material is recognized internationally as a novel engineering plastic for pumps, offering outstanding advantages: among all engineering plastics, it exhibits exceptional wear resistance, impact resistance, and creep resistance, along with good corrosion resistance. It is suitable for conveying acidic or alkaline clear liquids or slurries within the temperature range of -20 to 90degree Celsius. YU-2-J series corrosion-resistant and wear-resistant submerged pump features a stirring paddle /agitator installed at the lower part of the YU-2 series submerged pump. It can simultaneously transport liquids while stirring the sediment beneath the surface. This pump is suitable for cleaning and transporting slurry materials containing solid phases, as well as sediment from pools, tanks, and similar containers such as sewage tanks or settling tanks.

Minimum Order: 1 bags

In recent years, the demand for oil seals has grown steadily across automotive, construction, chemical, and household equipment sectors. Yet, the market is uneven. Some buyers have learned the hard way that choosing the wrong supplier or material can lead to premature leakage, costly downtime, and reputational damage. The question many distributors and wholesalers ask is simple: how can we ensure that the oil seals we purchase are truly qualified? Case Study: A Chemical Plant’s Costly Lesson A chemical plant once sourced a batch of low‑priced oil seals for its pumps. Within three months, several units began leaking. The downtime cost far outweighed the initial savings. Later analysis showed the seals were made of substandard rubber that lacked chemical resistance. The incident highlighted the importance of verifying both material and supplier credibility. Case Study: Automotive Aftermarket Practices In the automotive aftermarket, one service company shared its approach: they only work with brands that operate real manufacturing facilities and can provide material test reports. While the unit price is slightly higher, warranty claims and customer complaints have dropped significantly. Key Considerations for Buyers Application Fit Automotive engines and gearboxes often require FKM for heat and oil resistance. Water treatment or household appliances may rely on EPDM for steam and aging resistance. Chemical pumps need materials that withstand corrosive media. Material and Craftsmanship Qualified seals should match their specification and be backed by test data. Inspect the sealing lip: it should be smooth and free of burrs. Poor workmanship is a red flag. Installation and Maintenance Even a qualified seal can fail if the shaft surface is rough or if the seal is hammered into place. Proper lubrication and alignment are essential to extend service life. Ensuring that you purchase qualified oil seals is not just about price—it is about matching the right material to the application, verifying supplier credibility, and paying attention to installation. For distributors and wholesalers, these steps reduce after‑sales issues and strengthen customer trust.

Minimum Order: 1000

Oil seals are indispensable in modern machinery. They prevent leakage of lubricants and block contaminants from entering critical systems. Yet, their service life is not fixed; it is shaped by a combination of design, environment, and human handling. Operating Conditions Temperature: Excessive heat accelerates rubber hardening and loss of elasticity. A seal designed for 120°C may last years in moderate service but fail within months if exposed to 160°C. Speed and Pressure: High shaft speeds increase friction and heat generation. Similarly, pressure beyond the seal’s design limit can deform the lip and shorten life. Material Selection NBR (Nitrile): Cost-effective, suitable for oils and fuels at moderate temperatures. FKM (Fluoroelastomer): Withstands high heat and aggressive chemicals. Silicone and PTFE: Used in specialized environments such as food processing or dry-running conditions. Choosing the wrong material is one of the most common reasons for premature seal failure. Shaft and Housing Quality Surface Finish: A rough shaft surface can cut into the sealing lip, while a mirror-like finish may prevent oil retention. The ideal roughness is typically Ra 0.2–0.8 µm. Concentricity: Misalignment between shaft and housing creates uneven wear. Lubrication and Medium Lubricant Compatibility: Some oils contain additives that attack elastomers. Contaminants: Dust, water, or abrasive particles can quickly erode the sealing edge. Installation Practices Handling: Using sharp tools or forcing the seal into place can damage the lip. Orientation: Installing the seal backward is a surprisingly common error in field repairs. The service life of oil seals is not determined by a single factor but by the interplay of environment, material, and installation. For distributors, understanding these variables reduces after-sales issues and builds stronger customer trust.

Minimum Order: 1000

An O-ring repair kit is designed to provide maintenance teams with the necessary tools and materials to quickly replace or repair worn-out O-rings, reducing downtime and extending the life of the equipment. In this article, we will explore the importance of O-ring repair kits, their applications, the materials used, and how they contribute to maintaining the efficiency of industrial systems. What Is an O-Ring Repair Kit? An O-ring repair kit typically contains a variety of O-rings in different sizes, materials, and hardness grades, along with the necessary tools for removing and installing them. These kits are usually tailored to meet the needs of specific industries or applications, ensuring that users have the right components for the job. The key advantages of using an O-ring repair kit include: Convenience: The kit offers all the necessary components in one package, enabling technicians to perform repairs without waiting for specialized parts or service. Cost-Effectiveness: By replacing just the damaged O-ring instead of replacing entire components or systems, maintenance costs are reduced. Flexibility: O-ring repair kits often contain a wide range of sizes and materials, making them versatile for various applications. Applications of O-Ring Repair Kits O-rings are found in numerous industries where they function to prevent leaks and ensure the proper functioning of machinery. These seals are used in both static and dynamic sealing applications, and can be exposed to harsh conditions, including high temperatures, aggressive chemicals, and high- pressure environments. Consequently, O-ring repair kits are valuable in several key sectors: Hydraulic and Pneumatic Systems In hydraulic and pneumatic systems, O-rings are used to create seals that prevent leaks of pressurized fluids or gases. These seals are subject to high pressure, frequent motion, and temperature changes, making them prone to wear and damage. O-ring repair kits allow technicians to quickly replace faulty O-rings and restore system integrity, preventing costly downtime and reducing the risk of system failure. Automotive and Heavy Machinery O-rings are used in a wide variety of automotive and heavy machinery applications, such as engines, transmissions, pumps, and braking systems. The seals help prevent oil leaks, coolant leaks, and gas emissions. When an O-ring fails, it can cause significant issues, including loss of pressure, system malfunction, or even safety hazards. Having an O-ring repair kit on hand enables quick fixes and ensures that equipment remains in optimal working condition. General Industrial Applications O-rings are also used in general industrial equipment such as pumps, compressors, valves, and industrial machinery. These seals help maintain pressure and prevent fluid leakage, which is critical for maintaining system performance and safety. Repair kits for industrial applications are often designed with a wide range of O-ring sizes to suit various equipment, enabling quick repairs and minimizing downtime. Choosing the Right Materials for O-Ring Repair Kits The material of the O-ring is crucial for determining its compatibility with the environment and the specific application. The most common O-ring materials include: Nitrile Rubber (NBR): Best for use with oils, fuels, and water-based fluids. NBR offers good mechanical properties and resistance to wear. Fluorocarbon Rubber (FKM): Known for its excellent resistance to high temperatures, chemicals, and fuels. FKM is commonly used in automotive and aerospace industries. When choosing an O-ring repair kit, it's essential to select the correct material based on the application's operating conditions. For example, in a high-temperature or high-pressure environment, FKM might be the best choice. Installation Tips for O-Ring Repair Kits Proper installation of O-rings is critical to ensuring their effectiveness. When using an O-ring repair kit, here are some essential tips for installation: Inspect the Sealing Surface: Before installing a new O-ring, inspect the groove and sealing surfaces to ensure they are clean, smooth, and free from debris or sharp edges that could damage the O-ring. Use Lubrication: Applying lubrication to the O-ring during installation reduces friction and prevents damage. It also ensures a smoother fit and helps to extend the lifespan of the seal. Avoid Overstretching the O-Ring: Be careful not to overstretch the O-ring during installation. Overstretching can cause the O-ring to lose its elasticity and reduce its sealing ability. Ensure Correct Orientation: Make sure the O-ring is installed in the correct direction and seated properly in the groove to ensure uniform compression and a tight seal. Why O-Ring Repair Kits Are Valuable to B2B Clients For distributors and wholesalers, O-ring repair kits are an essential product offering. These kits provide significant value to clients by ensuring that industrial equipment can be quickly repaired and kept operational with minimal downtime. A well-stocked repair kit can help companies save on costly system replacements and keep their equipment running smoothly. O-ring repair kits are a vital resource for industries that rely on O-rings for sealing applications. They provide a quick, cost-effective solution for replacing damaged O-rings, minimizing downtime, and improving the overall efficiency of machinery. By understanding the various materials and choosing the appropriate repair kit, businesses can ensure that their systems continue to function optimally, preventing costly disruptions and maintaining the integrity of critical equipment.

Minimum Order: 1000

In the world of industrial sealing, X-ring seals, sometimes called quad- rings, have quietly become a preferred choice in many demanding applications. At first glance, they may look like a slightly flattened “X,” but that shape is precisely what gives them their unique sealing properties. Compared with traditional O-rings, X-ring seals offer improved stability in both static and dynamic conditions, particularly where repetitive or rotational motion is involved. The four-lobed design creates multiple contact surfaces that help maintain a consistent seal, even under fluctuating pressures or frequent movement. These surfaces also retain lubrication better than a standard O-ring, reducing wear and extending the seal’s effective life. Materials and Suitability X-ring seals come in a variety of materials, chosen according to the application: nitrile rubber (NBR) for general hydraulic or pneumatic systems; fluorocarbon (FKM/Viton®) for high-temperature or chemical- resistant applications. Each material behaves differently depending on temperature, fluid compatibility, and mechanical stress, so distributors often consult with customers to select the right type. In practice, having multiple materials in stock allows faster response to client needs without long lead times. Where X-Ring Seals Are Commonly Used In hydraulics, X-rings are frequently found in cylinders, valves, and actuators. Their structure reduces the risk of twisting or extrusion under repeated pressure cycles, which can be a problem with standard O-rings. Pneumatic systems also benefit, as the multiple lips reduce gas leakage and help maintain consistent pressure in actuators and control valves. Rotating machinery is another area where X-rings excel. They can be used on shafts, pumps, gearboxes, and motor housings to prevent lubricant loss and block contaminants. Unlike some standard oil seals, X-rings fit into smaller grooves and maintain sealing performance even under moderate eccentric loads or vibration. Many manufacturers are starting to include X-rings as a standard component in machinery to improve reliability without redesigning housings. Installation and Handling Even though X-rings are small components, installation still matters. The groove must be clean and free of burrs, and applying a light layer of compatible lubricant helps reduce friction during assembly. Oversized stretching or twisting during installation can damage the sealing lips and lead to premature failure. In many industrial settings, maintenance teams periodically check seals for wear, hardness, and deformation, ensuring the equipment continues to operate reliably. As automation and high-precision equipment continue to develop, the demand for reliable, low-friction seals grows. X-rings offer a practical solution, balancing durability, compatibility, and cost. Suppliers who can provide a variety of materials, accurate sizing, and responsive stock management are best positioned to serve the industrial market. Seals may be small components, but their role in system reliability is significant. Selecting the right X-ring, understanding the operating environment, and proper installation are all critical. In the end, a well- chosen X-ring can quietly ensure that complex machinery continues to function efficiently and safely.

Minimum Order: 1000

In the evolving world of industrial sealing, X-ring seals—also known as Quad Rings—have become a reliable choice for engineers seeking enhanced sealing performance. These seals, shaped with a distinctive four-lobed cross-section, are widely used in applications where traditional O-rings may face limitations such as twisting or leakage under high dynamic pressure. Their design ensures more stable contact surfaces, reducing friction, improving lubrication retention, and extending service life across various machinery types. From hydraulic cylinders to pneumatic valves, X-rings are found throughout modern equipment systems. In hydraulic equipment, they are particularly effective in reciprocating or rotating motion, preventing internal oil leakage and maintaining system efficiency. In pneumatic devices, X-rings can maintain air tightness even under fluctuating temperatures and high-frequency operations, a feature especially valued in automated production lines. Their versatility also extends to automotive assemblies, where they serve in brake systems, gearboxes, and steering components—areas that demand both chemical resistance and mechanical durability. When choosing an X-ring seal, the selection of material is often a decisive factor. Common options include NBR (Nitrile Rubber) for general oil resistance, FKM (Viton or Fluoroelastomer) for high-temperature and chemical stability. The key lies in matching the compound to the specific working environment— pressure, temperature, and fluid type—since a mismatch can result in premature failure or seal deformation. Proper installation is equally critical. An often-overlooked detail is ensuring the groove dimensions correspond to the X-ring’s cross-section, preventing compression set or twisting. Applying the right amount of compatible lubricant during assembly can help minimize friction and surface abrasion. Many maintenance engineers have noted that even small deviations during installation —like uneven pressure or improper stretching—can shorten a seal’s lifespan significantly. These are practical lessons learned from real workshop experiences rather than theoretical guidelines. As global industrial automation continues to expand, the demand for reliable sealing components has grown in sectors such as construction machinery, marine systems, chemical equipment, and renewable energy. Dealers and distributors in these industries often look for suppliers who can not only provide a complete product range but also offer flexible delivery and technical support. In this regard, brands like NQKSF have established strong reputations for consistency and expertise. With more than 30 years of experience in the sealing field, NQKSF provides comprehensive solutions that go beyond standard supply. Its services include rapid delivery of standard parts, covering thousands of specifications for O-rings, oil seals, and X-rings to ensure immediate availability. For projects requiring unique configurations, the company offers customized support, guiding customers through material selection, structural design, and prototype testing. These tailored services have proven valuable for distributors and OEMs managing complex machinery or multi-brand systems. Furthermore, NQKSF’s technical empowerment initiative helps customers optimize seal performance, reduce downtime, and extend equipment reliability—reflecting a deeper commitment to engineering collaboration. Behind these services stands a strong manufacturing foundation. NQKSF operates as an intelligent factory and recognized high-tech enterprise, with seals sold to more than 80 countries worldwide. The company is also acknowledged as a provincial innovation center and part of a specialized industrial cluster, demonstrating its role as an industry leader in China’s sealing market. Its wide product catalog, consistent inventory, and global distribution network have made it a trusted partner for dealers seeking both quality and continuity. The application of X-ring reaches far beyond a single industry—they are an essential element in maintaining fluid stability, safety, and system performance across countless mechanical systems. Their effectiveness depends not only on material selection and precise installation but also on collaboration with suppliers who understand the nuances of each operating environment.

Minimum Order: 1000