Hydraulic Star-shaped U-ring MPS Combination U + S Seal is a precision sealing component developed specifically for high-pressure hydraulic systems. It innovatively integrates the bidirectional sealing capability of the U-shaped seal structure with the elastic compensation advantages of the star-shaped S-ring, forming a core design of 'dual sealing + elastic self-adaptation'. The product is made from imported high-quality elastomeric materials through precise molding and secondary vulcanization processes. It can maintain excellent sealing performance under extreme pressure, temperature fluctuations, and complex medium environments. It effectively solves industry pain points such as easy wear, leakage, and short service life of traditional sealing components, providing stable and long-lasting sealing protection for hydraulic equipment.

Dual-structure compound design, doubled sealing performance

• U-shaped main seal layer: Adopting an optimized lip angle design, the lip automatically adheres to the sealing surface under pressure, forming a bidirectional sealing barrier that can withstand up to 40MPa working pressure, effectively blocking leakage of media such as hydraulic oil and emulsions;
• S-shaped star elastic ring: Embedded inside the U-shaped structure, it provides continuous elastic compensating force, automatically adapting to minor deformations and wear of the sealing surface, eliminating gap leakage risks. At the same time, it reduces the friction coefficient between the seal and the contact surface, lowering power loss.

Selection of high-end materials for complex working conditions

• The main material can be composed of PU + NBR, which has wear-resistant and high-pressure resistant properties.
• The material has excellent tear resistance (≥15kN/m), compression set resistance (≤20%), and temperature resistance range (-30℃~120℃), capable of withstanding the harsh working conditions of hydraulic systems.

Precision manufacturing process with stable and reliable quality

• Formed using CNC precision molds, dimensional tolerance is controlled within ±0.02mm, ensuring perfect fit with the seal groove;
• After 24-hour high-temperature aging test, 100,000-cycle pressure test, and medium immersion test, the product pass rate reaches 99.8%, and the service life is 3~5 times longer than that of traditional seals.

Thanks to its excellent sealing performance and wide adaptability, this product has been successfully applied to hydraulic systems in multiple fields:

• Industrial Machinery: Sealing of hydraulic cylinders and hydraulic valve groups in hydraulic machine tools, injection molding machines, presses, and cranes;
• Construction Machinery: Sealing of hydraulic executive components and hydraulic pipe fittings in excavators, loaders, and bulldozers;
• Automotive Industry: Sealing of hydraulic braking systems and hydraulic power steering systems in commercial vehicles;
• Energy Equipment: Sealing of wind power hydraulic systems, hydraulic pump stations, and hydraulic motors;
• Other Fields: Hydraulic components in aerospace, hydraulic systems in ships, and hydraulic devices in agricultural machinery, etc.