{"id":1496,"date":"2026-05-11T16:13:50","date_gmt":"2026-05-11T08:13:50","guid":{"rendered":"http:\/\/8.211.42.149\/?post_type=myproducts&p=1496"},"modified":"2026-06-02T16:54:52","modified_gmt":"2026-06-02T08:54:52","slug":"r28","status":"publish","type":"products","link":"https:\/\/walleglobal.com\/de\/products\/r28\/","title":{"rendered":"R28"},"content":{"rendered":"
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R28<\/h2>\n<\/div>\n\n\n\n
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Max pressure<\/td>600 Bar<\/td><\/tr>
Temp range<\/td>-30\u00b0C~110\u00b0C<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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Product Overview<\/strong><\/div>
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The R28 type seal is a double-acting symmetric compression seal manufactured from high-performance polyurethane (PU) material. It adopts an inner-ring sealing surface design with a symmetrical structure, enabling bidirectional sealing function. The product features strong versatility and can be interchangeably installed in standard O-ring grooves and O-ring back-up ring grooves. It is specially optimized for high-pressure, alternating pressure, large-gap and gas sealing working conditions, and supports ultra-large diameter customization up to 2000mm, widely used in various heavy-duty industrial hydraulic equipment.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

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Material Characteristics<\/strong><\/div>
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Made of high-quality polyurethane (PU) material, it integrates excellent elasticity, compression recovery, abrasion resistance and tear resistance. The material maintains stable sealing performance under long-term high pressure and alternating pressure cycles. It features good gas tightness, outstanding fatigue resistance and durable service life, adapting to complex and changeable industrial working conditions.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

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Structural & Performance Advantages<\/strong><\/div>
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  • Double-acting Symmetrical Compression Structure<\/strong>: Adopts symmetric double-acting sealing design with the inner ring as the sealing surface, achieving reliable bidirectional sealing effect and stable compression performance.<\/li>\n\n\n\n
  • Strong Groove Versatility<\/strong>: It can be freely interchanged and installed in standard O-ring grooves and O-ring back-up ring grooves without modifying the groove structure, reducing equipment transformation cost and improving part compatibility.<\/li>\n\n\n\n
  • Ultra-high Operational Reliability<\/strong>: The integrated symmetrical structure features stable stress distribution, strong pressure impact resistance, and no easy deformation or failure during long-term cyclic operation, ensuring high equipment operation stability.<\/li>\n\n\n\n
  • Simple and Reliable Installation<\/strong>: The structural design is simple and reasonable, realizing quick and convenient assembly without special tools, effectively improving on-site installation efficiency.<\/li>\n\n\n\n
  • Easy Storage<\/strong>: The stable integral structure is not easy to deform during storage and transportation, with low storage and maintenance costs and good inventory adaptability.<\/li>\n\n\n\n
  • Excellent Gas Sealing Performance<\/strong>: It has superior air tightness and can stably seal various gas media, meeting the gas hydraulic hybrid sealing requirements of special equipment.<\/li>\n\n\n\n
  • Large Gap Adaptability<\/strong>: It can adapt to equipment working conditions with large assembly gaps, effectively solving the sealing failure problem of traditional seals in large-gap scenarios.<\/li>\n\n\n\n
  • Professional Static Sealing for Cylinder Head Buffer Device<\/strong>: Specially applicable to static sealing of cylinder head end positioning buffer devices, with good fitting performance and reliable sealing effect.<\/li>\n\n\n\n
  • High Pressure and Alternating Pressure Resistance<\/strong>: It maintains excellent sealing stability under long-term high-pressure operation and frequent alternating pressure impact, with strong working condition adaptability.<\/li>\n\n\n\n
  • Ultra-large Size Range<\/strong>: Supports customized production of super-large diameters, with a maximum applicable diameter of 2000mm, covering various large-scale hydraulic equipment sealing demands.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n
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    Application Scope<\/strong><\/div>
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    Widely used in self-propelled cranes, construction machinery, industrial vehicles, forestry machinery, presses, injection molding machines and power equipment. It is suitable for static sealing, gas sealing, high-pressure sealing and alternating pressure sealing scenarios of various large hydraulic systems.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

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