{"id":1501,"date":"2026-05-11T16:40:41","date_gmt":"2026-05-11T08:40:41","guid":{"rendered":"http:\/\/8.211.42.149\/?post_type=products&p=1501"},"modified":"2026-06-02T16:58:01","modified_gmt":"2026-06-02T08:58:01","slug":"p03","status":"publish","type":"products","link":"https:\/\/walleglobal.com\/de\/products\/p03\/","title":{"rendered":"P03"},"content":{"rendered":"
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P03<\/h2>\n<\/div>\n\n\n\n
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Max pressure<\/td>500 Bar<\/td><\/tr>
Temp range<\/td>-30\u00b0C~110\u00b0C<\/td><\/tr>
Max speed<\/td>0.5m\/sec<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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Product Overview<\/strong><\/div>
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The P03 type seal is a high-performance asymmetric U-shaped piston seal composed of polyurethane (PU) and polyoxymethylene (POM) integrated retaining ring. Adopting an asymmetric U-shaped cross-section structure, the seal is equipped with a pressure relief safety groove and an integral anti-extrusion ring. The outer sealing lip is designed with a retracted structure, and the inner diameter forms an interference fit with the groove bottom diameter. Compliant with ISO 5597 standard cavity dimensions, it is a professional one-way piston seal optimized for heavy-duty hydraulic working conditions, supporting back-to-back installation for dual-sided pressure scenarios.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

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Material Characteristics<\/strong><\/div>
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  • Polyurethane (PU)<\/strong>: The main sealing body adopts high-performance polyurethane material, featuring excellent elasticity, compression resilience, wear resistance and superior static and dynamic sealing performance. It adapts to long-term frequent reciprocating motion of heavy-load hydraulic cylinders with stable sealing effect and strong fatigue resistance.<\/li>\n\n\n\n
  • Polyoxymethylene (POM)<\/strong>: The integral POM retaining ring provides high rigidity and outstanding anti-extrusion capacity. It effectively supports the sealing body under high pressure, prevents seal deformation and extrusion damage, and greatly improves the overall structural stability and pressure resistance of the product.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n
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    Structural & Performance Advantages<\/strong><\/div>
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    • Standard ISO 5597 Cavity<\/strong>: Designed in strict accordance with ISO 5597 international standard groove specifications, it has strong versatility and interchangeability, convenient for standardized installation and replacement of equipment.<\/li>\n\n\n\n
    • Asymmetric U-shaped Cross-section & Retracted Outer Lip<\/strong>: The optimized asymmetric U-shaped structure and retracted outer sealing lip reduce running friction, optimize stress distribution, and improve the stability of dynamic reciprocating sealing.<\/li>\n\n\n\n
    • Interference Fit Design<\/strong>: The inner diameter is in interference fit with the groove bottom diameter, providing continuous and stable preload force to ensure tight fitting and zero-gap sealing.<\/li>\n\n\n\n
    • Excellent Static & Dynamic Sealing Performance<\/strong>: It maintains reliable pressure holding performance in static state and stable leakage-free sealing effect during high-frequency dynamic operation, adapting to long-term continuous heavy-duty work.<\/li>\n\n\n\n
    • High Anti-extrusion Performance<\/strong>: Equipped with an integral POM retaining ring, the product features ultra-high anti-extrusion ability, effectively resisting high-pressure extrusion and avoiding seal failure under large gap and high-pressure working conditions.<\/li>\n\n\n\n
    • Back-to-back Installation for Dual-sided Pressure<\/strong>: When the piston bears pressure on both sides, multiple P03 seals can be arranged back-to-back to realize stable two-way sealing, with strong adaptability to complex pressure alternating working conditions.<\/li>\n\n\n\n
    • Pressure Relief Safety Groove Design<\/strong>: The unique pressure relief safety groove effectively eliminates dynamic hysteresis stress and stick-slip problems during operation, ensuring smooth and stable movement of the cylinder.<\/li>\n\n\n\n
    • High Operational Reliability<\/strong>: The composite structure of PU main body and POM integral retaining ring, combined with optimized groove design, effectively reduces failure rate and ensures long-term stable operation of heavy-duty equipment.<\/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 heavy-duty construction machinery, scrap steel shearing machinery and other heavy-load hydraulic equipment. It is suitable for high-pressure and heavy-duty piston sealing scenarios with bidirectional pressure alternating working conditions.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

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