{"id":1492,"date":"2026-05-11T16:08:42","date_gmt":"2026-05-11T08:08:42","guid":{"rendered":"http:\/\/8.211.42.149\/?post_type=myproducts&p=1492"},"modified":"2026-06-02T16:53:15","modified_gmt":"2026-06-02T08:53:15","slug":"r21","status":"publish","type":"products","link":"https:\/\/walleglobal.com\/de\/products\/r21\/","title":{"rendered":"R21"},"content":{"rendered":"
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R21<\/h2>\n<\/div>\n\n\n\n
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Temp range<\/td>-30\u00b0C~200\u00b0C<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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Product Overview<\/strong><\/div>
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The uploaded image illustrates a high-performance Composite T-Sealing Ring (or Slip Ring Assembly)<\/strong> featuring a unique multi-component geometric cross-section.<\/p>\n\n\n\n

The Core Element:<\/strong> The central green component acts as the primary elastomeric seal body. Its T-shaped upper flank provides a robust static\/dynamic sealing surface, while its curved, bulbous bottom profile optimizes pressure distribution and energizes the seal.<\/p>\n\n\n\n

The Back-up Supports:<\/strong><\/strong> Flanking the primary seal are two symmetrical brown components. These function as anti-extrusion back-up rings (or guide rings)<\/strong><\/strong>. They are strategically positioned to fill the clearance gaps, preventing the softer primary seal from migrating or extruding under extreme high-pressure bidirectional cycles.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

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Material Characteristics<\/strong><\/div>
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To meet demanding industrial environments, this composite seal typically utilizes a combination of advanced materials engineered for synergy:<\/p>\n\n\n\n

Primary Seal Body (Green):<\/strong> Usually molded from high-grade Polyurethane (PU)<\/strong>, Fluoroelastomer (FKM\/Viton)<\/strong>, or Nitrile Rubber (NBR)<\/strong>. These materials offer exceptional elasticity, superior wear resistance, low compression set, and excellent sealing capabilities against various hydraulic fluids.<\/p>\n\n\n\n

Back-up Rings (Brown):<\/strong><\/strong> Typically fabricated from rigid, low-friction polymers such as Virgin or Carbon-filled PTFE (Teflon)<\/strong><\/strong>, Polyoxymethylene (POM)<\/strong><\/strong>, or Nylon (PA)<\/strong><\/strong>. These materials deliver excellent mechanical strength, high structural rigidity, and a very low coefficient of friction to minimize wear on the mating hardware.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

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Structural & Performance Advantages<\/strong><\/div>
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Superior Anti-Extrusion Capability:<\/strong> The dual back-up rings drastically reduce the risk of material extrusion into hardware clearance gaps, allowing the seal to operate flawlessly under ultra-high-pressure conditions.<\/p>\n\n\n\n

Bi-Directional Sealing Efficiency:<\/strong> The perfectly symmetrical cross-section ensures identical, highly reliable sealing performance in both directions of reciprocating motion.<\/p>\n\n\n\n

Low Friction & Smooth Motion:<\/strong> The integration of low-friction guide materials on the flanks prevents “stick-slip” phenomena (jerky movements) during startup and low-speed operations, significantly extending the service life.<\/p>\n\n\n\n

Optimized Contact Pressure:<\/strong><\/strong> The rounded lower profile ensures that as system pressure increases, the contact force distributes dynamically and evenly against the sealing surface, maximizing sealing integrity without inducing excessive wear.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

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Application Scope<\/strong><\/div>
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Thanks to its robust heavy-duty design, this composite sealing system is widely utilized in high-pressure hydraulic and pneumatic systems across various industries:<\/p>\n\n\n\n

Construction Machinery:<\/strong> Excavators, loaders, bulldozers, and cranes where heavy impact loads and high pressures are constant.<\/p>\n\n\n\n

Agricultural Equipment:<\/strong> Hydraulic cylinders for tractors and heavy harvesting machinery.<\/p>\n\n\n\n

Industrial Hydraulics:<\/strong> High-tonnage hydraulic presses, injection molding machines, and scrap metal balers.<\/p>\n\n\n\n

Oil & Gas Sector:<\/strong> Subsea valves, drilling equipment, and wellhead control systems operating under extreme pressure fluctuations.<\/p>\n\n\n\n

Automotive & Aerospace:<\/strong><\/strong> Heavy-duty shock absorbers, landing gear actuators, and specialized steering mechanisms.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

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