Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
KR - Type Piston Seals for Hydraulic Cylinders
Engineered for High - Pressure Resistance & Long - term Wear Compensation
Ideal for high-pressure hydraulic systems, these seals feature a V-shaped design with wear-compensating technology to prevent leakage in reciprocating pistons (industrial cylinders, heavy machinery).
- Core Role: Maintains pressure stability, stops fluid loss.
- Key Features: Handles up to 300bar, -35℃ to +110℃; low-friction, durable materials.
- Advantages: Self-tightens under pressure, reduces wear, extends service life.
- Value: Cuts downtime, lowers maintenance, boosts system efficiency.
A reliable solution for demanding sealing needs.
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Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
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Product Advantages
Superior Sealing Integrity: The V-shaped structure with self-tightening technology ensures a tighter seal as pressure increases, minimizing leakage even in high-pressure (up to 300bar) environments.
Extended Service Life: Equipped with wear-compensating elastic elements, the seals automatically adjust for minor wear, reducing replacement frequency and maintenance costs.
Wide Operating Range: Withstands temperatures from -35℃ to +110℃ (short-term up to 125℃) and resists oils, greases, and harsh industrial fluids, adapting to diverse working conditions.
Low Friction Performance: The modified polyurethane sliding ring reduces friction during reciprocating motion, lowering energy loss and enhancing system efficiency.
Working Principle
The KR-type seal consists of two key components: a wear-resistant polyurethane sliding ring and an NBR elastic expansion element. When hydraulic pressure is applied, the elastic element deforms, pushing the sliding ring tightly against the cylinder wall to form an initial seal. As pressure increases, the V-shaped design of the sliding ring "spreads," amplifying the contact force with the cylinder—creating a self-reinforcing seal that prevents fluid leakage. During long-term use, the elastic element continuously compensates for wear on the sliding ring, maintaining consistent sealing performance.
Product Details
Materials: Sliding ring (modified polyurethane for abrasion resistance); expansion element (NBR rubber for elasticity and chemical resistance).
Dimensions: Customizable to fit standard ISO 15074，with precise tolerances ensuring compatibility with industrial cylinders.
Installation: Designed for easy integration into piston grooves, requiring minimal assembly time and reducing installation errors.
Testing: Each unit undergoes pressure and temperature resistance tests to guarantee compliance with industry standards.
Application Range
Industrial hydraulic cylinders (e.g., presses, injection molding machines).
Heavy machinery (construction equipment, agricultural machinery, mining vehicles).
Mobile hydraulic systems (steering cylinders, lift mechanisms).
Any reciprocating piston application demanding low leakage and high durability.
FAQ
Q: What is the maximum pressure the KR seal can handle?
A: It operates reliably up to 300bar, making it suitable for medium to high-pressure hydraulic systems.
Q: Can it be used with different hydraulic fluids?
A: Yes, the materials resist mineral oils, synthetic fluids, and most industrial lubricants (contact us for specific fluid compatibility).
Q: How often should the seals be replaced?
A: Service life varies by application, but the wear-compensating design typically extends replacement intervals by 30% compared to standard seals.
FOREVER SEALS Advantages
Quality Commitment: Over 20 years of expertise in sealing solutions, with ISO 9001 certification ensuring consistent production standards.
Customization: Ability to tailor dimensions and materials to meet unique customer requirements.
Global Support: Fast delivery through a worldwide distribution network and responsive technical support for installation and troubleshooting.
Sustainability: Eco-friendly manufacturing processes and recyclable packaging, aligning with green industry practices.
Trust FOREVER SEALS to deliver reliable, long-lasting sealing solutions for your critical hydraulic systems.
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