The UDH-type piston rod seal is a proprietary, high-performance sealing element specifically engineered for hydraulic cylinder piston rods. It embodies a next-generation design philosophy that goes beyond conventional rod seals to deliver exceptional sealing integrity and durability in the most challenging hydraulic environments.
Core Design Features & Advantages:
Dual-Function Integrated Design: The UDH seal ingeniously combines a primary sealing element and a dedicated dirt wiper/scraper into a single, cohesive unit. This ensures a compact installation while guaranteeing dual-layer protection.
Advanced Sealing Geometry: Its profile features a precision-engineered, asymmetrical sealing lip with a contoured heel.
The lip geometry creates an optimal, pressure-activated sealing line that intensifies with system pressure, ensuring zero external leakage.
The contoured heel profile manages internal lubrication film, minimizing friction and wear for smooth, efficient operation.
Dynamic Contaminant Defense: The integral, robust wiper lip is designed to aggressively and effectively scrape off mud, grit, ice, and other abrasive contaminants from the rod during retraction, preventing them from entering the seal chamber and damaging the system.
High-Pressure & Anti-Extrusion Design: Engineered for stability under extreme pressure, the UDH seal is often used in conjunction with a high-strength anti-extrusion ring. This combination prevents the seal material from deforming into the rod-gap clearance, even under severe pressure spikes and side loads.
Premium Material Options: Typically manufactured from high-grade, wear-resistant polyurethane (PU) or other advanced thermoplastics, offering excellent compatibility with hydraulic oils (HFA, HFB, HFC, HFD), superior abrasion resistance, and a wide operating temperature range.
Key Performance Benefits:
Absolute Leakage Control: Provides a reliable, leak-free performance, meeting stringent environmental and operational standards.
Maximum System Protection: The integrated scraper significantly extends the life of the entire cylinder by keeping contaminants out.
Exceptional Durability: Resists wear, extrusion, and harsh media, resulting in longer maintenance intervals and reduced downtime.
High Load & Pressure Capability: Robust design ensures reliable function in high-pressure applications and under heavy side loads.
Simplified Inventory & Assembly: Replaces two separate components (seal + wiper) with one, reducing part numbers and simplifying the gland design and installation process.
Typical Applications:
Ideal for heavy-duty hydraulic cylinders subjected to harsh conditions, such as those in:
Construction Machinery (Excavators, Bulldozers, Cranes)
Mining Equipment
Agricultural Machinery
Marine and Offshore Hydraulics
Industrial Presses
In summary, the UDH Piston Rod Seal is a rugged, integrated sealing system designed for the toughest hydraulic applications. It delivers uncompromising sealing performance and superior contaminant exclusion, ensuring maximum reliability and longevity for critical hydraulic equipment.
Original text from: pneumatic seal https://www.bszzseal.com/
