The USH-Type Piston Rod Seal represents a specialized Universal Seal Hybrid design, engineered for applications demanding robust performance across variable pressure conditions and diverse installation scenarios. Characterized by its adaptable symmetrical geometry, this seal variant integrates operational flexibility with structural resilience.
Symmetrical Bilateral Lip Structure – Dual sealing edges enabling bidirectional sealing capability
Centralized Reinforcement Architecture – Internally stabilized to prevent lip deformation under pressure variance
Homogeneous Material Composition – Typically manufactured from homogeneous polyurethane formulations without composite layering
Uni-body Construction – Eliminates assembly components while maintaining multi-functional performance
Bidirectional Sealing Capacity – Effective sealing in both rod extension and retraction cycles
Pressure Adaptation – Maintains consistent performance from low-pressure initiation to peak pressure operation
Installation Versatility – Symmetrical design eliminates orientation requirements during assembly
Contamination Tolerance – Integral design provides moderate particulate exclusion without separate wiper elements
Thermal Stability – Maintains mechanical properties across moderate temperature variations
Pressure Range: 0-25 MPa (standard grade)
Temperature Tolerance: -30°C to +100°C (material dependent)
Surface Speed: ≤ 0.5 m/s (recommended continuous operation)
Fluid Compatibility: Compatible with most mineral-based hydraulic fluids and water-glycol mixtures
General Industrial Hydraulics – Medium-duty press systems, material handling equipment
Mobile Hydraulic Units – Agricultural implements, utility vehicle cylinders
Process Machinery – Packaging equipment, automated production systems
Standard Hydraulic Testing Apparatus
Retrofit Applications – Direct replacement for worn symmetrical seal configurations
Gland Geometry – Requires precise dimensional compliance with manufacturer specifications
Surface Preparation – Optimal performance with rod hardness ≥ 45 HRC and surface finish Ra ≤ 0.2 μm
Clearance Management – Appropriate radial clearance essential to prevent extrusion
Lubrication Protocol – Initial lubrication recommended during installation
Reduced Inventory Complexity – Single seal type suitable for multiple installation orientations
Simplified Maintenance – Straightforward installation procedures with minimal specialized tools
Cost Efficiency – Balanced performance-to-cost ratio for general industrial applications
Reliability – Proven performance in standard hydraulic operating environments
Specialized Applications – Not optimized for extreme pressure (>40 MPa) or ultra-high-speed applications
Contamination Control – May require supplemental wiper elements in severely contaminated environments
Temperature Extremes – Performance degradation possible outside specified temperature ranges
Rod Scrapers – Recommended for additional contamination protection
Guide Rings – For enhanced rod stability in long-stroke applications
Bearing Elements – For applications with significant side loading
Technical Note: The USH designation typically indicates a standardized symmetrical seal profile suitable for general hydraulic applications. Final selection should be validated against specific operating parameters including fluid type, pressure cycles, and environmental conditions as per manufacturer’s engineering guidelines.
Original text from: pneumatic seal https://www.bszzseal.com/
