LH-Type Piston Rod Seal

LH Series: Low-Height Compact Rod Seal System

Product Overview

LH (Low-Height) series represents a breakthrough in space-constrained sealing solutions, delivering full-performance sealing in 40-60% less axial space than conventional designs. Through innovative material science and compression-optimized geometry, LH seals enable cylinder miniaturization without compromising sealing integrity.

Core Technology: Space-Optimized Design

1. Concentrated Performance Architecture

  • Multi-Function Integration: Combines primary seal, anti-extrusion, and guide functions in single compact unit

  • Asymmetric Lip Geometry: Maximum sealing force in minimum axial dimension

  • Radial Preload Optimization: Maintains contact pressure across entire working range

2. Advanced Material Composition

  • LH-Elastomer™: High-modulus polyurethane compound with carbon nanotube reinforcement

  • Compression Recovery: 99% shape recovery after 100% compression at 150°C

  • Space-Stable Formulation: Zero creep or cold flow in confined installations

Technical Specifications

Parameter LH-Standard LH-Performance LH-Ultra
Axial Height 4.5 mm 3.8 mm 3.2 mm
Space Saving 40% 50% 60%
Pressure Rating 250 bar 400 bar 630 bar
Temperature Range -40°C to +110°C -50°C to +135°C -60°C to +150°C
Minimum Groove Depth 5.0 mm 4.2 mm 3.5 mm
Compression Set <8% (24h @ 100°C) <6% (24h @ 120°C) <4% (24h @ 150°C)

Performance Advantages

1. Miniaturization Enablement

  • Direct Retrofit: Replace conventional seals in existing compact designs

  • Space Reclamation: Recovered space allows additional components or reinforcement

  • Weight Reduction: 35-50% lighter than equivalent performance conventional seals

2. Enhanced Reliability

  • Unified Construction: Eliminates inter-component gaps and failures

  • Thermal Management: Integrated heat dissipation channels

  • Contamination Exclusion: Built-in dual-purpose wiper/scraper

Applications

Primary Industries

  • Mobile Robotics: Collaborative arms, AGV lift systems

  • Medical Equipment: Surgical robots, patient positioning

  • Aerospace: Actuators in confined wing/landing gear spaces

  • Automation: Miniature cylinders in assembly systems

  • Electronics Manufacturing: Precision placement equipment

Space-Constrained Scenarios

  • Multi-stage telescopic cylinders

  • Integrated actuator modules

  • Portable hydraulic equipment

  • Embedded industrial machinery

Installation Benefits

1. Simplified Assembly

  • Single-Unit Installation: No complex component stacking

  • Press-Fit Design: Eliminates installation tools for most sizes

  • Visual Alignment: Clear orientation indicators prevent errors

2. Maintenance Advantages

  • Quick Replacement: 70% faster seal change procedures

  • Reduced Inventory: Fewer components to stock and manage

  • Field-Ready: No special equipment required for replacement

Economic Value

1. Direct Cost Savings

  • Material Reduction: 45% less material per seal

  • Manufacturing Efficiency: Simplified production processes

  • Shipping & Storage: Higher density packaging

2. System-Level Benefits

  • Smaller Cylinders: Reduced material and machining costs

  • Compact Machinery: Enables more competitive product designs

  • Retrofit Opportunities: Performance upgrades in space-limited existing equipment

Quality & Compliance

  • ISO 3601-1 Type L (Compact) compliant

  • RoHS & REACH environmental standards

  • FDA-compliant materials available (LH-Medical series)

  • Custom formulation for specific media compatibility

Sustainability Features

  • Material Efficiency: Less raw material consumption

  • Extended Life: 50% longer service life than similar compact seals

  • Recyclability: Single-material construction simplifies recycling

  • Energy Savings: Reduced friction lowers system power requirements


The LH Series transforms space constraints from design limitations into competitive advantages. By delivering uncompromised sealing performance in minimal space, these compact seals enable innovation in miniaturization while improving reliability and reducing total cost of ownership.

Original text from: pneumatic seal https://www.bszzseal.com/