LBH Forklift Cylinder Dust Seal NBR Material Plastic Injection Cylinder Hydraulic Seal

The LBH-type hydraulic cylinder dust seal is a bidirectional-acting dust-proof component mainly made of nitrile butadiene rubber, featuring an acute-angle edge double-lip structure. It can effectively scrape dirt off the surface of the piston rod while retaining an oil film. It is widely used in hydraulic and other reciprocating motion systems to block impurity intrusion, protect equipment, and maintain sealing performance.

• Dual-Lip Design - Primary lip retains lubricants, secondary lip excludes dust and contaminants
• Wide Temperature Range - Performs reliably from -20°C to +110°C (NBR standard)
• High-Pressure Resistance - Withstands system pressures up to 21 MPa
• Easy Installation - Precision dimensions ensure perfect fit in standard gland grooves

• Construction Equipment - Excavator cylinders, bulldozer arms, crane actuators
• Agricultural Machinery - Tractor hydraulic systems, harvester cylinders
• Industrial Presses - Hydraulic stamping machines, injection molding equipment
• Mining Equipment - Drilling rig cylinders, roof support systems
• Material Handling - Forklift hydraulics, conveyor system actuators
• Marine Applications - Ship steering systems, hatch control cylinders

• Dust-proof sealing with high efficiency: The dual-lip design can strongly scrape off impurities, while also retaining oil film to reduce wear, protecting the hydraulic system.
• Strong adaptability to working conditions: Made of NBR material, it is oil-resistant and wear-resistant, compatible with various media, and can work stably in high-pressure, high-temperature, and low-temperature environments.
• Easy installation and maintenance: Compact structure that can be directly installed into grooves, with a full range of specifications for convenient replacement, reducing equipment downtime.
• Outstanding cost-performance: Reliable performance with competitive pricing, strong durability to reduce replacement frequency, and lower long-term maintenance costs.

• Clean Work Area - Ensure clean environment free from contaminants
• Inspect Housing - Verify bore dimensions and surface finish (Ra ≤ 0.8 μm)
• Lubricate Properly - Apply compatible lubricant to seal lips and shaft
• Use Installation Tools - Employ proper mandrels to prevent damage during pressing
• Correct Orientation - Install with dust lip facing external environment
• Verify Placement - Ensure seal is fully seated against housing shoulder

• Using sharp or improper installation tools
• Dry installation without lubrication
• Misalignment during pressing operation
• Damaging seal lips on sharp edges or threads