This article aims to systematically describe customized sealing solutions for hydraulic cylinders in engineering machinery. By showcasing specific piston and piston rod sealing system pairings and their performance under typical machine models and application conditions, it demonstrates their high reliability and durability in harsh environments.
- Sealing system
| Operating Condition Challenge | Piston Seal System Core Solution | Piston Rod Seal System Core Solution | Core Value |
| High Pressure & Demanding Conditions | Uses a combination to prevent adiabatic compression damage and remove impurities. |
Uses HBY a structure paired with Nitrile Rubber (A505) and a backup ring (19VF) to ensure long service life.
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Ultra-High Durability |
| High-Temperature Environment |
The rubber ring is made of SPGW hydrogenated nitrile rubber (HNBR).
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Uses heat-resistant iron-based rubber ( UH95 ) and hydrogenated nitrile rubber ( G928 ).
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Excellent Heat Resistance |
| Severe Cold Environment |
The supporting ring SPGWuses cold-resistant special rubber.
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The main seal UJH uses cold-resistant special rubber (A567).
|
Outstanding Cold Resistance |
| Ultra-Short Stroke / High Pressure |
Uses a special piston seal OUV to prevent oil film destruction.
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Paired with a Polyamide Resin (80NP) backup ring, suitable for conditions with small pressure fluctuations.
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High-Pressure Stability |
| Large Lateral Load |
Uses a medium-pressure compact seal SPG and dual WR to resist scoring.
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Uses UJS with backup ring and oil-scraper-proof wiper seal DKB1.
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Side Load Resistance & Anti-Scraping |
| Suppressing Sliding Heat Generation |
Uses a medium-pressure compact seal SPG.
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Uses the HBY (U641+12NM) structure to suppress heat generation; the main seal uses A505.
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Low Friction & Temperature Control |
- Model and operating conditions matching
| Application Machine Model | Main Application Cylinders | Pressure/Temperature | Optional Specifications |
| Hydraulic Excavator | Boom, Arm, Bucket Cylinders | 0-34.3 MPa / -30°C ~ +100°C |
Heat-Resistant Spec: Up to +120°C Cold-Resistant Spec: Down to -50°C |
| Grease Cylinder (Adjusting Cylinder) | 0-78.5 MPa / -30°C ~ +100°C | ||
| Small Construction Equipment, Mini Backhoe | Boom, Arm, Bucket, Blade Cylinders | 0-20.6 MPa / -30°C ~ +100°C | |
| Wheel Loader | Lift, Bucket, Steering Assistant Cylinders | 0-20.6 MPa / -30°C ~ +100°C |
This article is intended to share knowledge and is for reference purposes only. If there are any copyright concerns or if you have a different perspective on the information provided, please contact us for resolution.
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