Although O-rings are small, they play an extremely important sealing role in the operation of construction machinery.  Just like a loyal guardian silently guarding and ensuring the normal operation of the equipment.  Once the O-ring wears out, it will affect the production efficiency and cause safety hazards.  So how can we avoid the wear of O-rings?

Material Compatibility

Temperature Adaptation

High temperatures (-20°C to 200°C): Use FKM (Fluorocarbon Rubber).

Low temperatures (-60°C to 225°C): Choose Silicone Rubber.

High-vacuum environments: Select Fluorosilicone Rubber.

Radiation exposure: Opt for HNBR (Hydrogenated Nitrile Rubber).

Chemical Resistance

NBR: Resists petroleum-based oils/lubricants but not strong acids/alkalis.

EPDM: Handles acids/alkalis effectively.

Correct Installation Methods

Surface Preparation

Ensure surfaces are smooth, burr-free, and without sharp edges.

Polish with sandpaper/files to achieve proper roughness.

Tool Selection

Small O-rings: Use dedicated installation sleeves.

Large O-rings: Employ mechanical aids.

Never: Use sharp tools (e.g., screwdrivers) for installation.

Seal Structure Optimization

Compression Control

Maintain 15-30% compression ratio.

50% compression causes excessive friction and wear.

Example: Precisely calculate piston-cylinder gaps in hydraulic seals.

Twist Prevention

Match O-ring cross-section to groove dimensions.

Ensure grooves prevent operational twisting.

Operational Parameter Alignment

Pressure Management

Keep pressure within rated ranges (e.g., 10-20 MPa for small NBR O-rings).

Install pressure relief valves in high-pressure systems.

Speed Limitations

High reciprocating speeds increase friction heat and wear.

Select materials suited to motion speeds.