Downloads: O-ring Grooves Regulations

Downloads: O-ring Grooves Regulations

O-Ring Grooves for Static Sealing Applications

Static sealing is crucial in various industrial and mechanical systems where the sealed machine parts do not move relative to each other. O-rings, with their versatile design and resilient properties, are highly suitable for static sealing applications, providing an effective barrier against fluid or gas leakage.

Recommended Installation Dimensions for Reliable Sealing

To ensure dependable sealing performance, it's essential to adhere to recommended installation dimensions. Proper installation parameters, including groove dimensions, groove width, depth, and clearance gaps, play a pivotal role in maximizing the effectiveness of O-ring seals.

Types of Static Sealing Installations:

  1. Radial Compression: In this type of installation, the cross-section of the O-ring is compressed radially. The O-ring groove is typically provided on either the inner or outer component part.

  2. Axial Compression: With axial compression, the O-ring's cross-section is compressed in the axial direction. The specific compression requirements depend on whether pressure acts from inside or outside the sealed component.

  3. Trapezoidal Groove: The trapezoidal groove features a special geometry that prevents the O-ring from falling out after installation. This design is advantageous for overhead installations or machine parts that undergo regular opening and closing.

  4. Triangular Groove: While rectangular grooves are typically recommended for O-ring seals, certain design constraints may necessitate the use of triangular grooves, particularly for sealing covers or flanges. Strict adherence to tolerances is essential for ensuring safe functionality in such cases.

Static Vacuum Sealing Considerations:

Sealing in vacuum environments requires special considerations to ensure optimal performance:

  • Surface quality of all sealing faces must be exceptionally high.
  • Compliance with recommended installation dimensions results in higher O-ring preload and better filling of the groove, prolonging the diffusion path of gases through the elastomer.
  • Using multiple O-rings consecutively and applying vacuum grease can help reduce total leak rates.
  • Fluoro rubber O-rings have demonstrated excellent results in many vacuum sealing applications, offering enhanced durability and reliability.

By understanding the various types of static sealing installations and adhering to recommended practices, engineers and operators can optimize the performance of O-ring seals in diverse industrial and mechanical systems, ensuring long-term reliability and efficiency.

Dynamic Sealing


Dynamic Sealing: Hydraulic


Dynamic Sealing: Pneumatic


Dynamic Sealing: Hydraulic, Radial Compression


Dynamic Sealing: Pneumatic, Radial Compression


O-ring Groove Design:




Lead-in Chamfers


Gap dimensions