o-ring Archives - KODA oil seal and O-ring

Do Silicone O-Rings Stretch?

Maggie September 4, 2026 September 4, 2026

Do silicone O-rings stretch?Yes. Silicone O-rings are flexible elastomeric seals that can be stretched during installation, but flexibility does not mean unlimited elongation is acceptable. In an OEM sealing application, an O-ring that is stretched too far may look perfectly normal during assembly while its cross-section becomes smaller than intended. That reduction can decrease sealing squeeze, increase the risk of

O-Ring Size Guide: How to Measure, Identify, and Order the Right Size Every Time

Maggie August 31, 2026 August 31, 2026

Why O-Ring Size Matters More Than It Seems Choosing an O-ring is often treated as a simple measurement task: measure the old seal, find the closest size in a chart, and place an order. In engineering applications, however, O-ring size selection is a sealing-design problem, not simply a dimension-matching exercise. The correct O-ring must match the groove geometry, required squeeze,

Standard vs. UL Listed O-Rings: When to Use Each

Maggie August 27, 2026 August 27, 2026

When engineers specify an O-ring for a new machine, the decision is rarely as simple as choosing the correct size. The application may require a particular elastomer, hardness, temperature range, pressure capability, chemical resistance, compression set performance, and regulatory status. One question becomes especially important when equipment is intended for electrical, industrial, fluid-handling, appliance, enclosure, or safety-related applications: Should the

Selecting Teflon® Encapsulated O-Rings for Reliable Sealing

Maggie August 17, 2026 August 17, 2026

Understanding Teflon® Encapsulated O-Rings for Reliable Sealing Selecting the right sealing material is rarely as simple as choosing an elastomer with the highest temperature rating or the broadest chemical-resistance chart. In demanding industrial equipment, the seal must often withstand aggressive chemicals, elevated temperatures, pressure cycling, vacuum, cleaning agents, process fluids, and dimensional changes while maintaining sufficient sealing force. This is

Safety with Metal Detectable O-Rings

Maggie August 14, 2026 August 14, 2026

Why Metal Detectable O-Rings Matter for Modern Manufacturing Safety Metal detectable O-rings are engineered sealing components designed to provide the normal sealing function of an elastomer while also improving the ability of a production line to identify fragments or particles that may enter a product stream after seal damage. They are particularly valuable in food processing, beverage production, pharmaceutical manufacturing,

Mastering O-Ring Durometer Scales

Maggie August 13, 2026 August 13, 2026

Understanding O-Ring Durometer Scales and Why They Matter O-ring performance depends on far more than nominal size and polymer family. One of the most important material specifications is hardness, commonly expressed as Shore A durometer. When engineers specify an O-ring as 70 Shore A, 80 Shore A, or 90 Shore A, they are defining a measurable indentation-hardness characteristic that influences

The Importance of O-Ring Tolerance

Maggie August 10, 2026 August 10, 2026

O-ring tolerance is one of the most important but frequently underestimated factors in sealing-system design. An O-ring may have the correct nominal size, material, hardness, and compound designation, yet still fail to seal reliably if its dimensional tolerance is not appropriate for the application. For engineers, purchasers, maintenance teams, and manufacturers, understanding O-ring tolerance means understanding how small dimensional variations

Ancient Origins to the Future of Seals

Maggie August 7, 2026 August 7, 2026

From Ancient Origins to the Future of Seals: The Evolution of Sealing Technology Sealing technology has existed for thousands of years, evolving from simple natural materials used by ancient civilizations into highly engineered components capable of operating in extreme environments. From early clay and leather barriers used to control water flow to modern elastomer, polymer, and advanced composite seals used

The Impact of Temperature on O-Rings

Maggie August 4, 2026 August 4, 2026

The operating temperature of an O-ring is one of the most critical factors influencing sealing reliability, leakage prevention, service life, compression set, and overall equipment performance. Whether used in hydraulic systems, pneumatic equipment, automotive engines, aerospace components, food processing machinery, or semiconductor manufacturing, every O-ring material has a specific temperature range where it performs optimally. Exceeding these limits may cause

Choosing Backup Rings: A Guide

Maggie July 29, 2026 July 29, 2026

What Are Backup Rings and Why Are They Important? Backup rings, also known as anti-extrusion rings, are rigid sealing components installed alongside elastomer O-rings to prevent seal extrusion when systems operate under elevated pressure. In hydraulic, pneumatic, chemical processing, aerospace, and heavy industrial equipment, pressure can force an O-ring into the clearance gap between mating components. Once extrusion begins, the

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