Category: O-Rings

Markez® FFKM: A High-Performance Alternative for Demanding Sealing Applications

Summary Introduction Some sealing applications leave no room for compromise. High temperatures, aggressive chemicals, and elevated pressures can quickly degrade standard elastomers, leading to leaks, unplanned downtime, and costly repairs. Markez® FFKM was developed to meet these conditions head-on. As a perfluoroelastomer material available through Global O-Ring and Seal as part of Marco Sealing Solutions, […]

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

Summary Introduction An o-ring looks simple: a rubber loop with a round cross-section. But ordering the correct replacement depends on getting three numbers exactly right, and those numbers can be surprisingly easy to misread from a worn sample, a partial part number, or a faded drawing. This guide walks through the dimensions that define every […]

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

Summary Introduction Standard and UL-listed o-rings often appear similar in size, material, and installation, yet the specification behind each designation can carry different performance and operational implications. In many systems, selecting the correct seal is a decision that must align with the equipment’s safety expectations, operating environment, and level of risk. Understanding the difference between […]

Selecting Teflon® Encapsulated O-Rings for Reliable Sealing

Summary Introduction Teflon® encapsulated o-rings provide reliable sealing in environments where chemical exposure, temperature variation, or cleanliness requirements challenge standard elastomer materials. By combining a chemically resistant fluoropolymer jacket with a resilient elastomer core, these seals offer a practical solution when compatibility and long-term stability are critical to system performance. What Are Teflon® Encapsulated O-Rings? […]

How Tensile Strength Affects O-Ring Performance

Summary Introduction Tensile strength is a fundamental mechanical property that influences how elastomers respond to stress, deformation, and repeated loading. In sealing applications, this property helps determine whether an o-ring can withstand the mechanical demands encountered during installation and service. While tensile strength is often listed as a single value on a material datasheet, its […]

How O-Rings Ensure Reliable Connector Sealing

Summary The Role of O-Rings in Connector Sealing Systems In many applications, connectors serve as sealing interfaces that must protect the connection from external exposure while maintaining system integrity. O-Rings serve as the sealing element, helping connectors resist leakage and contaminant ingress. When integrated into the connector design, they create a barrier that helps protect […]

Viton® (FKM) O-Rings: Properties, Grades, and Industrial Applications

Summary What Are Viton® O-Rings? Viton® (FKM) o-rings are fluoropolymer elastomer seals engineered for extreme service conditions where standard rubber compounds fail. Developed in the late 1950s by DuPont, Viton® is a registered brand name for FKM — fluoroelastomer — a synthetic rubber defined by its high fluorine content. That fluorine content is the source […]

O-Ring Installation Best Practices

Summary Introduction O-Ring performance is often evaluated based on material selection, chemical compatibility, and operating conditions. However, installation is just as critical in determining whether a seal performs as intended. Some sealing issues attributed to material failure or poor design can result from improper handling, inadequate preparation, or incorrect installation techniques. Even a correctly specified […]

What are Bonded Seals

Summary What are Bonded Seals Bonded seals (Dowty Seals, Composite Washer Seals, Gasket Seals) are specialized sealing washers designed to prevent fluid or gas leaks around bolts, screws, and threaded fittings. Each seal consists of a flat metal washer with a rubber sealing element permanently bonded to its inner diameter. This dual-material construction combines the […]

O-Ring Materials, Applications, and Selection

Summary Introduction An o-ring is an elastomeric ring with a round cross-section that forms a seal by squeezing and applying pressure. That sealing mechanism depends on the elastomer returning toward its original shape after deformation (elastic recovery) and maintaining contact pressure against the gland surfaces over time. Because elastomers respond differently to heat, cold, fluids, […]