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Union seals are critical components in oil and gas flowline systems, especially where quick-connect, high-pressure pipe connections are required. Commonly associated with hammer unions, union seals ensure a tight, leak-free connection under extreme pressure and vibration. But what exactly is a union seal, and why is it so important in oilfield applications? What Is a Union Seal? A unio...
The packer element is a flexible, elastomeric (rubber-like) sealing component. It's designed to expand radially outward to form a tight, pressure-resistant seal between the outside of the production tubing and the inside of the casing or wellbore wall. Materials: They are not just simple rubber rings. They are engineered from advanced elastomers (like NBR, HNBR, FKM, AFL...
What is an Extrusion Gap? An extrusion gap refers to the clearance or space between two mating surfaces in a sealing system, typically between the seal and the hardware (e.g., a piston and cylinder bore, or a rod and gland) where the seal is installed. Under pressure, the seal material may tend to flow or "extrude" into this gap, which can lead to seal damage, reduced performance, or failure over ...
Surface finish is a critical factor in polymer seal performance because it directly impacts sealing effectiveness, friction, and durability. Unlike softer elastomers which can conform to rough surfaces, most polymer materials are harder and require specific surface textures to create a reliable, long-lasting seal. Key Reasons Why Surface Finish Matters: Sealing Effectiveness: A proper ...
AED (Anti-Explosive Decompression) / RGD (Rapid Gas Decompression) resistance is a critical property for oil and gas seals because it prevents catastrophic failure, ensures safety, and maintains operational integrity in high-pressure gas environments. Mechanism of Failure In oil and gas applications, seals are frequently exposed to high-pressure gas (such as methane, CO2, and H2...
What Is a V-Stack Seal Assembly? A V-Stack Seal Assembly—often referred to as a seal stack or V-packing stack—is a combination of multiple sealing elements arranged in a stacked configuration. Each element features a chevron-shaped profile, allowing the stack to energize under pressure and create a reliable, long-lasting seal. Because the individual rings flex and adapt to pressure cha...
In hydraulic and pneumatic seals, main seals such as O-rings receive much attention, but their performance relies on an often overlooked component: the back up ring. What is a Back up Ring? A back up ring is a rigid ring installed next to the seal to prevent it from being squeezed into the metal gap under high pressure. Back up rings are essential when system pressu...
In the oil and gas industry, ensuring a secure seal in wellhead equipment is crucial for safety and preventing leaks. P-seals provide a high-performance solution designed to withstand extreme conditions, making them essential in wellhead systems. So, what exactly is a P-seal, and why is it so important? What is a P-Seal? P seal is constructed from an elastomer with back up rings for anti-ex...
JST’s advanced HNBR compound, designated by material code H3385 (HNBR85), is a premium elastomer specifically formulated for demanding rubber sealing applications. Renowned for its exceptional durability and chemical resistance, this material sets a high standard for reliability in critical environments. Key Properties & Certifications: NORSOK M-710 Compliance: Successfully passes...
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