Gas fillded type Metal O-ring Seal introduction

1、standard form gas filled Metal O-ring Seal

The gas filled Metal O-ring Seal is specifically designed for high-temperature applications ranging from 425 degrees Celsius to 980 degrees Celsius. These O-rings contain a gas filling of approximately 40 bar pressure or higher. The gas pressure increases with rising temperatures, compensating for the initial tension deficiency of the flanged joint and increasing the sealing force. While they offer lower pressure resistance compared to the self-energizing type, they excel in high-temperature environments.

2、Non-circular geometric and custom shapes Gas fillded type Metal O-ring Seal. (Racetracks, rectangles, ellipses, etc.)

Coating Options 

To further optimize performance (such as leakage control and environmental resistance), the O-rings are available with the following coating materials: 

- Gold 

- Silver 

- Copper 

- Nickel 

- Tin 

- Polytetrafluoroethylene (PTFE, commonly known as Teflon) 

These coatings not only improve the O-ring’s ability to control leakage but also help maintain higher elasticity when operating at temperatures above 430°C, addressing the issue of reduced flexibility that metal components may face under extreme heat. 

Base Material Selection  

The O-rings are manufactured using high-performance metal materials to ensure structural stability and durability in harsh high-temperature environments. The available base material options include: 

- SS316 (Stainless Steel 316) 

- SS321 (Stainless Steel 321) 

- Inconel 718 

- Inconel 750 

All these materials are selected for their excellent high-temperature resistance, corrosion resistance, and mechanical strength—critical properties for maintaining seal integrity over long periods. 

Long-Lifespan Advantage 

Unlike non-metallic seals, the Gas-Filled Metal O-Ring Seal is a **long-lifespan sealing component** that avoids common failure modes of non-metallic alternatives. It does not malfunction due to environmental incompatibility, outgassing (the release of trapped gases under heat), or material aging. This durability ensures consistent performance throughout its service life, reducing maintenance frequency and replacement costs for end-users.