When selecting a Garlock LINK-SEAL, two main factors influence performance and longevity: choosing the right model based on the pipe-to-wall gap and selecting the right material for the environment. Garlock offers LINK-SEALs in sizes from LS-200 to LS-600 and beyond, each suited to different pipe sizes and conditions.
Note: If your size or configuration isn’t listed, Maddock’s team can help. We frequently work with customers to configure standard or custom assemblies, including uncommon sizes or setups. Our team can develop a custom solution to ensure you get the seal you need – even if it’s not a typical off-the-shelf combo.
Carbon Steel vs. Stainless Steel Hardware
Carbon Steel is coated for corrosion resistance and is suitable for indoor, dry environments where rust isn’t a concern. It’s a cost-effective choice for mechanical rooms, telecom closets, and interior utility penetrations.
Stainless Steel (316) offers superior protection in wet, humid, or chemical-prone environments. It’s often preferred in basements, water treatment facilities, and on rooftops, where long-term corrosion resistance is crucial. For facilities built to a 50-year design life, stainless has become the default.
Model Overview: LS-200 to LS-600
- LS-200 & 275: best for small gaps and fragile piping with a low compression force, making it suitable for delicate installations
- LS-300, 315, 325, 340 & 360: a general-purpose seal with options for chemical resistance (e.g., nitrile or EPDM) that is most popular for 2″ and 4″ conduit runs – especially in underground electrical applications
- LS-400, 410, 425 & 475: ideal for large diameter pipes and larger wall openings and frequently used in utility and infrastructure penetrations
- LS-500, 525 & 575: a heavy-duty option for high-load or thick-wall penetrations that is used in industrial and municipal infrastructure
- LS-615/650: the largest standard model, balancing size and versatility for standard utility and water/gas-tight sealing needs; it’s also popular for 16″ and larger pipe sizes.
Quick Comparison Table:
| Model | Best Application |
|---|---|
| LS-200 & 275 | Small annular spaces, low compression needs |
| LS-300, 315, 325, 340 & 360 | 2″ and 4″ conduit runs, general utility sealing |
| LS-400, 410, 425 & 475 | Larger pipes and bigger wall penetrations |
| LS-500, 525 & 575 | Higher loads, industrial or thick-wall use |
| LS-615/650 | Most common for standard large-pipe applications |
Choosing the right combination ensures performance, reliability, and peace of mind. And if your project falls outside the norm, the Maddock team can help configure a solution that fits.
