How to find the right Gaskets AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Gaskets
- Material vs. media and temperature
- Match the gasket material to the fluid and to the peak operating temperature, not the average. Use EPDM for water and steam, not oil. Use nitrile (NBR) for oils and fuels. Use PTFE for aggressive chemicals. Use flexible graphite for high heat. Chemical incompatibility and heat cause most gasket failures, and the wrong rubber swells or hardens within weeks.
- Flange standard and face type
- Cut or buy to the flange standard (ASME B16.5/B16.47, EN 1092) and the face type. Full-face gaskets go on flat-face flanges. Ring (inside-bolt-circle) gaskets go on raised-face flanges. A full-face gasket on a raised-face flange, or the reverse, leaks or cracks the flange.
- Thickness
- Use the thinnest gasket that the flange flatness and surface finish allow. On smooth, flat flanges, 1/16 in is typical. Thinner gaskets resist blowout and creep relaxation better, while thicker ones only help on warped or rough faces.
- Bolt load and creep
- Soft materials such as rubber and unfilled PTFE need low bolt load but cold-flow over time. Choose filled PTFE or fiber sheet where bolts cannot be retorqued. Loss of bolt preload through creep relaxation is the classic slow leak.
- Potable water or food contact
- Require a stated listing (for example NSF/ANSI 61 for drinking water, or FDA-compliant compounds) when the gasket touches drinking water or food. General-purpose rubber compounds can leach additives.
Brands that matter
- Garlock: Industrial benchmark for compressed fiber sheet (Blue-Gard) and filled PTFE (GYLON).
- Klinger: Long-established fiber and graphite sheet gaskets, strong in steam service.
- Teadit: Broad range of PTFE, fiber and graphite sealing products.
- Flexitallic: Spiral-wound and high-temperature gaskets for process piping.
- W. L. Gore: Expanded PTFE gaskets and joint sealant tapes.
- Fel-Pro: Automotive gaskets and gasket sheet material.
What to avoid
- Unbranded rubber sheet with no stated polymer, which may be filler-heavy SBR that hardens and cracks.
- Reusing a compressed gasket after the joint has been opened.
- EPDM in contact with oil, fuel or hydraulic fluid.
- Adding gasket sealant or grease to a fiber or PTFE gasket unless the maker says to.
Questions
Full-face or ring gasket?
Use full-face if the flange faces are flat and the bolts pass through the gasket. Use a ring gasket that sits inside the bolts if the flange has a raised sealing face.
Can I cut my own gaskets from sheet?
Yes, for low and moderate pressure. Use a sharp punch or knife and transfer the bolt holes from the flange itself. Buy pre-cut gaskets for high-pressure or code service.