A PTFE sheet is not interchangeable by default

PTFE-based products are distinguished by their structure and formulation. Expanded PTFE, restructured PTFE, and modified sheets do not necessarily exhibit the same compressibility or creep resistance. For LATTYflon 84 L, consult the manufacturer data sheet alongside the candidate sheet to compare measured properties, temperature ratings, and chemical compatibility.

Pressure, temperature, and bolt loading

Catalogue service ratings serve as reference benchmarks, not as universal approvals for all pressure and temperature combinations. Low-bolt-load installations or those with delicate flange facings demand meticulous attention to minimum sealing stress and relaxation behaviour. Fluid characteristics, chemical concentrations, and thermal cycling can further narrow the selection.

Steps for technical documentation review

Identify the part number and thickness, followed by the process media and concentration, design pressure, temperature, flange class, and facing material. Review the material composition, manufacturer limitations, and any required industry approvals. A product from the same material family is a starting point for evaluation, not a certified drop-in replacement.

To compare construction designs: LATTYflon 94 L and LATTYflon 95. The type of fillers or reinforcements directly alters gasket performance. Belonging to the PTFE family does not guarantee operational equivalence.