Construction and Measured Properties

The silica filler delivers a more rigid construction than SIGMA 500, but with a compressibility of only 7%. According to Flexitallic testing, it exhibits 7% compressibility, 44% recovery, and a density of 2.2 g/cm³. For a 1.5 mm thickness, the product brochure publishes an ASME m factor of 1.4, a gasket seating stress y of 16 MPa, and an EN 13555 Qmin/0.01 of 34 MPa. ASTM F38 creep relaxation is 35%. These parameters are derived from specific test methods and do not constitute universal installation criteria.

Applications and Service Conditions

The manufacturer specifies suitability for strong acids—excluding hydrofluoric acid—as well as oxygen and peroxide services within the scope of its qualifications. For HF service, 511 is explicitly excluded. The technical documentation rates service up to 260°C and maximum pressures of 85 bar at 1.5 mm, 80 bar at 2 mm, and 75 bar at 3 mm. These upper limits must never be combined without consulting the P/T rating chart.

Comparing Materials Without Assuming Direct Equivalence

Compare with GYLON 3500 and TEALON TF 1590, which also feature silica fillers. Chemical compatibility, certifications, and required bolt loads are not automatically interchangeable. To prepare an engineering evaluation, please specify the media, concentration, flange class, available bolt load, and required thickness.

Additional datasheets to review: Garlock GYLON 3500 and TEADIT TEALON TF 1590. These are material construction comparisons.