PN 0.6MPa ~ 4.0MPa, working temperature 150 `c convex control flange PTFE envelope gaskets.
Teflon coating raw materials shall meet gb7136 ptfe sm031 of a product requirement.

Embedded layer is generally asbestos rubber gasket, its technical performance indicators should be consistent with the provisions of GB3985 in XB450. Need to have special requirements, other suitable materials may also be used.

Gasket diameter and location of limit deviations specified by the table, coating thickness Tolerance is 0.55mm, the total thickness of the gasket Tolerance is 0.10mm.

Cladding surface should be smooth, without warpage, uniform thickness and does not allow all holes and defects such as slag.

Gasket compression rate, rebound rate, should relaxation rate and seal leakage rate shall comply with the provisions of GB/T13404.