As is well known, three fundamental factors are involved in a flanged joint: the sealing gasket material itself, the hardware and the flanges. If the tightening torque of the bolts is insufficient, even if the flange faces are in perfect condition and the material is PTFE, the process fluid will leak through the flanged joint.
When the flanged joint is opened, the first thing to inspect is the PTFE gasket, which will be in perfect condition if it has been used. Restructured PTFE Gylon®. If the flange faces have the proper surface finish and the bolts are new, the next point to evaluate is the tightness of the bolts.
With the 3rd generation of Garlock's restructured PTFE, Gylon® EPIX, applying the same tightening torque, the risk of leakage is prevented.
Index
Advantages of Gylon® Epix vs. its predecessor
- - Composition The new material Gylon® EPIX is a surface of Gylon® to which a relief in the form of a hexagonal mesh (patented) has been added.
- - Higher sealing pressure.The hexagonal mesh relief allows to reduce the contact surface with the flange faces. Thus, using the same tightening torque on the bolts, The sealing pressure of the joint is increased, improving the sealability of the joint.
- - Better level of watertightness. Revealing paper shows the sealability of a conventional PTFE joint and of the same board in Gylon® EPIX. In the image on the left, certain discolored areas appear because the pressure on the developer paper has not been uniform. Under certain circumstances, this can lead to leakage. However, in the image on the right (Gylon® EPIX) it is found that the pressure is homogeneous over the entire surface of the developing paper, significantly improving the seal tightness.
- - Thickness and format - Gylon® EPIX is manufactured in a single thickness (2.4 mm) offering the sealability of a lower thickness (1.6 mm) and the compressibility of a higher thickness (3.2 mm) in large diameter joints. The format is in sheets of 1,500 x 1,500 mm or as a cut joint.
Types of Gylon® Epix for flat gaskets
The formulation of Gylon® EPIX is the same as that of Gylon® and; therefore, the service temperature range is the same. On the other hand, the hexagonal mesh relief allows up to a pressure of 52 bar.
- - Gylon® Epix Standard Style 3501: Restructured PTFE with high-performance silica filler, designed to for strong acids, solvents, hydrocarbons, steam and other aggressive fluids. It is brown in color.
- - Gylon® Epix Blue Style 3504: PTFE restructured with high-performance aluminosilicate microspheres, designed for contacts with acids of moderate concentration, bases, hydrocarbons, steam and refrigerants, among other fluids.. Its tone is blue.
- - Gylon® Epix White Style 3510: Restructured PTFE with high performance barium sulfate filler, designed for for cryogenics and extremely aggressive chemicals such as hydrofluoric acid, aluminum fluoride, bleaches, chlorine, caustic soda, steam, etc... Additionally, this material inhibits unwanted polymerization of monomers ( pop-corning). It is pale gray in color.
Gylon® Epix flat gasket certifications
Gylon's new formulation® EPIX for flat gaskets has the following certifications:
- - FDA
- - USP VI
- - USP VI
- - USP VI
- - RoHS 3
- - TA Luft
- - Blow-out proof
- - REACH and
- - DIN EN 13555.
In addition, the range of materials Gylon® Epix contains no additives of animal origin, and therefore complies with ADI Free TSE/BSE certifications.
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