Although the installation of ePTFE tape is relatively straightforward , several important factors must be considered when using π www . valve-world . net Valve World February 2025
SEALING
Figure 2 : Instructions on how to install 25BI with shimming . 1
Figure 3 .
Figure 4 .
Multi-directional ePTFE tape Multi-directional ePTFE tape offers excellent strength and stability because it is expanded in two directions . This bi-axial orientation provides more consistent compression without a significant change in width , making it ideal for applications where dimensional stability is crucial . For example , Teadit ’ s 25BI tape has a unique manufacturing process that results in high tensile strength in both the longitudinal and cross directions . As a result , the tape ’ s width does not change significantly under compression , see Figure 1 . This is in stark contrast to many expanded PTFE tapes . Glass-lined piping and equipment often have warped surfaces with significant variations that need to be compensated for by the gasket . In these cases , multidirectional ePTFE tape is an excellent solution . Its ability to be layered ( shimming ) in specific areas of the flange allows it to accommodate variable warping and uneven surfaces , ensuring a reliable seal . Additionally , its resistance to creep at high temperatures makes it ideal for protecting the glass lining and maintaining an effective seal .
Customisation and versatility
One of the primary advantages of ePTFE tape is its versatility in accommodating a wide range of flange shapes and sizes . This reduces the necessity of maintaining an inventory of multiple pre-cut gasket sizes . A single roll of tape can be used for various dimensions and complex configurations . This adaptability is particularly valuable for maintenance engineers , where time constraints are often critical during repairs . For flanges of dynamic applications , such as pumps , where internal components can pose challenges during installation , ePTFE tape provides a highly flexible sealing option . It can be applied without the need to dismantle intricate internal parts , thus significantly reducing downtime . While ePTFE gasket-tape ’ s unique flexibility greatly enhances its usability in various applications , understanding the installation techniques — particularly the distinctions between mono-axial and multi-directional tape — is also essential for achieving optimal sealing performance .
Installation and strength considerations
Although the installation of ePTFE tape is relatively straightforward , several important factors must be considered when using π www . valve-world . net Valve World February 2025
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