In general, Expanded PTFE gaskets can also be used as sealing solutions in various types of industrial applications. These gaskets are commonly utilized across the industries because of high chemical resistance, flexibility and the durability. However, if you are in the food and beverage industry, the petrochemical industry, the pharmaceuticals industry or any other industry that may require robust sealing solutions, it is imperative to know how to select the best Expanded PTFE gaskets.
We will focus on important aspects that you should consider if you are to purchase the best Expanded PTFE gaskets for your particular application in this comprehensive guide.
What are expanded PTFE gaskets?
The Expanded Polytetrafluoroethylene (ePTFE) gaskets are a type of gaskets that are made from expanded PTFE material. PTFE is a fluorine plastic that is used in a wide range of applications primarily due to its chemical inertness and non-stick surface. During the expansion process, the PTFE develops a microporous formation that greatly improves its flexibility, conformability, and sealing properties.
ePTFE gaskets are preferred for use in most of the circumstances where standard gaskets may fail through chemical attack, high temperature or mechanical stress. The properties that set them apart make them ideal for sealing applications across many industries.
Advantages of Using Expanded PTFE Gaskets
Now, it cannot be emphasised enough why ePTFE gaskets are recommended in diverse industries before we proceed with the selection criteria. Here are the main benefits:
The chemical compatibility of the expanded PTFE gaskets is excellent and it is not affected by most of the commonly used acids, alkalis, solvents, and corrosive agents. This makes them suitable to be used in chemical works, laboratories, and other facilities that use aggressive chemicals.
Sealing members produced from ePTFE gaskets can be used in a wide temperature range, commonly, from a minimum of -268°C (-450°F) to a maximum of 260°C (500°F). Their tolerance of temperature changes makes them suitable for low-temperature use and high-temperature use.
Due to the non-stick characteristics of the PTFE, the gaskets would not stick to the sealing surfaces. In this case, this property is valuable especially where there is often the need to change or service the gasket frequently.
Gaskets made from expanded PTFE are very elastic and will easily fold to fit around uneven shape surfaces. This provides a secure and firm closure, which is rather important in vigorous conditions.
Some aspects of ePTFE gaskets’ properties include low creep and cold flow, which implies that they are able to retain their initial shape and seal effectively over time in response to changes in pressure and temperature.
For instance, in the pharmaceutical and food industries, the gasket material cannot contribute to the contamination of the products that are being processed hence the suitability of ePTFE gaskets. This makes them a popular choice for applications where cleanliness is mandatory such as the food industry.