The importance of selecting the correct elastomeric seal for critical applications cannot be underestimated, but what sort of testing should be conducted on seals prior to selection? In this issue of the Global Sealing Express, we answer the most frequently asked questions about testing and elastomer seals:
Answer: It depends on the environment in which the seal operates. Generally, elastomers that have low chemical volume swell, minimal hardness change, and low compression set are good choices. If your process involves a high pressure environment and extrusion resistance is imperative, modulus test results should be your focus. Is there potential for Rapid Gas Decompression (RGD)? Look for test results that assess material suitability in that type of environment. Always feel free to contact your elastomer part supplier for advice and technical information.
Answer: Long-term testing often takes significant time and resources. Short-term testing is beneficial in that it provides a quick indication about materials that are not suitable for some services, and which materials should be researched further. With regard to long-term testing, there are some elastomer part suppliers that believe that long-term data is imperative when extending Mean Time Between Repair (MTBR) is a concern. Contacting your elastomer part supplier is the best way to determine what information is available.
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