What are the differences between the sealing materials F, PPL, and H for pneumatic valves?
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What are the differences between the sealing materials F, PPL, and H for pneumatic valves? For example, in pneumatic ball valves, the sealing rings commonly used come in these materials – F, PPL, and H. What are their temperature resistance levels, and are they all corrosion-resistant? Solve
F, PPL, and H refer to fluoroplastic sealing respectively; the normal temperature resistance is 120 degrees, and with high-quality materials it can reach 150 degrees. PPL can withstand temperatures up to 300 degrees, while H features a hard alloy steel seal with a temperature resistance of 425 degrees. Fluoroplastic is the most corrosion-resistant material
Upstairs, it’s recommended to speak clearly! F refers to tetrafluoro (PTFE). PPL is said to be a modified version of PTFE; no information on it can be found online. H refers to alloy steel
Rigid seal and soft seal. F, PPL, tetrafluorine seal; H represents hard-sealed alloy steel