Corrosion-resistant dry running seal with “PTFE bellows”. Unlike double-seal types, it can directly seal gas in cylinders, so a sealing liquid is not required.
The parts that come in contact with gas are a PTFE bellows and ceramic stationary ring. Since metallic parts do not contact gas in the cylinder, this seal provides excellent corrosion resistance, and is effective towards reducing contamination. The sliding material can be selected to accommodate specifications.