Valve S63, Vacuum, PTFE-Plug, protected O-ring, low hold up

With two 9mm O.D. side arms bent to minimize hold up of liquids. Viton® O-ring on PTFE shaft is protected with precision Teflon® wiper. The plug has a machined-in integral PTFE tip O-ring to make the primary seal. This design provides for an excellent vacuum tight seal without exposing any material other than Teflon® to chemicals.