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Ace Glass, 8189-04, Stopcock High Vacuum, Easy-Action Plug, with Tef-Cap O-Ring, Size 0-4mm
High vacuum stopcock with Tef-Cap O-Ring seals that eliminate exposure to corrosive materials. for use to 3.5 Kg/cm2 internal pressure. An ultimate vacuum of 10-7 can be realized with the standard three seals. Smooth acting valve permits fine adjustment of opening. Front ring seal makes a positive closure against a precision-formed heavy glass seat. Hooded handle is permanently attached to PTFE plug and is therefore not bakeable. O-Rings are NOT replaceable. Reference marks on body aid in repetitive setting.
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