High vacuum three-way stopcock for use in combining materials in proportion or as a common feed distributed in proportion

With Tef-Cap O-Ring seals that eliminate exposure to corrosive materials. For use to 3.5 Kg/cm2 internal pressure. With variable openings from 0–3 mm to 0–5 mm. 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. Each easy action plug acts independently of the other and is connected to a common tubulation through a variable opening.