Frontier manual and pneumatic vacuum angle valves are designed for general use in vacuum systems, processes and exhaust applications. They are particularly well suited for vacuum isolation or control under rigorous installation conditions. The angle valves are equipped with vacuum bellows and are highly effective in high vacuum environments. Frontier manual and pneumatic angle valves are offered with DN25, DN40, DN63, DN80, and DN100 flanges, with a leak rate of 1.3 x 10-11 Pa m3 s-1, and operate in a pressure range of 1 x 10-6 Pa – 1.2 x 10(5) Pa.