HTC manufactures UHV valves and HV valves, Vacuum Valve Series: Angle Valve ,Z-Inline Valve ,Y-Inline Valve, Stainless steel valve. -- Polished 304 stainless steel body. -- 3/4~2inch port ODs. -- Bakeable to 150C(200C intermittently for CF flagne port). -- Metal Seal Bonnet:10-9 Torr vacuum rating KF and approximate 10-10 Torr vacuum rating CF flange