253B-1-40-1 Exhaust Throttle Valve
Solar Cell Test Systems; Optical Meters; Benchtop Power & Energy; Handheld Power & Energy; ... The 253B-1-40-1 Exhaust Throttle Valve regulates the removal of gas from a processing system. It features a 1.270 inch (32 mm) nominal inside diameter and a size NW40 ISO-KF Flange. ... Helium Leak Rate. 1 x 10-8 scc/sec . Closed Leakage. 10-7 (Torr l ...