Our vacuum ball valves are designed to have a low leak rate, typically on the order of 1x10-9 std. cc/sec. Helium. These ball valves have a NW-40 vacuum flange for connection to the vacuum system, are manually operated, and made of stainless steel.
NW Style Clamps, Centering Rings, Hose - Vacuum NW40 to 3/4 Tube 304 S.S. QUICK-NW40-3/419.3 44.5 55 $70.00 VCR-4 vacuum sensors into any system using NW style flanges. Other special connections can be provided. Two (2) ports are standard with up NW 4-Way Crosses NW Tees NW Unequal Tees NW16 Flange 304 S.S. Material NW-16-45-ELBOW Part No. 23 A $40.