Vacuum ValvesVented Ball Valves with Locking Handles Model No.: BVV-12F Part No. Pipe Thread AHex in. (mm) Bin. (mm) Cin. (mm) Ein. (mm) Hin. (mm) Lin. (mm) DFlow in. (mm) BVV-12F 1/2″ NPT 1.06 (27.7) 2.20 (55.9) 1.23 (31.2) 3.91 (99.3) 2.58 (65.5) 5.00 (127.0) 0.500 (12.7)