b = raised face not included for ANSI Class 400 2500 See also:ANSI B16.5 Flange Dimensional Sizes 1/2 to 2 1/2 inches Table Chart Related:
POWER-SEAL 2 系列手动和自动高性能阀门，ANSI ASME类150和300说明书 POWER-SEAL Series P1S / P1F / P1M / P1H Manual and Automated High Performance Butterfly Valves ANSI/ASME Class 150 and 300 Featuring Actuators and Accessories