Top Entry Ball Valve OMB top entry ball valves Size ½” – 2” Class 600, 800 End connection Threaded (THR) & Butt weld (BW) Bonnet Bolted (BB) Material A350 LF2 & A182 F316 OMB: FT-600-F316L-THD, FT-600-F316L-THD-NACE, FT-600-F316L-316- THD, FT-600-LF2-316-DEVLON-THD