500 NB Class 900 G3 series swing check valve 250 NB Class 900 PL series ball valve 80 NB Class 600 G3 series swing check valves 50 NB Class 600 PC series Ball valve with hydraulic actuators. 300 NB Class 900 Combination valves with special flanges Various ball made in house waiting for hard metal coatings 100 NB Class 600 PC series ball valve with hydraulic actuators 50 NB Class 600 PC series Ball valve with hydraulic actuators.