DIMENSIONAL DRAWINGS Swing check bolted bonnet Y-type piston check bolted bonnet H H L ø P L øP Piston check bolted bonnet Ball check bolted bonnet H L ø P H L ø P ø P L2 H1 ASME B16.25 - Refer to drawing for dimensions Butt Weld Piston check welded bonnet H L ø P L ø P H Piston check Y-type welded bonnet AUSTRALIAN PIPELINE VALVE 17 CHECK VALVES - SCREWED & WELD END SCREWED & WELD END CHECK VALVES 800 TO 2690 CLASS