http://www.jitaivalvegroups.co....m/api-602-forged-val 602 Forged Valves in stock Introduction Forged check valves are reliable to prevent back flow in pipes with lowest water hammer. Features 1.Swing and lift type; 2.Bolted bonnet , pressure seal bonnet or welded bonnet; 3.Chrome or stellite hardfaced seat; 4.Low fugitive emission; 5.Full port and regular port available Major Specification Nominal size1/2"~4"(DN15~DN100锛?/p> Nominal pressureClass150~2500锛圥N10~PN420锛?/p> Standard:API 602,