... .CE,ISO9001,API6D,CQC,PDO 2.Forged Check Valve Size 1/4"~2" 3.Class 800~1500LB A105,F5, ... ; F316; F316L; F321; LF2 etc.Forged Check valve: SpecificationsCast Steel Ball Valve 1.Design:BS5351,ANSI B16.34,API6D 2.Pressure ... :150-600LB 3.Size:1/2"-12" 4. ... API 598, API 6DFire-safe Design: API 607/6FA Size:1/4"-4" Material:304(CF8,1.4301)/ 316(CF8M ...