Forged os & y Gate Valve 1.CE,ISO9001,API6D,CQC,PDO. 2 ... F5,F9,F11,F316,LF2 etc Forged os & y Gate ValveApplication standards:1. Design and manufacture conform to: API 602;2. ... ; F316; F316L; F321; LF2 etc.Forged os & y Gate Valve: CZTV could design and manufacture as your request.Update Date:2010 ... -8-26 4:14:07 Forged os &y Gate Valve