brass globe valve code: BT1001 size:1/4"-4" certificate: ISO9001 , ... : ISO228/1:2000 opening /closing tests:20000times . anti-oxygen glue applied to join body&bonnet suitable medium: water &non ... , brass ball, brass stem , steel handle .BOTE BALL VALVE are bottom lkoaded stem designed , this anti blow out stem ... with the internals of the valve when in the line , and the ball valve have a double seal with ...