... eye or casing test.It is connected with the well head, with a bar dropper assembly with it.It could circulate open flow.Well ... including the bar dropper assembly, plug valve,active part, active elbow, etc. We now have different types, such as single wing, double ... from customer at home and abroad. Now, we can provide with Gate Valve, Choke Valve, Check Valve, Retaining Valve, Shutoff Valve, High ...