angle valve valves are made in which the flow can go in either direction between the two ports, when a valve is placed into a certain application, flow is often expected to go from one certain port on the upstream side of the valve, to the other port on the downstream side.
Technical specification
1.before assembling, all parts should be clean, no oil or grease. Remove all burrs and sharp edges
2.befoe connecting. Body cap male thread should be coated with sealing glue.
3.handle turn or close freely.