Needle valves are linear motion valves, Which are used in instrument systems for throttling of small volumes. A needle valve is a manual valve that is used where continuous throttling is required for the flow regulation. We supply 6 kinds of needle valves, and they are Integrated Bonnet Needle Valve (BN and BNH Series), Integral Forged Needle Valve (FN Series), Forged Needle Valve(FNH Series ) , Union Bonnet Needle Valve (UBN and UBNH Series), Rising Plug Valve (RP and RPG Series), Gauge Valves (GVB and GVR Series)