Needle valves are a type of valves
with a tiny port and a threaded plunger that resembles a needle. The function of a needle valve is to ensure relatively low rates of flow by regulating the amount of flow with high precision. The needle-shaped valve plunger is a tapered pin that gradually opens to create some space for the fluid to flow by using a spindle. The small hole with the long tapered base fits the needle-like plunger with high precision compatibility. When the screw is turned to retract the plunger, the liquids flows, and the flow increases as the plunger is continuously retracted. The number of tapers on the plunger and port is high, which requires many turns to retract the plunger completely, and this increases the precision of liquid flow control. Needle valves are applied in vacuum systems to regulate gas flow with high precision at low pressures. Other uses of needle valves include flow meters and water heating bleed valves. Get the best selection of needle valves from MRO Supply. We have a wide range of needle valves and other types of valves to suit various applications.