Project description
Needle Valves have a small port and a threaded, needle-shaped plunger allowing precise regulation of flow, although it is generally only capable of relatively low flow rates. It uses a tapered pin to gradually open a space for a fine control of flow. The flow can be controlled and regulated with the use of a spindle.
- A needle valve has a relatively small orifice with a long, tapered seat, and a needle-shaped plunger on the end of a screw, which exactly fits the seat.
- As the screw is turned and the plunger retracted, flow between the seat and the plunger is possible.
- However, until the plunger is completely retracted, the fluid flow is significantly impeded.
Since it takes many turns of the fine-threaded screw to retract the plunger, precise regulation of the flow rate is possible with needle valves.
