Cutaway Needle Valves
A needle valve has a small port and a threaded, needle-shaped plunger. It allows precise regulation of flow and is generally only used with relatively low flow rates.
As the screw is turned and the plunger retracts, flow between the seat and the plunger is possible, however, until the plunger is completely retracted the fluid flow is significantly reduced. Since it takes many turns of the fine-threaded screw to retract the plunger, precise regulation of flow rate is possible. The slow operation makes needle valves unsuitable for shut-off applications.
The CVA-NE series of cutaway needle valves uses new industrial needle valves that are cut away to clearly show the inlet, outlet, spindle, trim, gland seal and cap, allowing students to easily visualise valve operation and identify the main valve components.