Needle valve
A needle valve is a type of valve having a small port and a threade needle-shaped plunger. It allows precise regulation of flow, although it is generally only . Parker Autoclave's 20DV Series diverter valves are built to operate safely and reliably up to 20psi (13bar).
This compact valve is used to divert flow from . Bar Stock, Screwed Bonnet Needle Valves for Sour Gas Service. Hy-Lok needle valves offer secure, leak-free connections and provide the lowest overall cost of any instrument needle valve used in the market today. Like all industrial valves, needle valves are used to control flow.

They are similar in construction to globe valves, but are most often used for the . Needle Valves - Parker Autoclave Engineers needle valves are designed for high pressure and temperature gas and liquid applications. Needle valves are a kind of control valve, which allows precise control of flow. Needle valves are used in several industries, including . Traduzione del vocabolo e dei suoi composti, e discussioni del forum.
Here is a video of a needle valve animation.