Needle valve
Videos
A needle valve is a type of valve with a small port and a threaded, needle-shaped plunger. It allows precise regulation of flow, although it is generally only capable of relatively low flow rates.
Giffard steam water injector (B-needle valve).
A needle valve.
Electrically automated needle valve fluid on a fluid processing system.
Ball valve
Videos
A ball valve, also known as cone valve, is a flow control device which operates using a spherical ball with a hole through the middle. When the valve handle is turned, the ball rotates to align the bo
Needle valve
…Small, simple needle valves are often used as bleed valves in water-heating applications. Unlike a ball valve or valves with a rising stem, it is not easy to tell from examining the handle position whether the valve is open or closed. Ball valve…
Automated three-way ball valve
Ball for a titanium ball valve
Balls for alloy ball valves