What are needle valves used for?
Needle valves, sometimes referred to as plunger valves, are regulating valves and enable engineers to finely control and regulate water flow and pressure.
How does a brass needle valve work?
Needle valves can operate manually or automatically. Manually operated needle valves use the handwheel to control the distance between the plunger and the valve seat. When the handwheel is turned in one direction, the plunger is lifted to open the valve and allow fluid to pass through.
Do needle valves reduce pressure?
With automated needle valve systems, this is less of an issue. Needle valves, by their design, allow pressure to be added/relieved in very small increments. Needle valves are invaluable for many systems and machines, as they help to maintain these and prevent significant damage.
Are needle valves reliable?
Needle valves are used to accurately control flow rate, but can also be used as a reliable shut-off valve. Most commonly, needle valves are operated manually, but they can be motorized to allow for automation.
What kind of valve is a needle valve?
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.
Does a needle valve increase pressure?
Robust needle valves can handle pressure of up to 4,000 to 5,000 psi (275 up to 413 bar) at 100°F (38°C). When higher pressures are required, like for high pressure hydraulic applications, high performance valves are available that can handle up to 10000 psi (689 bar) pressure at 100°F (38°C).
Why are needle valves directional?
Pneumatic needle valves allow the user to control the flow of air in both directions within a pneumatic circuit. The bi-directional design allows metered air flow in one direction and free flow in the reverse direction. Most pneumatic needle valves have an arrow indicating the free flow direction.
Are needle valves directional?
Unlike a Flow Control, a Needle Valve is bi-directional, meaning it controls flow in both directions instead of only one direction. A finely threaded stem allows the gradual adjustment of the amount of controlled flow passing through the valve.
Are needle valves linear?
Needle valves are linear motion valves, these valves are used in instrument systems for throttling of small volumes. Needle valves have metal to metal seats, but because of the small size, they can be used for positive shut off.
What are the applications of brass needle valve 1/8 NPT?
Low pressure applications of the Brass Needle Valve 1/8 Npt include tasks such as when filling gas filled vacuum tubes or gas lasers or other similar devices. A key property of choosing Brass Needle Valve ¼ is that brass has excellent corrosion resistance properties.
How do you connect a needle valve to a gas cylinder?
Provide a connection for hose cocks, needle valves, and nozzles by attaching these flanges and turrets to your supply pipe. Mount these valves directly to cylinder ports, eliminating additional tubing between the cylinder and valve for better control than inline valves.
What is the maximum working pressure of a needle valve?
3,000 Max psi, 1/2″ Pipe, Brass, Inline Instrumentation Needle Valve – Style In-line Pipe Size (Inch) 1/2 Material Brass Maximum Working Pressure (psi) 3,000
What is a 45 degree valve used for?
These valves are for use with water, oil, air, and inert gas. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control. With 45° flared tube fittings, these valves form a tight seal on metal tubing.