Definition - What does Needle Valve mean?
A Needle Valve is a type of valve that has a small port and a threaded needle shaped plunger. The purpose of the valve is to allow precise regulated flow; however, these valves are generally used in the applications involving relatively lower flow rates. The Needle Valve controls the flow in both directions and thus it is also known as a bi-directional flow control valve.
Petropedia explains Needle Valve
Needle valves are used in almost every industry where the flow rate is relatively at the lower sides. They are used for steam, oil, gas, air and chemical metering is required when the valve is used. The following is a list of the industries where these valves are predominantly used:
- Oil and gas in gas or liquid dispensation
- Power generation
- Instrumentation control
Needle valves are used when the flow of liquid or gas needs to be controlled and routed into delicate gauges for measurement and metering purposes. These valves are also used when the flow needs to be gradually stopped and where precise flow adjustments are necessary.
Below is the list of materials used for the manufacturing of needle valves:
- Stainless or alloy steels