Advantages:
It has precise flow control and is suitable for applications that require precise control of fluid flow, such as the chemical and pharmaceutical industries. It has a high - pressure rating and can withstand high - pressure environments. It also has a compact design, which is suitable for applications with limited space.
Disadvantages:
The small opening of the valve seat limits the maximum flow rate, so it is not suitable for applications that require a large flow rate. It is sensitive to debris in the fluid. The small opening is easy to be blocked or damaged by debris and other contaminants, affecting its service life and performance. In addition, due to its precise design and high - pressure rating, the cost is relatively high.
Working Principle
The plunger of the needle valve has a tapered end. By rotating the handle, the plunger moves up and down, thereby changing the size of the opening between the tapered end and the valve seat, and then precisely controlling the flow rate of the fluid passing through the valve. When the plunger moves down, the tapered end gradually closes the orifice, reducing the flow rate; when the plunger moves up, the orifice opens, allowing more fluid to pass through
Applications
Industries: Water supply, wastewater, HVAC, irrigation, and general industrial systems.
Media: Water, oil, non-abrasive liquids, and high-pressure gases.
Pressure Range: Typically suitable for high pressure .
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