Definition of Welded Needle Valve

A welded needle valve is a globe valve that controls the on-off of fluid by the valve stem driving the valve needle to lift. The valve is forged from high-quality stainless steel or heat-resistant alloy steel, and its sealing surface adopts hard alloy overlay welding technology. It features fire and explosion resistance, high pressure and high temperature resistance, and is suitable for harsh working conditions such as petroleum, chemical industry, and thermal power plants. With a compact structure and excellent sealing performance, it provides two connection methods: butt weld and socket weld, complying with multiple industrial standards and specifications.

Technical Parameters of Welded Needle Valve

Product Name: Socket Weld Needle Valve, Butt Weld Needle Valve

Port Connection: Welded Type

Structure Type: High Pressure

Size Range: DN6 - DN25

Valve Body Material: SS304, SS316, SS316L, 2205

Temperature Range: High temperature ≥450℃; Medium temperature -40℃ ~ 450℃; Normal temperature -40℃ ~ +120℃

Pressure Class: 1000Psi - 20000Psi

Sealing Material: POM, PEEK, FKM, NBR

Structural Features of Welded Needle Valve

Adopts hard alloy overlay welding for the sealing surface, ensuring long-term leak-free operation;

The streamlined valve needle design improves the precision of medium control [1];

The outer surface is treated with anodization, featuring both corrosion resistance and aesthetic appearance.

Application Fields of Welded Needle Valve

It is mainly deployed in the main steam systems of thermal power plants and high-temperature oil product transmission pipelines in refining and chemical plants, and is particularly suitable for high-pressure pipelines that require frequent opening and closing.