200A protective nozzle

The 200A protective nozzle is a key vulnerable component on the argon arc welding gun. It is installed on the welding gun and its core function is to form and guide a protective gas (such as argon) to stably cover the welding pool, tungsten electrode, and high temperature area, effectively isolating air, preventing oxidation and nitriding, and thus confirming that the weld seam is aesthetically pleasing and meets quality standards.

The symbol "200A" usually represents the recommended welding current range for this protective nozzle, which means it is very suitable for stable operation in medium power welding environments with large currents of around 200 amperes.

Core functions and features

Excellent gas protection

The internal cavity of the protective nozzle is designed to allow argon gas to flow out uniformly in laminar flow, forming a stable gas hood. This air cover is the key to protecting the weld metal from air pollution, directly determining the quality of welding.

Excellent high temperature resistance (based on actual reports)

Made of high-purity ceramic material, it can withstand the high temperature generated by the arc during welding and the radiation heat of the tungsten electrode, and is not easily softened, melted or deformed, confirming its structural integrity and service life in high-temperature environments.

Wide applicability

As a standard accessory, the 200A protective nozzle is compatible with various models of air-cooled argon arc welding guns (such as QQ series, WP series, etc.). It is widely used in TIG welding of stainless steel, carbon steel, aluminum alloy and other materials, and is a common consumable in welding workshops and workbenches.

Diverse specifications and sizes

In addition to the current rating, the protective nozzle also has different inner diameter sizes and thread specifications to meet different welding process requirements:

Large inner diameter: Provides a wider gas coverage range, suitable for welding materials with high gas protection requirements (such as titanium alloys) or large-sized tungsten electrodes.

Small inner diameter: Gas is more concentrated, allowing for better penetration into narrow spaces for welding and providing more accurate protection.

economical and practical

As a consumable, the 200A protective nozzle has a high cost-effectiveness. It is reasonably priced and easy to replace. When there is damage, cracking, or internal contamination, it can be quickly replaced to immediately restore the welding gun to its optimal working condition.

Precautions for use

Do not overtighten during installation, otherwise the ceramic threads may be damaged.

During the welding process, collision with the workpiece or tungsten electrode should be avoided to prevent cracking.

If the inner wall of the protective nozzle is contaminated due to splashing, it should be cleaned or replaced in a timely manner to avoid interfering with the airflow and affecting the protective effect.