CGA320-2E - Miller CGA 320 CO2 Regulator Tailpiece with Filter

Precision CO2 Gas Connection Component

The Miller CGA320-2E Tailpiece, With Filter is a critical component designed for industrial gas regulation systems, specifically tailored for Carbon Dioxide (CO2) service. Manufactured to the highest OEM standards by Miller Electric, this tailpiece serves as the primary interface between the compressed gas cylinder valve and the pressure regulator. The CGA 320 standard is the designated connection for CO2 in the United States and Canada, requiring a specific flat-faced nipple geometry that this product provides with exceptional precision.

Constructed from high-grade brass, the tailpiece offers excellent durability and resistance to the physical stresses of repeated cylinder changes. Brass is the material of choice for these applications due to its non-sparking properties and resistance to deformation under torque. This ensures that the sealing surface remains intact over the lifespan of the regulator, minimizing the risk of hazardous gas leaks in the workplace.

Integrated Filtration System

One of the standout features of the CGA320-2E is its integrated filter. Gas cylinders, particularly those in industrial circulation, can occasionally contain particulate matter, rust, or debris. Without filtration, these contaminants can enter the high-pressure side of a regulator, leading to seat failure, diaphragm damage, or erratic flow readings. The built-in filter in this tailpiece acts as the first line of defense, trapping contaminants before they enter the sensitive internal mechanisms of the regulator or flowmeter. This simple addition significantly extends the service life of expensive gas control equipment.

Application and Compatibility

This tailpiece is designed for use with standard regulator nuts (sold separately) to form a complete CGA 320 inlet assembly. It is compatible with a wide range of Miller gas regulators and flowmeters used in MIG welding (GMAW) and Flux-Cored welding (FCAW) where CO2 is used as the shielding gas. It is also suitable for other industrial applications requiring regulated CO2 flow. Proper installation requires the use of a sealing washer (typically fiber or nylon) between the tailpiece face and the cylinder valve to ensure a gas-tight seal.