21939 - 2-Inch Replacement Regulator Gauge - 600 PSI LBM

Precision Monitoring for Industrial Gas Systems

The ESAB 21939 is a high-quality replacement pressure gauge designed to restore functionality to industrial gas regulators. Accurate pressure monitoring is critical for both safety and process quality in welding and cutting applications. This gauge features a calibrated scale ranging from 0 to 600 PSI, making it suitable for a variety of medium-pressure delivery applications, such as heavy-duty oxygen delivery, nitrogen purging, or other inert gas systems requiring delivery pressures exceeding standard low-pressure ranges.

Constructed with a robust ABS (Acrylonitrile Butadiene Styrene) plastic case, this unit is engineered to withstand the rigors of industrial environments. ABS offers superior resistance to impact and chemical corrosion compared to standard steel cases, ensuring the internal mechanism remains protected against accidental knocks and shop floor debris. The 2.00-inch dial diameter is the industry standard for regulator gauges, ensuring compatibility with a wide array of equipment from ESAB, Victor, and other major manufacturers.

The gauge utilizes a Lower Back Mount (LBM) connection, the standard configuration for face-forward regulator designs. The dial face is finished in a high-contrast white with distinct black markings, facilitating quick and accurate readings from a distance. This clarity helps operators maintain precise control over gas flow, directly influencing weld quality and operational safety. Whether used for maintenance, repair, or operations (MRO), this component meets the stringent reliability standards expected of ESAB equipment.

Key Technical Specifications:

• Pressure Range: 0-600 PSI (Pounds per Square Inch)


• Dial Size: 2.00 Inches nominal diameter


• Housing Material: Impact-resistant ABS Plastic


• Mounting Style: Lower Back Mount (LBM)


• Readability: High-contrast white background

Integrating this gauge into your inventory ensures you have the necessary spares to minimize downtime caused by damaged instrumentation. It is an essential component for any gas apparatus repair kit.