999534 - ESAB 2-Inch Replacement Flow Gauge 0-40 CFH Steel Case

ESAB 999534 Industrial Flow Gauge Overview

The ESAB 999534 is a specialized replacement flow gauge designed for industrial gas regulators used in welding and cutting applications. This component is critical for the accurate monitoring of shielding gas flow rates, specifically calibrated in Cubic Feet per Hour (CFH). The gauge features a standard 2.00-inch diameter dial, making it compatible with a wide range of regulator bodies from ESAB and potentially other manufacturers that utilize standard NPT ports.

Constructed with a durable steel case (indicated by "STL" in the specification), this gauge is built to withstand the physical demands of workshop environments, offering superior resistance to impact and vibration compared to plastic-cased alternatives. The "LBM" designation refers to its Lower Back Mount configuration, where the threaded connection is located on the back of the casing, allowing the gauge to be mounted flush against a regulator body while facing the operator. The connection is typically a standard brass fitting designed to ensure a leak-proof seal when applied with appropriate thread sealant.

The scale ranges from 0 to 40 CFH, a range specifically optimized for MIG (GMAW) and TIG (GTAW) welding processes where typical flow rates fall between 15 and 35 CFH. The "BLU" attribute refers to the face design, which utilizes a blue background or blue zoning to provide high visual contrast, aiding operators in quickly verifying flow settings even in low-light conditions. This gauge does not measure tank pressure (PSI) but rather the dynamic flow of gas exiting the regulator, making it an essential component for the low-pressure side of the gas delivery system.

Maintenance and repair teams utilizing the ESAB 999534 can expect a direct-fit replacement for damaged or illegible gauges on existing equipment. Proper installation ensures compliance with welding procedure specifications (WPS) that mandate strict adherence to shielding gas flow rates to maintain weld quality and mechanical properties.