1000-0257 - Victor FM 155 Heavy Duty Argon/Helium Flowmeter (1/4 NPT Inlet)

Precision Gas Measurement for Industrial Applications

The Victor FM 155 Flowmeter (SKU: 1000-0257) is a heavy-duty gas measurement instrument designed specifically for the rigorous demands of industrial welding and laboratory environments. Engineered to monitor the flow of inert gases, specifically Argon and Helium, this unit provides critical control over shielding gas delivery in MIG and TIG welding processes. The device is calibrated to operate at an inlet pressure of 25 PSIG, ensuring consistent flow rates and minimizing the 'gas surge' often associated with higher pressure systems.

Technically, the FM 155 stands out due to its back-pressure compensation. This feature ensures that the flow reading remains accurate even if there are restrictions in the delivery line or torch, a common variable in complex piping or long-cable setups. The flow tube and outer cover are constructed from impact-resistant Lexan, a polycarbonate material chosen for its high durability and clarity. This design choice significantly reduces the risk of breakage compared to traditional glass tubes, making it ideal for severe applications. Furthermore, the cover tube incorporates an overpressure protection mechanism, adding a layer of safety for the operator.

The unit features a 1/4-inch NPT inlet connection, allowing for direct mounting to manifolds or compatible regulator bodies, and a standard 5/8-inch-18 RH(F) outlet for connecting standard inert gas hoses. With a flow range of 4-18 SCFH for Argon and 10-50 SCFH for Helium, the FM 155 covers the essential range required for precision arc welding, ensuring optimal weld pool protection without gas wastage.