A regulator flowmeter delivers the gas at a fixed pressure to a variable orifice (valve), and a flowgauge uses variable pressure to deliver the gas to a fixed (drilled) orifice. While both are designed to regulate pressure and measure gas flow, they operate quite differently. The two main flow control devices are regulator flowmeters and flowgauge regulators. The ability to tell whether you’re producing a flowing condition.Should an inspector on a shipbuilding or military job see a flowmeter that is out of the recommended flow specification, the job can automatically fail inspection.Ĭhoosing between a flowmeter and a flowgauge depends on the type of work being done.įour considerations to keep in mind when choosing between a flowmeter and a flowgauge are: Some welders are tempted to increase gas flow if they are in windy conditions, believing they are providing better shielding, but doing so can immediately put a job out of specification. Using a regulator flowmeter or flowgauge regulator is essential for welding because it’s necessary to know the cubic feet per hour or litres per minute a gas is flowing to provide adequate shielding of the weld metal deposit, bead shape, and penetration and to properly align with your welding parameters. Regulator Flowmeter and Flowgauge Regulator Differences This offers employees a visual cue that’s easy to follow. It is also possible to find colour-coded adjusting knobs to ensure the correct regulator is selected for the specific gas or variant it is intended to be used with. Pressure gauges also have been designed to be easier to use for less experienced welders by colour-coding pressure levels to explain rule-of-thumb levels for cutting, heating, and welding. Some are designed to protect valves and gauges from potential damage should a cylinder be knocked over or in some other way interfered with. Regulators can seem like straightforward devices, but engineering developments have made recent iterations much more rugged than their predecessors. Some of these are the application or service function, total cost of ownership (TCO), source of supply (cylinder, pipeline), safety, and durability. There are several factors to consider when selecting a regulator. The reduction in pressure sets the gas at a usable pressure level for cutting, heating, and welding/brazing or flow rate for gas shielding in welding applications.Ī regulator is the ideal tool if you are using a gas for cutting and heating because pressure and volumetric flow exiting the orifice at the cutting or heating tip is what is most important in this scenario. Common modern regulators are either single or two stage and have pressure gauges (two or one) that measure the pressure from the source of supply and delivery pressure, or flow rate. They are produced with different capacities for pressure and volumetric flow, depending on the application and source of supply. Regulators are adjustable pressure reducers designed to operate automatically after an initial setting. This article discusses which device is best for what kind of job.Ī regulator essentially does one thing: It allows you to regulate the output pressure of the gas you’re using from the cylinder or pipeline. When managing your gases for cutting and welding or shielding, it’s important to know which type to use for the job: a regulator, a regulator flowmeter, or a flowgauge regulator. The size differences between the gauges especially helps with oxyfuel processes, in which the more critical delivery pressure gauge is larger and the cylinder pressure gauge is smaller. Next-generation regulators communicate information using colour-coding and graphics.
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