Specialty Gas Distribution Equipment for

Specialty gases can be effective only to the extent that the equipment used to distribute them is effective. The purity and precision these gases offer may well be lessened without the necessary pressure and flow control and absent the means to scrutinize gas usage.

Though few would contest that compressed gases, given their nature,should be delivered in high-pressure gas cylinders, managing that pressure in standard use is oftentimes treated as a matter of secondary importance. One must contend with many differences between cylinder regulators created for oxy-fuel cutting and welding, typical purge gas applications, and specialty gas use.

The PurityPlus® gas pressure-reducing regulators and flowmeters carried by Arc3 Gases offer the exceptional quality in materials, design, and assembly that differentiates them from standard industrial gas equipment. Though pricier, this equipment generally provides a value that far exceeds its price. PurityPlus® regulators, for example, most often use diaphragms made of stainless steel rather than rubber. Rubber diaphragms are prone to picking up moisture and impurities, then off-gas such contaminants as the cylinder supply pressure falls. This can wreak havoc in carrier gas flow and instrument response.

No less troubling is the problem of crawl. As the pressure in a gas cylinder is made to drop, the pressure on the diaphragm is also lessened, and the outlet pressure can go up. To counterbalance this action and restrict its effects, it is strenuously recommended that a two-stage PurityPlus® regulator be applied. The manufacturer presets the first-stage pressure reduction, typically between 300-500 psig, while the user is allowed to  monitor the final outlet pressure in the second stage. Setting an intermediate pressure puts dampers on the crawl effect by the second stage so  it’s virtually a done deal until the cylinder pressure goes below 150-200 psig.

Its worth comparing this, now, to an industrial gas single-stage regulator. As a result of the single-stage design, the single diaphragm sees a continuous lessening of supply pressure along with a gradual but uninterrupted rise in outlet pressure that might fluctuate as much as 10-15 psig.

These are but a couple of examples that show clearly why the right gas also demands the right gas equipment. Contact us online or phone us, Arc3 Gases, at (910) 892-4016. We not only have the right gases and the right equipment with the right options for you, but we also have the right answers to any question you might have about specialty gas control.