Specialty Gas Distribution Equipment for Northern Illinois

Specialty gases are effective only insofar as the devices tasked to propagate them are effective. The purity and precision these gases are known for can be lessened without the necessary pressure and flow control and absent the provisions to monitor gas consumption.

Though the general understanding is that compressed gases, because of their nature, are conveyed in high-pressure gas cylinders, regulating that pressure in typical use is routinely an afterthought. You can count on there being marked distinctions between cylinder regulators created for oxy-fuel cutting and welding, general purge gas applications, and specialty gas use.

The PurityPlus® gas pressure-reducing regulators and flowmeters sold by Weldstar Specialty Gases deliver a level of quality in materials, design, and assembly that sets them apart from standard industrial gas equipment. Though higher priced, this equipment typically carries a value that goes well beyond its price. PurityPlus® regulators, mind you, most often have diaphragms made of stainless steel rather than rubber. Rubber diaphragms have a natural tendency to absorb moisture and impurities, then off-gas the contaminants as the cylinder supply pressure dips. This can be very detrimental to proper carrier gas flow and instrument response.

No less annoying is the problem of crawl. As the pressure in a gas cylinder is lowered, the pressure on the diaphragm is also reduced, and the outlet pressure can go up. To offset this action and tamp down its effects, it is strongly recommended that a two-stage PurityPlus® regulator be employed. The manufacturer presets the first-stage pressure reduction, typically in the range of 300-500 psig, while the user is allowed to  control the final outlet pressure in the second stage. Setting an intermediate pressure dampens the crawl effect by the second stage so  it’s virtually gone until the cylinder pressure falls below 150-200 psig.

For comparative purposes, look at an industrial gas single-stage regulator. With the single-stage design, the single diaphragm experiences a uninterrupted lowering of supply pressure in association with a relaxed but nonstop increase in outlet pressure that might change as much as 10-15 psig.

These are only a couple of examples illustrating why the right gas also needs the right gas equipment. Contact us online or get in touch with us, Weldstar Specialty Gases, at 708-627-1007. 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.