Specialty Gas Distribution Equipment for Fresno

Specialty gases are effective only in the context of how effective the apparatus is that’s employed to disseminate them. The purity and precision these gases are known for may well be diluted if not sustained by sufficient pressure and flow control and without the means to corroborate gas consumption.

Though the standard is that compressed gases, given their nature, are shipped in high-pressure gas cylinders, managing that pressure in conventional use is often considered only after the fact. The truth is, there are considerable distinctions between cylinder regulators intended for oxy-fuel cutting and welding, most purge gas applications, and specialty gas use.

The PurityPlus® gas pressure-reducing regulators and flowmeters available from Fresno Oxygen & Welding Supplies/Barnes Welding Supply present a level of quality in materials, design, and assembly that distinguishes them from common industrial gas equipment. While pricier, this equipment commonly carries a value that goes well beyond its price. PurityPlus® regulators, for example, generally use diaphragms made of stainless steel, not rubber. Rubber diaphragms have a propensity to pick up moisture and impurities, then off-gas such contaminants as the cylinder supply pressure dips. This can greatly alter carrier gas flow and instrument response.

Equally disconcerting is the matter of crawl. As the pressure in a gas cylinder is made to fall, the pressure on the diaphragm is also lessened, and the outlet pressure can go up. To compensate for this action and curb its effects, it is strongly advised that a two-stage PurityPlus® regulator be utilized. The manufacturer presets the first-stage pressure reduction, generally around 300-500 psig, while the user is allowed to  monitor the ultimate outlet pressure in the second stage. Setting an intermediate pressure dampens the crawl effect by the second stage to ensure that  it’s almost non-existent 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 uninterrupted reduction in supply pressure accompanied by an unhurried but nonstop rise in outlet pressure that may 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, Fresno Oxygen & Welding Supplies/Barnes Welding Supply, at 559-341-4456. As important as the right gases, equipment, and options are, we give you considerably more than that. We also have the answers you need to questions about specialty gas control – when you need them.