Specialty Gas Distribution Equipment for Portland

Specialty gases can be no more efficacious than the equipment used to distribute them. The purity and precision these gases provide stand a good chance of being tempered if not sustained by the required pressure and flow control and absent the wherewithal to identify gas usage.

While the general understanding is that compressed gases, given their general properties, are shipped in high-pressure gas cylinders, controlling that pressure in standard use is oftentimes considered only after the fact. There are many distinctions between cylinder regulators created for oxy-fuel cutting and welding, most purge gas applications, and specialty gas use.

The PurityPlus® gas pressure-reducing regulators and flowmeters we have for you at Cryo-Source present a high degree of quality in materials, design, and assembly that differentiates them from regular industrial gas equipment. Though higher priced, this equipment usually has a value that far exceeds its price. PurityPlus® regulators, for example, most often have diaphragms made of stainless steel rather than rubber. Rubber diaphragms are inclined to pick up moisture and impurities, then off-gas these contaminants as the cylinder supply pressure drops. This can seriously effect carrier gas flow and instrument response.

Equally disconcerting is the problem of crawl. As the pressure in a gas cylinder is lowered, the pressure on the diaphragm is also lessened, and the outlet pressure can go up. To counterbalance this action and limit its effects, it is unequivocally advised that a two-stage PurityPlus® regulator be employed. The manufacturer presets the first-stage pressure reduction, normally in the range of 300-500 psig, letting users  monitor the final outlet pressure in the second stage. Setting an intermediate pressure reduces the crawl effect by the second stage to ensure that  it’s nearly eliminated until the cylinder pressure comes down below 150-200 psig.

Now, by way of contrast, consider an industrial gas single-stage regulator. As a result of the single-stage design, the single diaphragm experiences a unbroken lessening of supply pressure in association with a leisurely but unbroken increase in outlet pressure that can waver as much as 10-15 psig.

These are but a couple of examples that illustrate why the right gas also demands the right gas equipment. Contact us online or call us, Cryo-Source, at 503-235-0168. 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.