Specialty Gas Distribution Equipment for Minneapolis

Specialty gases are effective only to the extent that the equipment used to distribute them is effective. The purity and precision these gases are known for can be undermined should they not be supported by the necessary pressure and flow control and without the provisions to verify gas use.

Since few would contest that compressed gases, by virtue of their general properties, ought to be conveyed in high-pressure gas cylinders, regulating that pressure in conventional use is routinely treated as a matter of secondary importance. The truth is, there are significant distinctions between cylinder regulators intended for oxy-fuel cutting and welding, the usual purge gas applications, and specialty gas use.

The PurityPlus® gas pressure-reducing regulators and flowmeters you’ll get from Toll Company offer the kind of quality in materials, design, and assembly that sets them apart from regular industrial gas equipment. Though more expensive, this equipment usually has a value that far surpasses its price. PurityPlus® regulators, mind you, most often have diaphragms made of stainless steel as opposed to rubber. Rubber diaphragms tend to soak up moisture and impurities, then off-gas these contaminants as the cylinder supply pressure drops. This can greatly alter carrier gas flow and instrument response.

No less annoying is the problem of crawl. As the pressure in a gas cylinder is made to fall, the pressure on the diaphragm is also reduced, and the outlet pressure can go up. To compensate for this action and limit its effects, it is seriously advised that a two-stage PurityPlus® regulator be utilized. The manufacturer presets the first-stage pressure reduction, normally in the range of 300-500 psig, leaving the user to  control the ultimate outlet pressure in the second stage. Setting an intermediate pressure puts dampers on the crawl effect by the second stage to ensure that  it’s nearly gone 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 undergoes a continuous lowering of supply pressure along with an unhurried but unbroken rise in outlet pressure that could vacillate as much as 10-15 psig.

These are only a couple of examples that show clearly why the right gas also demands the right gas equipment. Contact us online or get in touch with us, Toll Company, at 612-581-9889. As crucial as the right gases, equipment, and options are, we offer a great deal more than that. We also have the answers you need to questions about specialty gas control – when you need them.