Specialty Gas Distribution Equipment for St. Louis

Specialty gases really aren’t any more usable than the devices employed to disperse them. The purity and precision these gases deliver may well be tempered without the required pressure and flow control and lacking the means to corroborate gas usage.

With the general understanding being that compressed gases, on account of their general characteristics, ought to be shipped in high-pressure gas cylinders, regulating that pressure in conventional use is oftentimes an afterthought. One must contend with considerable differences between cylinder regulators intended for oxy-fuel cutting and welding, typical purge gas applications, and specialty gas use.

The PurityPlus® gas pressure-reducing regulators and flowmeters available from Cee Kay Supply, Inc. deliver the kind of quality in materials, design, and assembly that distinguishes 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 use 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 slides downward. This can have a negative effect on carrier gas flow and instrument response.

Just as annoying is the issue 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 higher. To counterbalance 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, generally in the range of 300-500 psig, leaving the user to  control the final 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 almost done away with until the cylinder pressure comes down below 150-200 psig.

Now, by way of contrast, consider an industrial gas single-stage regulator. Because of the single-stage design, the single diaphragm sees a unbroken lessening of supply pressure in association with a gradual but continuous increase in outlet pressure that may vacillate as much as 10-15 psig.

These are but a couple of examples that illustrate why the right gas also necessitates the right gas equipment. Contact us online or get in touch with us, Cee Kay Supply, Inc., at 314.644.3500. 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.