What is the difference between a single-stage and a dual-stage regulator?

Single-stage regulators lower pressure in one step to produce pressure within a specified range. Regulators designed in this manner will show a slight variation in delivery pressure as the cylinder pressure falls during use. This is why single-stage regulators are most appropriate for applications where a constant outlet pressure is not urgent, where an operator can monitor and readjust pressure, or where inlet pressure is constant.

Dual-stage regulators provide the same function as single-stage regulators. But, in this case, the delivery pressure holds steady as cylinder pressure decreases. Greater accuracy in pressure control is kept because the pressure reduction is brought about in two steps. Dual-stage regulators are recommended for applications requiring a constant outlet pressure throughout the life of a gas cylinder.

Access our catalog for more information on gas regulators or reach us at 716-630-9353 or balbro@thehaunedge.com.

What does PurityPlus Certification Mean?

PurityPlus® producers are an organization of Independently Owned Specialty Gas producers in North America working through the Independent Welding Distributors Cooperative. A primary part of the PurityPlus program is it's consistent Standard Operating and Quality Assurance Procedures that all producers must satisfy. Our exhaustive SOP/QA program was originally designed, tested and coordinated by AsteRisk, LLC., a gas-industry consulting company organized by a long-term employee of Union Carbide/Praxair. PurityPlus® continues to utilize AsteRisk for its third-party auditing, as well as operations and safety consulting. http://www.asteriskllc.com/ Elemental to the program are a sequence of levels or tiers that define the capabilities of each member. These tiers define the process and analytical capabilities needed to supply gases of defined purities, aligning with generally accepted impurity maximums and analytical tolerances. For example, all designated PurityPlus® producers can package and certify nitrogen and argon to grade 5.0 (ultra high purity.) Moving up in the tiers usually involves the purchase of additional analytical and gas-filling equipment to fill higher purity atmospheric gases. Calibration and verification is carried out through NIST-traceable standards, most typically SRM’s, and substantiated by annual round-robin testing.

What is Traceability?

In our terms, we refer back to two definitions: • NIST - Traceability can be established as an nonstop record of documentation ("documentation traceability") or an uninterrupted chain of measurements and associated uncertainties ("metrological traceability"). As employed here, the word "traceability" always means "metrological traceability." • ISO 17025 - “property of a measurement result whereby the result can be related to a reference through a documented unbroken chain of calibrations, each contributing to the measurement uncertainty” PurityPlus® specialty gases’ specifications are traceable back to NIST’s Standard Reference Materials where such comparative gas standards exist. When particular SRM’s do not exist, equivalent comparative standards are used, either directly sourced from another designated national government agency outside the US, or by having a gas standard analyzed and certified by NIST or other designated entity.

How do you track and bill cylinders in my facility?

Our system of cylinder tracking is quite unique.  Each cylinder is tracked individually.  This virtually eliminates paperwork for cylinder movements and provides customers with the lower cylinder usage charge.  You only pay for cylinders you have, and not for cylinders that may accumulate on your account due to paperwork errors.
We can also point out inactive cylinders since we know when they were delivered.  Excess cylinders can create safety issues and will expose customers to unnecessary cylinder charges.  Other cylinder control methods cannot provide this information.
A System That Works for You.
  • Each cylinder has a radio frequency transponder installed.
  • On delivery, your customer order number is entered into the hand-held computer.
  • Our driver scans each cylinder being delivered and each empty cylinder being returned.
  • Our driver prints a delivery ticket on the spot.  One copy is attached to your order, the other to your packing slip.
  • The delivery-return information is uploaded daily to our computer.
Accurate Reporting Lets You Know Exactly Where Your Cylinder Inventory is At All Times
Reports are generated monthly and are available on demand.
These reports include:
  • Current delivery and return activity by serial number, gas type and date
  • Monthly usage
  • Average cylinder days outstanding
  • Mode-change opportunities (Microbulk)
  • Cylinders at each delivery location
  • Inactive cylinders 

What does having PurityPlus primary / certified standards mean?

PurityPlus® Specialty Gases offers several grades of calibration gas standards – Custom Mixtures, Certified Standards, and Primary Standards to meet the level of accuracy for your laboratory or production process. All PurityPlus® Specialty Gases are custom-mixed and analyzed, and then properly labeled in one of our independently audited laboratory facilities. Each PurityPlus® Production facility conforms to a strict set of quality-assurance measures and standard operating procedures. Each of these labs have been thoroughly inspected, certified and documented to be compliant with FDA, DOT, OSHA, and EPA requirements - among others - by AsteRisk, a globally known, reputable, independent certification company headquartered in the U.S. 

Exposure to hazardous chemicals results in steep fines, penalties, and a compromised workforce. PurityPlus® Specialty Gases meets regulations and ensures compliance with all primary and certified standards.

Please contact us with general questions or call 877-81P-PLUS (877-817-7587) and a representative will respond to your request within one business day.