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- Product Line Overview
- Regulator Selection and Performance
- Basic Regulator Selection Chart
- Specialty Regulator Selection Chart
For Instruction Manuals and reference information about cylinders, conversions, and safety, visit our Publications Library.
What is the function of a Cross Purge Assembly?
Used during cylinder changeovers, a cross purge assembly serves two purposes:
- PURITY - helps to prevent contamination of the gas stream hardware components by blocking the entry of ambient impurities
- SAFETY - enables safe venting of toxic gases that would otherwise be released during changeover
Single vs Dual Stage.
Single Stage regulators - if left unadjusted - inherently exhibit an increase in output pressure as the cylinder pressure declines. If your gas usage is on for short periods, and/or periodic pressure re-adjustment is practical, then a single stage regulator is a useful choice.
Dual Stage regulators will maintain a more constant outlet pressure - even as the pressure in the cylinder declines. So, if your application is one where gas flow is ON for long periods, AND pressure changes are not desirable - then you should choose a dual stage regulator.
Single Stage regulators are also ideal for point of use installations on site-wide gas distribution systems. Site-wide systems (or building-wide systems) typically provide pressure control at the gas source - thus constituting the "first stage of a dual stage regulator." Downstream, at the point of use, such as a lab bench, a single stage regulator constitutes the second stage. This is why Line Regulators invariably are single stage devices.
Refer to Product Line Overview document for additional insights.