These new SIR™ single-station manifolds (also known as "protocol stations") are designed to provide safe, reliable method to wallmount a two-stage Smart Indicating Regulator (SIR™). This eliminates the need to handle the regulator during cylinder change out. The brackets are fabricated from Type 304 stainless steel for durable, long-life service and are suitable for connection of most single- and two-stage regulators. The Airgas® two-stage Smart Indicating Regulator (SIR™) component of this manifold provides accurate pressure control while maintaining gas purity at 99.9999% pure or better. The two-stage SIR safeguards the system from contaminants that normally enter the gas stream during cylinder change out, if a lower grade of gas is connected to the system, or if there is a purity issue with the gas. SIR provides a visual indication if leaks have developed downstream from the regulator. When the purifier changes colors from the top down, it is removing impurities in the gas stream. These impurities may be from gas that is less than 99.9999% pure or from contaminants that entered the gas stream during cylinder change out. If the purifier turns color from the bottom up, the system has a leak downstream from the regulator. When the entire purifier has changed color, it simply needs to be replaced. The Airgas SIR Manifold, with the block-and-vent valve assembly incorporated into the pigtail at the CGA connection, will completely contain and remove all contaminants entering the gas stream that occur during cylinder change out. The pigtail assembly has a CGA nipple with an integral check valve. This check valve prevents mass contaminants from entering the regulator. The small amount of air and moisture introduced during cylinder change out are trapped between the nose of the CGA and the inside of the cylinder valve. The vent valve is specially designed to create a vacuum which totally removes contaminates before they enter the process stream. The purifier has a patented quick-change base to allow for easy change out of spent purifiers. The base has integral check valves built into the selfpiercing connectors. These check valves allow the spent purifier cartridge to be changed without exposing the gas stream to contamination. The regulator portion is specially cleaned for all analytical applications and will not generate contaminates that consume the purifier. The built-in safety relief valve protects instruments downstream, as well as the purifier, in the event of a regulator failure. The manifolds are provided complete with a SIR regulator, 30" stainless steel (corrugated bellows) flexible pigtails with a block and vent valve assembly.

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