Gas Regulators California State University, （天然气监管机构加州州立大学,）.pdfVIP

Gas Regulators Introduction An entire web site could be devoted to explaining the various kinds of regulators (high pressure, corrosive gas, fluorine etc.) that are available! This page is not meant to be comprehensive, merely an introduction to regulators you might find in a typical inorganic or organic laboratory. If you are ever unsure about how to use a regulator or another piece of equipment, ask your laboratory supervisor or safety expert. There are typically a wide variety of gas regulators in your average chemistry department. The majority of these are single stage and two stage regulators such as the one shown below. The advantage of a two stage regulator is that the pressure flow remains consistent until the tank is nearly empty. Therefore, you might want to use a double stage regulator on a gas chromatograph (GC), but for a typical Schlenk line a single stage regulator would suffice. Two other common types of regulators that you might encounter are actually called flow control valves. Unlike a regulator, these DO NOT control pressure, only flow. However, they permit one to easily dispense gas from a cylinder. As they lack gauges, be extremely cautious when hooking a flow valve up to a vacuum line !! The manual flow control valve shown below on the left is usually used on small cylinders (carbon dioxide, ethylene etc.) and the one on the right is typically used on lecture bottles. Small single and double stage lecture bottle regulators are also available. Finally, note that you should NEVER use grease or oil on a regulator. Not only will it gunk up the inside and contaminate your reaction system, but these organic materials can react with the gas being dispensed. Never use an oxygen regulator for other gases. Cross-