![]() When transporting lecture bottles, use a cart and block the bottles to prevent rolling and falling.Whenever possible, purchase lecture bottles from suppliers who will accept the return of empty or partially empty bottles. If labels and valve tags do not agree, or if there is any question as to the contents of a lecture bottle, return the unused bottle to the supplier or contact Research Safety.Unlike larger cylinders, lecture bottles all have identical valve threads, irrespective of the gas contained within.Lecture bottles do not have pressure-relief devices to prevent rupturing or a transport cap.In addition to standard precautions, the following special rules apply to work with lecture bottles in the laboratory: Secure cylinders by metal channels, nylon bench straps or chains. Keep the cylinder valve-protection cap on when not in use. If the chain or belt is too low or too high, it will not hold the cylinder securely. Secure the cylinder above its center of gravity (~2/3 up the cylinder). Cylinders designed for liquid phase dispensing have a siphon, or “dip”, tube. Some gases, such as carbon dioxide, are commonly used in both a liquid and gas form. Acetylene is the only common dissolved gas. Dissolved gas cylinders are packed with an inert, porous filter saturated with the solvent which stabilizes the volatile gas. Dissolved gases are dissolved in a liquid phase solvent.The standard 5 foot gas cylinders supplied by gas vendors at a pressure of 2,200 – 2,400psi, contain an average of 250 cubic feet of gas at normal temperature. Examples: argon, oxygen, nitrogen, hydrogen. Non-liquefied gases are entirely gaseous at normal temperatures regardless of charge pressure.Examples: chlorine, propane, nitrous oxide. Liquefied gases are partially liquid at normal temperature and charge pressure.We supply compressed and synthetic air in a variety of cylinder types and sizes to meet your individual purity and volume demands.There are three major groups of compressed gases stored in cylinders. Compared with an oxyfuel flame, it gives welders greater control over the thickness of the carbon coat.Ĭompressed air is also used for pneumatic drills, plasma cutting and metallurgical processes such as die casting and blast furnaces. An air-fuel flame is suitable for brazing, soldering and carbon coating lower-temperature alloys. ![]() When combined with a fuel gas, compressed air produces a flame with a lower temperature than an oxyfuel flame. Regular ambient air can also be compressed for a variety of applications where ultra-high purity is not critical. Other applications include medical gas mixtures and atomic absorption flame spectrometry. It is also used as an oxidiser for flame ionisation detectors in laboratory research and development. In fact, it is used as a balance gas in many calibration mixtures. Synthetic Airīecause of its purity, synthetic air is used as a zero gas in the running and calibration of environmental monitoring and test equipment. This is produced by mixing pure oxygen (20%) with pure nitrogen (80%). As regular ambient air contains a number of impurities, synthetic air is the preferred choice for these applications. ![]() Some of these applications call for extremely high levels of purity. PLASTINUM Dynamic Temperature Control with CO₂Īs a source of oxygen, air is essential for combustion, respiration, decay and various industrial processes – including oxidation. PLASTINUM Gas Injection Moulding with Inner Cooling PLASTINUM Gas Injection Moulding with CO₂ SOLVOX® aquaculture hose & ceramic diffuser Hydrogen Applications for Chemical Production Pure oxygen for efficient ozone generationĪdvanced Temperature Control of Injection Moulds Neutralisation and remineralisation with carbon dioxide Inerting, purging, sparging, pressure transfer Heating, Ventilation & Air Conditioning (HVAC)
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