Process Gas Compressor Products

Overview Natural gas is never a single specification. Wellhead gas, associated gas, wet gas, pipeline-quality gas and CNG each arrive with a different composition, water and heavy-hydrocarbon content, heating value and pressure – and the compressor has to be engineered around the gas that is actually...

Overview Oxygen is the one common industrial gas where an ordinary compressor design becomes a genuine fire hazard. High-pressure oxygen combined with hydrocarbon contamination — oil film, grease, a dirty thread, a rubber O-ring — can ignite. Once an oxygen system ignites, it burns in the metal itself,...

Overview Carbon dioxide is a misleading gas. It behaves almost ideally at low pressure and then departs from it sharply as pressure rises, so the compressibility factor, the exponent and the density all have to be taken from real gas data rather than estimated from an air-like model. On top of that,...

Overview Hydrogen chloride and chlorine are the gases that punish anyone who tries to reuse a natural gas design. Both are strongly corrosive, and in the presence of even trace moisture the corrosion rate rises sharply. Dry chlorine is manageable with the right materials; wet chlorine attacks most common...

Overview This page covers carbon dioxide duty where the machine operates close to or inside the dense-phase region and where the thermodynamic model, not the mechanical hardware, is the hard part of the design. In dense-phase CO2 the density approaches that of a liquid while the fluid remains a single...

Overview A biogas compressor spends most of its life dealing with what is in the gas rather than with the gas itself. Raw biogas from anaerobic digestion or landfill is saturated with water, carries hydrogen sulphide, ammonia, siloxanes and particulates, and its composition drifts with feedstock, temperature...

Overview A hydrogen compressor cannot be specified the way a natural gas machine is. Hydrogen has the smallest molecule of any industrial gas, so it migrates through clearances that would seal perfectly on methane, it changes the fatigue behaviour of high-strength steels, and it demands a hazardous-area...

Overview Nitrogen compression looks simple until cleanliness and safety are taken seriously. Nitrogen is inert as a process gas, but its purity requirement is often absolute — a few parts per million of lubricating oil can disqualify a batch — and it displaces oxygen in enclosed spaces, which makes ventilation...

Overview Anhydrous ammonia is easy to compress mechanically and difficult to handle safely. It is toxic, it attacks copper and copper alloys, it is strongly hygroscopic, and its behaviour changes markedly with pressure and temperature. A machine that ignores those properties will run, but it will not...

Overview Propylene compression is a light hydrocarbon duty with a chemical complication: under the wrong conditions the gas can polymerise, and the resulting deposits foul valves, packings and sealing surfaces. The machine must therefore be designed not only for the pressure and flow, but for the operating...