In the processing and production of ethylene, propylene, polyethylene, polypropylene, ammonia, chlorine and other chemicals, a wide range of reciprocating compressors may be employed. While operating conditions can be greatly varied, common among these application is the likelihood of dirty service and the need for specialized engineering of components to extend service life. High pressures may combined with toxic and/or corrosive gases to lead to rapid ring wear and increased leakage.
Cook Compression can increase mean time between repair (MTBR) with advanced designs and proprietary materials – and can also provide compressor assessment to identify opportunities for improving performance.
TruTech 3330 Engineered Materials
High-performance TruTech™ 3330 is a proprietary polymer alloy that delivers extended service life for sealing components in non-lubricated compressors. Components made from TruTech 3330 have delivered longer, more reliable service in a wide range of dry gases, including hydrocarbon mixtures, ammonia and ethylene.
|Service||Lube (Yes/No)||Product Type||Discharge (psi)||Avg Speed (ft/min)||Comments|
|Isobutane||N||Piston rings, rider rings||225||750||3x improvement over filled PTFE|
|Ethylene||N||Piston rings, rider rings||195||814||3x improvement over filled PTFE|
|Carbon dioxide||N||Piston rings, rider rings, packing rings||240||430||6x improvement over filled PTFE|
|Ethylene||N||Piston rings||200||788||4x improvement|
Low-Emissions Rod Packing
Using Cook’s patented gapless rod packing improves sealing effectiveness, decreases leakage and reduces frictional loading against the rod. Ultimately, the ring technology extends packing life by lowering the rod temperature.
Valves for Sticky Gas
The Manley® radiused-disc compressor valve have proven performance in the high pressures and sticky gas associated with ethylene and propylene service, and in hydrogen and hydrogen-rich compressors. The valve body, springs and bolts are constructed from alloys carefully selected for their high resistance to corrosion; plastic internals are available for chlorine compressors. In addition, flow area, spring force clearance volume and lift area are engineered for each application to generate flow, as well as reliability, improvements.
The MOPPET® valve also provides excellent service in high-pressure applications, delivering long life by combining advantages of the Manley valve with key benefits of poppet valves. Materials are selected to resist corrosion, hydrogen embrittlement, and damage from debris, while the customized flow path maximizes gas volume.