CNG Compressor Solutions

Cook Compression ultra-low-leakage ring technology is optimal for small CNG compressors.

With a patented, gapless design, each set of packing rings provides greater sealing capacity than traditional ring sets, reducing the number of cups and rings required and thus reducing frictional heat generation. The technology also uses the compressive properties of the ring materials to seal in sequence through a compressor stroke, reducing ring wear and providing greater sealing effectiveness, especially at higher pressures.

RTV oil wiper packing uses a proprietary knife-edge geometry to remove crankcase oil film wherever it contacts the rod, keeping oil from the fuel supply. The single-groove design of the RTV oil wiper improves gas sealing to reduce fugitive emissions, which is especially advantageous in short-frame CNG compressors that do not have a separate wiper housing.

Wiper packing geometry is combined with a material designed to improve oil-wiping efficiency. TruTech^® P1110, for example, is a PTFE-based compound engineered to provide a sharp wiping edge over extended use. It also allows the wiper rings to conform tightly to the rod surface, eliminating potential leak paths.