Hydrogen storage and refueling stations require oil-free compressors to maintain gas purity. This poses very high demands on the piston ring, sealing, and materials.
According to Cook Compression, hydrogen is a light gas with very small molecules, making it difficult to seal. Leak prevention depends heavily on the piston ring and sealing box made from specialized materials. The company designs piston rings with special geometry to create complex flow paths to limit gas leakage, combined with hydrogen-resistant metals and new polymers that reduce wear.
According to Technetics, diaphragm compressors are the standard choice for electronic and pharmaceutical-grade hydrogen due to their non-contaminating nature. The company notes that failures often start at contact points such as the diaphragm clamping area and sealing edges, and internal leaks quietly reduce capacity.
Oil and Gas News (Cook Compression), Technetics. The article is compiled and reinterpreted by SNS-VN; brand names belong to their owners.