Liquid hydrogen is colourless, odourless, transparent low-temperature liquid liquefied by pre-cooling and expansion refrigeration process which cools down the hydrogen gas to -253°C. Liquid hydrogen is the mixture of para-hydrogen (p-H2) and ortho-hydrogen (o-H2). A typical liquefaction plant mainly includes: hydrogen pretreatment system, hydrogen pre-cooling cold box (80K), hydrogen liquefaction cold box (20K), refrigerant circulating system, liquid hydrogen storage system and utility system etc ; GUOFUHEE owns 5-30TPD hydrogen liquefaction process packages and developed key equipment like cold box, hydrogen expander, liquid hydrogen storage tanks etc to provide customers with cutting-edge total solutions.