O le Mid-pressure oloa e faʻaaogaina mo felauaiga ma teuina o mea o loʻo gaosia, pei o le kesi suavaia, anhydrous ammonia, propylene, butadiene, isobutene, dimethyl ether ma isi mea vailaʻau, ia ma le tele o aofaʻi, malamalama mama ma vave avega & utaina fua.