Radial inflow turbines (RIT), or turboexpanders, have become not only essential to the oil and gas industry, but also to specific applications in the realm of liquefied natural gas (LNG). Variable inlet guide vanes (vIGV) are RIT’s unique feature, rendering the turboexpander as a variable geometry turbomachine. In turn, this makes a turboexpander an effective solution for variable load and flexible LNG production.