The shaft has two cantilevers. The impeller is on the left cantilever and the gas brake is on the right. The impeller at the input side has a 52 mm diameter with 14 vanes at angles of 24 degrees. The number of vanes at the discharge side is half as many at angles of 35 degrees. The impeller is made of anodized dural. The bearings consist of two radial and one double-action axial supports. The shaft is made of 1Kh18N9T steel. The turbo-expander is mounted in a cylindrical block with powder-vacuum insulation. The speed of the machine was measured by a magnetic meter. The pick-up unit is a steel nut encircled by an electromagnet. The actual efficiency was 0.53 due to the lower speed. The best way of increasing the speed is by the use of a small piston compressor on the supply line. Author
Unedited rough draft trans. of Khimicheskoe i Neftyanoe Mashinostroenie (USSR) n5 p8-10 1964.