Scroll technology is widely used in refrigerators as compressors and as expanders. This research paper presents the performance of a scroll-type expander derived from a scroll compressor. The research is carried out at low pressures. The effect of mechanical load on performance has been evaluated using compressed air as a working fluid. Two stages of the evaluation process are carried out in this research. In the first stage, the scroll expander model is numerically simulated using the CFD approach to predict the factors influencing the scroll expander performance. In the later stage, an experiment is carried out on a scroll-type expander prototype developed from a scroll compressor. To find the torque fluctuations with load, a rope and brake dynamometer system is adopted. The developed prototype can work as a scroll expander in the low-pressure range which is chosen between 1.379 bars to 4.13 bar. From the simulation analysis, the mass flow rate, speed, and pressure are predicted factors that affect the performance of a scroll-type expander. From the experimental results with varying mechanical load, the scroll efficiency and volumetric efficiency change with pressure ratios are evaluated.