When evaluating a rotary washing machine, prioritize the drum capacity (kg/lb) and G-factor (extraction force), as these directly impact throughput and drying efficiency. Ensure the machine features a frequency inverter drive for smooth speed transitions and energy savings. For industrial longevity, the inner and outer drums must be constructed from SUS304 or SUS316L stainless steel to prevent corrosion from detergents and chemicals. Additionally, verify the heating method (Steam, Electric, or Gas) aligns with your facility's utility infrastructure.