When sourcing barrier washers, the most critical feature is the dual-door 'pass-through' design, which physically separates the loading (soiled) side from the unloading (clean) side to prevent cross-contamination. You must verify the G-force extraction factor (ideally >300G) to reduce drying time and energy costs. Additionally, ensure the inner drum is made of AISI 316 or 304 stainless steel to resist corrosion from heavy-duty disinfectants, and check for programmable PLC control systems that allow for precise temperature and chemical dosing adjustments.