Manually operated swing airtight doors are designed specifically for clean and sealed environments. They are available in two types based on opening method: manual single-opening swing airtight doors and manual double-opening swing airtight doors. Special airtight sealing strips are embedded around the door perimeter, ensuring a tight seal with the door frame when closed, effectively isolating airflow, dust, and microorganisms, and meeting the pressure differential requirements of clean areas. Heavy-duty hinges and stainless steel handles make manual opening easy and effortless. A self-closing spring is optional for automatic reset and closure. The door surface can be made of stainless steel, color steel plate, or medical antibacterial board, which is easy to clean and corrosion-resistant.