Manual sliding airtight doors are designed specifically for clean and enclosed environments. They are available in single-opening and double-opening models. Special airtight sealing strips are embedded around the door's perimeter, ensuring a tight seal with the frame when closed, effectively isolating airflow, dust, and microorganisms while meeting the pressure differential requirements of clean areas. Utilizing silent slide rails and high-strength pulleys, manual pushing and pulling is smooth and effortless. An optional self-closing device enables automatic reset and closure. Surface options include stainless steel, color steel plate, or medical antibacterial board, which are easy to clean and corrosion-resistant.