When a product cannot tolerate air, agitation or a temperature above 60 °C, drying becomes a static, sealed operation. The YZG-1000 static vacuum tray dryer is built exactly for that case: trays loaded with powder or granule sit on a heated shelf rack inside a vacuum chamber, and moisture leaves the product by conduction through the tray bottom while a vacuum pump holds the chamber at 0.098 MPa or better. There is no air stream, no impeller and no tumbling, so the material