Edwards XDD1 Dry Diaphragm Pumps the ultimate dry choice in high ultimate vacuum and fast pump-down. XDD1 diaphragm pumps are compact and efficient pumps used for backing small compound turbomolecular pumps in clean, high-vacuum applications and also designed to be free-standing benchtop units. A typical ultimate pressure of better than 5 x 10⁻⁸ mbar can be achieved when using an XDD1 to back a 70 l/s-1 turbomolecular pump. Features and Benefits - Dry pumping, lubricant-free technology eliminating the need for costly oil changes and disposal - Lightweight and compact with a small footprint, allowing flexibility of use - Ideal backing pump for small turbomolecular pumps - Worldwide 115/230 V or 24 V options - Complies with EN61010, EN1012, CSA/UL standards