
OEM Screw Vertical Oil-Free Reciprocation Backing Roots Vacuum Pump Unit. Oil-Free Clean Vacuum: Self-lubricating material ensures clean vacuum without oil contamination. High Efficiency Series Design: Combines ZJ Roots main pump with WLW fore pump for rapid speed and high rate. Environmental Protection: Collects non-condensable gases like benzene to prevent environmental pollution. Wide Industry Application: Used in chemical, food freeze drying, and medicine vacuum drying processes. Custom Voltage Options: Special voltages and frequencies available for global export market adaptability. Fast Standard Lead Time: Standard production lead time is 15 days or less for swift delivery. Stock Availability: Select models are kept in stock for immediate delivery to avoid delays. Proven Manufacturer: Annual production exceeds 2,000 units with exports to over 20 countries.