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Core Products

Two-stage compression
Permanent Magnet Variable Frequency Screw Air Compressor

Equipped with a two-stage compression structure and an energy-grade-1 permanent magnet variable frequency motor, it delivers superior energy savings compared to standard single-stage air compressors. With a wide power range across the entire series, it ensures stable, durable air supply tailored for long-term continuous production in industrial settings.

Host Advantages

· Low-speed design for the large rotor: quieter operation and higher reliability
· Forced mist oil cooling for near-isothermal compression
· Isobaric design for reduced leakage and higher volumetric efficiency

Motor Advantages

· Varies speed with air volume while maintaining high efficiency under both loading and unloading conditions
Reliable operation at low temperature rise under full load
Efficiency between 25% and 120%, exceeding 90%, far surpassing the national standard Grade 1 energy efficiency.

Advantages of Variable Frequency Drives

Variable frequency drive for compressors with modular, layered design
· Vector control algorithm with parameter self-learning
Rectifier harmonic suppression with high reliability and stability

4 Utility Model Patents · 7 Mine Safety Certification · ISO9001 Quality Management System

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Two-Stage Compression Permanent Magnet Variable Frequency Screw Air Compressor

Host

motor

Variable Frequency Drive

Sanzhi Permanent Magnet Variable Frequency Oil-Reduced Screw Vacuum Pump

Sanzhi Permanent Magnet Variable Frequency Low-Oil Screw Vacuum Pump

SZVP Micro-oil Permanent Magnet Variable Frequency Screw Vacuum Pump. Engineered for industrial negative pressure applications, achieving an ultimate vacuum of 0.098MPa (20mbar) and a working vacuum range of -0.05 to -0.098MPa. The permanent magnet variable frequency drive adjusts pumping speed on demand, delivering significant energy savings compared to traditional vacuum pumps. The micro-oil screw pump head ensures stable operation and can withstand minor moisture and dust. Its air-cooled design eliminates the need for cooling water and wastewater discharge, enabling easy installation. An intelligent touch-control system features built-in fault alerts and protection, supporting continuous long-term operation. It effectively replaces water ring and vane pumps, making it ideal for central vacuum stations, adsorption, dehydration, and degassing processes. Widely used in building materials, rubber & plastics, CNC machining, semiconductors, and solar PV processing industries.

Power7.5kW-90kW

Stress500-20 mbar

Gas production590-5400m³/h

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