Overview

This document details the technical specifications and performance data for the ZG Series Roots Type Blowers and Vacuum Pumps, including high-speed centrifugal and magnetic suspension blowers used primarily in powder engineering and pneumatic conveying systems.

1. Product Types and Applications

• High-speed centrifugal blowers
• Magnetic suspension blowers
• ZG Series Roots blowers and vacuum pumps
• Transparent centrifugal blowers
• Applications in powder engineering pneumatic conveying systems

2. Performance Data and Parameters

The core content consists of extensive tables presenting blower and vacuum pump performance under various operating conditions. Key parameters include:

• Rotational Speed (rpm): Ranges from 970 rpm up to 5000 rpm depending on model.
• Theoretical Capacity (Qth): Air flow capacity in cubic meters per minute (m³/min) at standard inlet conditions (20°C, 101.325 kPa absolute).
• Inlet Flow (Qs): Actual inlet air flow at different discharge pressures or vacuum levels.
• Shaft Power (La): Power required at the blower shaft in kilowatts (kW).
• Motor Power (Po): Recommended motor power ratings in kilowatts (kW), ensuring proper motor sizing.
• Motor Pole Number: Number of poles affecting motor speed and performance.

3. Operating Conditions and Definitions

All performance data assumes standard inlet air conditions of 20°C temperature and 101.325 kPa absolute pressure to maintain consistency and comparability. Flow rates correspond to these conditions.

4. Pressure and Vacuum Performance

Performance tables cover a range of discharge pressures (9.8 kPa to 98 kPa) for blowers and vacuum levels (-9.8 kPa to -49 kPa) for vacuum pumps, enabling selection based on specific pressure or vacuum requirements.

5. Model Identification and Selection

Models are identified by codes such as ZG-50, ZG-65, ZG-80, ZG-100, ZG-125, ZG-150, ZG-175, ZG-200, ZG-250, ZG-290, and ZG-300. Vacuum pump variants carry a "V" suffix (e.g., ZG-125V). Each model has defined rpm ranges and performance characteristics.

6. Drive and Transmission Notes

ZG-290 and ZG-300 models typically use belt transmission. Direct coupling drive is possible at 970 rpm and 1450 rpm if specified in contracts.

7. Outline and Installation Drawings

• Drawings provided for all major models, including blower packages for pressure and vacuum applications.
• Separate drawings for units with acoustic enclosures and ZMG outlet silencers.
• Applicable to general low voltage motors Y355 and below.

8. Key Technical Recommendations and Limitations

• Ensure inlet air conditions match standard parameters for accurate performance.
• Match motor power and shaft power carefully to operating conditions for safety and efficiency.
• Confirm drive mode (belt vs direct coupling) for ZG-290 and ZG-300 models in contracts.
• Reference installation drawings for mechanical integration, especially when acoustic enclosures or silencers are used.

9. Summary of Data Tables

Data tables provide:

• Theoretical capacity and inlet flow rates at various vacuum or pressure levels per model and speed.
• Shaft power consumption and recommended motor power ratings.
• Motor pole counts indicating electrical motor configuration.

This information is critical for selecting appropriate models based on flow, pressure/vacuum, and power availability.

Conclusion

This document is a comprehensive technical reference for engineers and technicians involved in the selection, installation, and operation of ZG Series Roots Type Blowers and Vacuum Pumps. It facilitates informed decision-making for pneumatic conveying and industrial ventilation applications by providing detailed performance data, mechanical outlines, and operational guidelines.