Vacuum Ranges & Appropriate Pump Technologies

Vacuum Ranges & Appropriate Pump Technologies

Vacuum Ranges & Appropriate Pump Technologies

Pumps for High and Ultra-High Vacuumhttps://asiapumps.ir

Vacuum pumps are selected based on the desired pressure range, which dictates the technology needed. Common ranges include rough/low vacuum (1000 to 1 mbar), medium/fine vacuum (1 to 10⁻³ mbar), high vacuum (10⁻³ to 10⁻⁷ mbar), and ultra-high vacuum (10⁻⁷ to 10⁻¹² mbar)Different pump types are suited for these ranges, such as mechanical pumps for rough and medium vacuum, turbomolecular pumps for high vacuum, and ionic or cryopumps for ultra-high vacuum. 

Here’s a breakdown of vacuum ranges and corresponding pump technologies:
۱٫ Rough/Low Vacuum (1000 to 1 mbar / 760 to 0.75 Torr): 

  • Typical Pumps:
    Mechanical pumps like rotary vane pumps, scroll pumps, and liquid ring pumps are commonly used. 

  • Suitable Applications:
    These pumps are used in applications like freeze drying, packaging, and vacuum chucking. 

  • Pump Characteristics:
    These pumps typically handle large volumes of gas and are relatively simple in design and maintenance. 

۲٫ Medium/Fine Vacuum (1 to 10⁻³ mbar / 0.75 to 7.5×10⁻³ Torr):
  • Typical Pumps: Rotary vane pumps, scroll pumps, and dry pumps are suitable choices. 
  • Suitable Applications: This range is often used in laboratories for experiments and some industrial processes. 
  • Pump Characteristics: These pumps offer higher vacuum levels than rough vacuum pumps, but may require more complex maintenance or specific oil types. 
۳٫ High Vacuum (10⁻³ to 10⁻⁷ mbar / 7.5×10⁻³ to 7.5×10⁻⁷ Torr):
  • Typical Pumps:
    Turbomolecular pumps, diffusion pumps, and sometimes roots pumps are used in this range.
  • Suitable Applications:
    High vacuum is crucial for semiconductor manufacturing, surface science, and some analytical instruments.
  • Pump Characteristics:
    These pumps can reach lower pressures but may be more sensitive to contamination and require careful operation. 

۴٫ Ultra-High Vacuum (10⁻⁷ to 10⁻¹² mbar / 7.5×10⁻⁷ to 7.5×10⁻¹² Torr):
  • Typical Pumps: Turbomolecular pumps, ion pumps, and cryopumps are used in this range.
  • Suitable Applications: UHV is necessary for advanced research, such as in particle accelerators and materials science.
  • Pump Characteristics: These pumps can achieve very low pressures and are essential for experiments where even trace amounts of contaminants can affect results. 
۵٫ Extreme High Vacuum (less than 10⁻¹² mbar / 7.5×10⁻¹² Torr):
  • Typical Pumps: Cryopumps, getter pumps, and specialized ion pumps.
  • Suitable Applications: Applications requiring ultra-clean, contamination-free environments, such as in some high-energy physics experiments.
  • Pump Characteristics: These pumps are designed for the most demanding applications and often involve complex technologies and processes. 
Choosing the right pump technology depends on several factors, including:
  • Pressure Range: The specific pressure required for the application. 
  • Pumping Speed: How quickly the pump can remove gas from the system. 
  • Ultimate Pressure: The lowest pressure the pump can achieve. 
  • Gas Type: The type of gas being pumped can affect pump selection. 
  • Contamination Sensitivity: Some pumps are more susceptible to contamination than others. 
  • Maintenance Requirements: Consider the complexity and frequency of maintenance. 
  • Cost: The cost of the pump and its operation.