The Stokes Microvac rotary piston pump has set the standard for performance, efficiency, reliability and repairability in the industry for over 80 years. The Stokes Microvac J series rotary piston pump has been improved, upgraded, and fine-tuned to deliver even better dependability and productivity combined with minimal maintenance and process downtime. The integral oil distribution system eliminates external pi ping and delivers leak-free operation in a stylised design. A stylised oil reservoir cover and side cover ‘O’ rings improve sealing to eliminate oil leakage. An integral gas ballast valve built into the side cover allows buick adaptation to automatic gas ballast. Stokes Microvac rotary piston pump can get peak pumping speed from 234 m3h-1 to 884 m3h-1 and ultimate vacuum to 3.3 x 10-2  mbar.


 Click here to download the PDF file: STOKES MICROVAC Rotary Piston Pumps

212JStokes 1 original



Features and benefits

  • Robust cast and ductile iron construction provides rugged, reliable operation
  • Efficient design provides maximum uptime with minimal moving parts and large clearance
  • Low ultimate blank-off with maximum speed down to 1 Torr and continuous high pressure pumping up to 600 Torr
  • Space-saving design which saves up to 50% of valuable floor space
  • Automatic lubrication system provides proper flow of oil to bearings and sealing surfaces and prevents back-flow into system
  • Gas ballast as standard
  • Total capability includes the manufacturing and service capabilities to keep your equipment in top operation with a broad range of vacuum system accessories


  • Automotive
  • General applications
  • Metallurgy
  • Vacuum coating
  • Vacuum melting
  • Chemical processing
  • Heat treatment
  • Leak detection
  • PET processing
  • Pharmaceuticals
  • Transformer drying and cable fluid conditioning


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