Neles™ high cycling butterfly valve, series BO

Maximized operability by minimized switching time

Neles BO series butterfly valve is designed for Vacuum Pressure Swing Adsorption plants (VPSA). It is a wafer type, soft seated, high performance, single eccentric disc valve. The valve provides maximal endurance in fast cycling. Additionally, it provides long lasting tight shut off with excellent flow characteristics and high capacity while maintaining the internal tightness even up to 2 million cycles.

Best valve capacity on the market

Suitable for wet and dirty media

Fast and easy maintenance

Maximized availability by secure valve operation


  • 2 piece shaft design for high capacity
  • Hardened aluminum disc to reduce mass moment of inertia
  • Long lasting quadruple bearings to last up to 2 million cycles
  • Soft sealing bi-directional bubble tight construction
  • Cartridge bearing design for easy maintenance
  • Sizes up to NPS40 / DN1000
  • Encapsulate sealing element design ensures trouble free opening and closing
  • Switching time less than one second to guarantee the process efficiency
  • Quadruple bearings to ensure the maximum cycle life time and eliminates jamming


  • Vacuum pressure swing adsorption (VPSA) plants
  • Vacuum swing adsorption (VSA) plants


Size range DN 200 - 1000 / 8" - 40"
Temperature range upto 200 ºC
Pressure rating PN 10 - 16 / ASME Class 150