Neles™ pneumatic cylinder actuators, series B1

For use in both modulating control and on-off service


Neles double acting and spring return B1-series piston type quarter turn actuators are designed for use in both modulating control and on-off service. These actuators offer an extremely long cycle life and are well suited to operate almost any type of rotary valve.

Long cycle life

Fast and sensitive response

Unified design through the whole product range

Proven reliable design


  • Wear and corrosion resistant design
  • Safe and easy maintenance
  • Suitable for various services, from control to demanding ESD and arctic conditions
  • Vast number of optional features
  • Rugged design
  • Wide torque range
  • Type approval according to EN 15714-3


  • Emergency shutdown
  • Compressor anti-surge
  • High cycle control and on-off applications
  • High precision control
  • Arctic service


Type: Pneumatic cylinder actuator  
Series: B1C - double action  
  B1J - spring return  
Supply pressure: 2.8 - 10 bar  
Torque range: 28 - 100000 Nm  
Temperature ranges: -55 to +120 °C  
Protection class: IP66, IP67 (IEC 60529)  
ATEX class: Ex II 2G/D c IIC TX  
Mounting face: ISO 5211, VDI/VDE 3845