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Neles™ N1 Series

About Neles™ N1 Series

The Neles scotch yoke N1 series actuator is designed for use with quarter turn valves in both modulating control and on-off service. The N1 actuator’s robust design ensures a long life in harsh environments due to unique features such as its internal tie-rod mechanism. This heavy duty actuator has all major approvals to meet industry standards and customer process requirements.

Technical Specifications
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Description

The Neles™ scotch yoke N1 series actuator is designed for use with quarter turn valves in on-off service. The N1 actuator’s robust design ensures a long life in harsh environments due to unique features such as its internal tie-rod mechanism. This heavy duty actuator has all major approvals to meet industry standards and customer process requirements.

The N1 series is availaible in either spring return or double acting configurations.

The scotch yoke u-shaped torque curve makes it suitable for on/off or ESD applications of large size valves. It can deliver the massive torque output necessary to unseat or seat a large size valve. The N1 series can deliver up to 311333 Nm / 229627 lb ft torque at 58 psi on the double acting model. For the spring return model, the actuator can output 147425 Nm / 108735 lb ft on the spring side and 218765 Nm / 161353 lb ft on the air side at 58 psi.


Specifications
Type:
Pneumatic piston type quarter turn actuator
Spring return or double acting versions
Supply medium:
Air, natural gas (sweet), nitrogen
Design pressure:
12 barg (pressure retaining parts)
Torque range:
25 Nm – 218765 Nm @ 4 bar, max up to 700000 Nm
Temperature ranges:
-20 … +80 °C normal, -20…+125 °C high
Protection class:
IP66M/IP67M (IEC 60529)
ATEX class:
Ex 2G IIC T6 / Ex 2D IIC T80C
Mounting face:
ISO 5211, VDI/VDE 3845
Features
  • Suitable for on/off, modulating and control valve applications in general service, protective service and safety applications eg. ESD or HIPPS
  • Ductile cast iron center body, fabricated carbon steel power and spring module provides rugged actuator construction. Alternative materials available upon request
  • Suitable for safety integrated systems up to and including SIL 3 accordance with IEC 61508
  • The vent valve has built in non-return function for IP67
  • Secondary vent valve function is to detect leakages in the rod seal area of pneumatic cylinder
  • Springs are non buckling, lifetime lubricated and epoxy coated
  • Ball bearing, flexi joint and the hardened yoke thrust pin bearing are all incorporated into the actuator for longer life time, smoother operation
  • Applications:
    • Emergency shutdown
    • Compressor anti-surge
    • High cycle control and on-off applications
    • High precision control
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