The Rotork Noah is a family of electric actuators (electric valve actuators) designed for industrial valve control, for example in oil, gas, water, chemical and power generation systems. In 2025, Rotork acquired the South Korean company Noah Actuation, integrating the product range into the Rotork portfolio.
Key features
- Multiple configurations: The Noah range includes linear, quarter-turn and spring-return actuators, allowing flexible use with various valve and damper types.
- Robust industrial design: Housings are made of aluminium alloy with IP67 protection as standard or optional IP68 protection against dust and water; explosion-proof versions are also available for certain models.
- Control and communication: Support for local control via switches/control units, with optional communication modules (Modbus, Profibus, HART, etc.) for integration into automated systems.
- Safety and reliability: Built-in thermal and torque protection, mechanical limit switches, and manual override for operation during power failure are standard features.
- Accuracy and control: Advanced models offer proportional control, visual position indication and even supercapacitor-based solutions for safe closing operations without external power supply.
- Wide range of applications: Suitable for simple open/close duties as well as modulating (proportional) control, and compatible with various valve and damper types (e.g. ball valves, butterfly valves).
Application areas
- Water and wastewater treatment
- Chemical and oil & gas systems
- Power generation and heating, ventilation and air conditioning (HVAC) systems
- Industrial process control
IQ (3) - multi-turn electric actuator(18 - 192 rpm / 50 Hz)
SUMMARY OF MECHANICAL AND PERFORMANCE DATA:
Available sizes: IQ10 - IQ95 , mounted directly to each valve application, by 34- 3 000 Nm output torque range
By means of possible assemblies combinating with gearboxes for required torque transformation
multi-turn output (e.g.: gate valve, globe valve etc.) up to 43 000 Nm
quarter-turn output (e.g.: ball valve ) up to 1 000 000 Nm
For on&off applications available up to 60 starts per hour duty cycle
On&Off actuators: S2-15min/ S3-25% (25% of rated nominal torque)
absolute position sensing by redundant sensor equipment
Mounting flanges by national standards - either directly mounted to valve or an inermediate (2nd stage) gearbox: Sizes- F10-F30 acc. to ISO 5211
Enhanced output dirves, available types B4; B3; B1; A; Z3
Ambient Temperature:
WT - -30 .. +70 °C
Further certificates under usage in international regions (e.g.: EAC; CSA; IEC 60529 etc.)
Power Supply:
1 phase
3 phase
DC - details in technical catalouges
Control & Indication (feedback):
local control by selector knobs: Open/Close and Local/Stop/Remote
local feedback on dual stacked LCD screen- configuration, diagnostic, alarm warnings, etc.. -supplementary luminating LED indicators
remote control: inside 24 VDC derived and over hardwired contacts (proportional analouge control by 4..20 mA as an option), or derived from external equipment by customer
Indication: over 1 pc of monitor relay + 4 pcs - configurable volt-free latching relay contacts/ NO or NC (further 4 pcs of relay switches upon requuest)
Further features:
Bluetooth and preused Infrared sign for non-intrusive settings and maintenance
Automatic phase rotation correction
Self-maintain either in local or remote control mode
Manual Override in case of power or signal loss
Standard Limit Switches inside the actuator
Power supply connection active, ESD active, etc.
Additional Cable glands and cable entry plugs
Foundation Fieldbus-further Network System Control options by network Interface Cards
Pakscan
Modbus
Profibus
Foundation Fieldbus
HART
Lubricants:
SAE80EP - std.: for temperature 30 .. + 70 °C
MOBIL SHC624: for temperature -50..+ 70 °C
Hydra Lube GB Heavy for temperature -20.. +70 °C-ra (optional food grade usage)
Painting and corrosion protection:
For IQmk3; IQmk2 & IQT mk3
Coatings for protection acc.to ISO 12944-2 (C1..C4/ C5-M, C-I classes)
Basic procedure and used top-colour - D1036 (Interpon) BS4800 00-A-05 Light gloss Grey
Motor:
IQmk3: 3-phase squirrel cage motor for on&off (Class A&B application incorporating thermostat protection; Class F - insulated
IQTmk3: Class-H insulated permanent magnet 24 VDC motor incorporating thermostat protection for on&off-inching (Class A&B application)
