The Neles M-series manual worm gear actuator is a handwheel-operated worm gear drive unit with a cast iron housing. The actuator complies with the ISO 5211 mounting standard and provides an output torque range of 330–8400 Nm. It features adjustable travel stops in both the open and closed positions, as well as a fully enclosed, weatherproof design. Suitable for outdoor applications and demanding industrial environments such as dusty locations, it operates from -20 °C to +80 °C and meets the selection requirements of rotary valves requiring high-torque manual actuation and end-position adjustment.
Neles M-series manual actuator
Neles
Neles M-series Manual Worm Gear Actuator
Manual worm gear actuator for rotary valves with adjustable open and close position limits.
- Category
- Actuators
- Output torque range
- 330–8400 Nm (243–6202 lb-ft)
- Operating temperature range
- -20 °C to +80 °C (-4 °F to +176 °F)
Specifications
- Drive mechanism
- Handwheel-operated worm gear mechanism
- Output torque range
- 330–8400 Nm (243–6202 lb-ft)
- Operating temperature range
- -20 °C to +80 °C (-4 °F to +176 °F)
- Mounting standard
- ISO 5211
- Housing material
- Cast iron
- Protection design
- Fully enclosed, weatherproof
- Limit adjustment
- Adjustable limits at both the open and closed positions
- Drive options
- Key drive available
Application scenarios
Manual operation of ISO 5211-compliant rotary valves
For manually opening and closing rotary valves that comply with the ISO 5211 mounting standard. The handwheel-operated worm gear mechanism provides an output torque of 330 to 8400 Nm, making it suitable for valve applications requiring high operating torque.
Manual valve operation in outdoor and generally demanding environments such as dusty conditions
Suitable for manual valve operation in outdoor or generally demanding industrial environments with operating temperatures from -20 °C to +80 °C. The fully enclosed, weatherproof design and cast iron housing help protect the drive mechanism and reduce maintenance requirements.
Open and closed position limiting for rotary valves
For manual drive applications requiring the fully open and fully closed positions of a rotary valve to be set. The actuator has adjustable limits at both the open and closed positions, allowing the valve end positions to be set according to site requirements.
Selection points
High-output-torque worm gear mechanism
The handwheel-operated worm gear mechanism provides an output torque range of 330 to 8400 Nm. Compared with lever operation, it delivers higher output torque while requiring less installation space.
Adjustable travel stops in both open and closed positions
Adjustable travel stops are provided for both the open and closed positions, allowing on-site adjustment to match the actual valve travel.
ISO 5211 standard interface with key-drive option
The actuator uses the ISO 5211 mounting standard and can be equipped with a key drive, making it suitable for valves with corresponding interfaces and drive arrangements.
Fully enclosed, weatherproof design
The fully enclosed, weatherproof construction is suitable for installations where the drive mechanism must be protected from external environmental conditions.
Installation notes
Verify the operating temperature range
During installation and operation, confirm that the ambient or process temperature at the site remains within the operating temperature range of -20 °C to +80 °C.
Match the output torque and ISO 5211 interface
Before installation, confirm that the valve torque requirement falls within the actuator output torque range of 330 to 8400 Nm and ensure that the valve connection interface complies with the ISO 5211 mounting standard.
Check and adjust the open and closed position stops
After installation, check and adjust the actuator's adjustable travel stops for the open and closed positions based on the valve's actual fully open and fully closed positions.
FAQ
What operating principle does the Neles M-series manual actuator use, and is it suitable for valves requiring high manual operating torque?
The Neles M-series uses a handwheel-driven worm gear mechanism to convert handwheel input into higher output torque. With an output torque range of 330 to 8400 Nm, it is suitable for applications requiring high valve operating torque through manual actuation. The specific configuration must be confirmed based on the actual model and application conditions.
What are the application advantages of the Neles M-series manual worm gear actuator compared with direct lever operation?
The series uses a worm gear mechanism to provide higher output torque. Compared with lever operation, it offers more convenient operation and can reduce the required installation space. The actuator is equipped with a highly visible position indicator, and both the open and closed positions can be set using adjustable travel stops, helping improve control of manual valve operation.
How is the Neles M-series manual actuator connected to a valve, and how should it be selected?
The Neles M-series uses an ISO 5211 mounting arrangement and can be used with valves that meet the corresponding interface requirements. During selection, verify the valve operating torque requirement, mounting interface, ambient temperature, and whether options such as locking, high-temperature service, marine service, buried service, or a key drive are required. The specific configuration must be confirmed based on the actual model and application conditions.
What ambient temperatures and site conditions are suitable for the Neles M-series manual actuator?
The standard temperature range is -20 to +80 °C. The actuator features a fully enclosed, weatherproof design and is factory-filled with lifetime lubricant. Options are also available for locking, high-temperature service, marine service, and buried service. For projects exceeding the standard temperature range or involving special environmental requirements, the actual model and application conditions must be reviewed.
Does the Neles M-series manual actuator require frequent maintenance, and what should be checked after installation?
The series uses a cast iron housing, metal gears, and bearings, and is factory-filled with lifetime lubricant, resulting in low maintenance requirements. During installation and operation, verify ISO 5211 interface compatibility and confirm that the output torque meets the valve requirements. Correctly adjust the fully open and fully closed travel stops, and use the position indicator to verify the valve position during site operation.