The Neles M series manual worm gear actuator is a handwheel-operated worm gear drive featuring a cast iron housing, ISO 5211 mounting standard, output torque of 330–8400 Nm, adjustable travel stops for both open and closed positions, and a fully enclosed weatherproof design. Suitable for outdoor or dusty industrial environments from -20 °C to +80 °C, it delivers high-torque manual operation for quarter-turn valves.
Neles M series manual actuator
Neles
M Series Manual Worm Gear Actuator | Neles
Product code: M
Handwheel-operated worm gear actuator providing high-torque manual operation for quarter-turn valves compliant with ISO 5211.
- 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 is the working principle of the Neles M series manual actuator, and is it suitable for valves requiring high manual operating torque?
The Neles M series uses a handwheel-driven worm gear mechanism that converts handwheel input into higher output torque. With an output torque range of 330 to 8400 Nm, it is suitable for applications that require high valve operating torque through manual operation. The specific configuration must be confirmed based on the actual model and application conditions.
What advantages does the Neles M series manual worm gear actuator offer compared to direct lever operation?
The series delivers higher output torque through its worm gear mechanism, offering easier operation than a lever handle and reducing the required installation space. The actuator is equipped with a high-visibility position indicator, and both the open and closed positions can be set via adjustable travel stops, which helps improve the controllability of manual valve operation.
How is the Neles M series manual actuator connected to valves and selected?
The Neles M series uses ISO 5211 mounting and can be applied to valves that meet the corresponding mounting interface requirements. When selecting the actuator, the key factors to verify are the valve's required operating torque, mounting interface, ambient temperature, and whether options such as a locking device, high-temperature version, marine version, buried-service version, or key drive are needed. The specific configuration must be confirmed based on the actual model and application conditions.
What ambient temperatures and site conditions can the Neles M series manual actuator handle?
The standard temperature range is -20 to +80 °C. The actuator features a fully enclosed, weatherproof design and is factory-filled with lifetime lubrication; options are also available for locking devices, high temperatures, marine applications, and buried service. For projects outside the standard temperature range or with special environmental requirements, verification should be based on the actual model and application conditions.
Does the Neles M series manual actuator require frequent maintenance, and what should be checked after installation?
The series features a cast iron housing, metal gears and bearings, and factory lifetime lubrication, resulting in low maintenance requirements. During installation and operation, verify that the ISO 5211 interface matches, confirm that the output torque meets the valve requirements, and properly adjust the fully open and fully closed travel stops; the position indicator can be used to confirm the valve position during on-site operation.