The Neles Neldisc L12 Series triple-eccentric butterfly valve is a wafer-style valve with a two-piece shaft design. It features an integral all-metal seal with built-in thermal and pressure compensation. Its flow characteristic is approximately equal-percentage, with a temperature range of -50 °C to +260 °C. It is suitable for industrial pipelines handling dirty or abrasive media, as well as flow throttling and shut-off in power generation facilities with continuously changing process conditions.
Neles butterfly valve, L12 Series
Neles
Neles Neldisc L12 Series Triple-Eccentric Butterfly Valve
Triple-eccentric butterfly valve with all-metal sealing for throttling and shut-off applications
- Category
- Butterfly Valves
- Connection sizes
- DN 80 - 1400, 3" - 56"
- Pressure ratings
- PN 10, 16, 25 and ANSI 150
Specifications
- Valve design
- Triple-eccentric, two-piece shaft design
- Connection type
- Wafer style
- Connection sizes
- DN 80 - 1400, 3" - 56"
- Pressure ratings
- PN 10, 16, 25 and ANSI 150
- Operating temperature range
- -50 °C … +260 °C / -60 °F…+500 °F
- Flow characteristic
- Approximately equal-percentage
- Sealing design
- Integral all-metal seal with no resilient components in the pipeline
- Compensation functions
- Built-in thermal and pressure compensation
Application scenarios
Throttling and shut-off in industrial pipelines handling dirty or abrasive media
Used for flow throttling and shut-off in industrial process pipelines handling dirty or abrasive media.
Process pipeline control in power generation
Used for flow throttling or shut-off in power generation process pipelines and for changing process conditions.
Selection points
Triple-eccentric and two-piece shaft design
The L12 Series uses a triple-eccentric design and a two-piece shaft configuration.
Integral all-metal seal with no resilient components
The L12 Series features an integral all-metal seal with no resilient components in the pipeline, making it suitable for applications involving dirty and abrasive media.
Built-in thermal and pressure compensation
The L12 Series incorporates thermal and pressure compensation to accommodate changing process conditions.
Approximately equal-percentage flow characteristic for throttling and shut-off
The L12 Series provides an approximately equal-percentage flow characteristic and is suitable for throttling and shut-off applications.
Wafer-style design with broad size and pressure-rating coverage
The L12 Series uses a wafer-style connection, covering connection sizes from DN 80 to 1400 and 3 to 56 inches, with pressure ratings including PN 10, PN 16, PN 25 and ANSI 150.
Installation notes
Wafer-style flange installation
The L12 Series uses a wafer-style connection. During installation, the valve must be positioned between the pipeline flanges on both sides.
FAQ
What are the key features of the sealing design of the Neles L12 Series triple-offset butterfly valve, and which applications with stringent sealing requirements is it suitable for?
The L12 Series features a triple-offset design, a two-piece shaft design and an integral all-metal seal, with no elastomeric components in the flow path. It also provides built-in thermal and pressure compensation. This design is intended to deliver high-level, long-life sealing performance and is suitable for demanding, continuously varying process control and shut-off applications. The specific configuration must be confirmed based on the actual model and application conditions.
Can L12 Series butterfly valves be used for both flow control and shut-off?
Yes. The Neles Neldisc L12 Series is designed for control and shut-off applications. It has an approximately equal-percentage flow characteristic to support process flow control, while its all-metal sealing design can meet the requirements of shut-off applications where high sealing performance is required.
Are Neles L12 butterfly valves suitable for media containing contaminants or abrasive particles?
The L12 Series is suitable for applications involving media containing contaminants and abrasive particles. The triple-offset design and integral all-metal seal help maintain stable operating performance under demanding media conditions. The particle characteristics, abrasiveness, temperature and pressure of the specific medium must be evaluated based on the actual model and application conditions.
Which pressure, temperature and size conditions should be checked when selecting the Neles L12 Series?
Selection should take into account the pipeline size, pressure class, medium temperature and the requirements for control or shut-off service. The L12 Series has a wafer-style design, a size range of DN 80 to DN 1400 (3 in to 56 in), pressure classes including PN 10, PN 16, PN 25 and ANSI 150, and a temperature range of -50 °C to +260 °C. The specific configuration must be confirmed based on the actual model and application conditions.
What benefits does the low-torque design of the L12 Series provide for actuators and piping systems?
The L12 Series minimizes actuator torque through its triple-offset design, allowing the use of smaller actuators and helping to reduce piping stress. The valve also provides high flow capacity, which can reduce process pressure drop and energy consumption. It is suitable for applications such as pulp and paper processing and power generation.