The Neles X Series modular trunnion-mounted ball valve is a flanged, full-port, trunnion-mounted ball valve with a two-piece eccentric split body. Covering nominal sizes DN 50–600, the valve provides high Cv values and a self-flushing trim design. It can be configured with Q-trim or Q2-trim anti-cavitation, noise-attenuating trim and complies with ISO 15848 fugitive emissions, API 607 fire-safe, and SIL 3 functional safety standards. It is suitable for anti-cavitation and noise attenuation in high-pressure-drop process control, gas system control, low-emission control in chemical process pipelines, and emergency shutdown safety systems in industrial plants.
Neles X Series Modular Trunnion-Mounted Ball Valve
Neles
Neles X Series Modular Trunnion-Mounted Ball Valve
Modular trunnion-mounted ball valve for process control, with optional Q-trim trim.
- Category
- Ball Valves
- Nominal size range
- DN 50–600 / NPS 2"–24"
- Pressure rating
- EN PN 10–40, ASME 150–300
Specifications
- Valve design
- Flanged, trunnion-mounted, full-port ball valve
- Body design
- Two-piece eccentric split body
- Nominal size range
- DN 50–600 / NPS 2"–24"
- Pressure rating
- EN PN 10–40, ASME 150–300
- Operating temperature range
- -50 to +600 °C / -60 to +1110 °F
- Design standards
- ASME B16.34, API 608, API 6D (available upon request)
- Face-to-face standard
- ASME B16.10
- Seat type
- Metal-to-metal or soft seat
- Stem design
- Blowout-proof stem; robust stem-to-ball connection
- Control trim
- Q-trim anti-cavitation and noise-attenuating trim; Q2-trim for gas applications
- Flow characteristics
- High Cv values
- Trim design
- Self-flushing design
- Low-emission standard
- ISO 15848
- Fire-safe certification
- API 607
- Functional safety level
- SIL 3
Application scenarios
Anti-cavitation and noise attenuation in high-pressure-drop process control
Q-trim anti-cavitation and noise-attenuating trim can be configured for process control points where cavitation and flow noise must be suppressed.
Noise-attenuating control in natural gas and industrial gas systems
The valve can be used in transportation and processing systems for natural gas and other gaseous media, with the Q2-trim option enhancing gas noise attenuation.
Emergency shutdown safety systems in industrial plants
The valve can be used as a shutdown or emergency shutdown valve in industrial plants. It provides SIL 3 functional safety, API 607 fire-safe certification, and a blowout-proof stem design.
Low-emission safety control in chemical and petrochemical process pipelines
The valve can be used in process pipelines in chemical and petrochemical plants. It complies with the ISO 15848 low-emission standard and provides API 607 fire-safe certification.
Selection points
Trunnion-mounted models use a robust stem-to-ball connection
The trunnion-mounted models in the X Series use a robust stem-to-ball connection, helping maintain a reliable connection between the stem and ball.
Select metal or soft seats according to operating conditions
The product is available with metal-to-metal or soft seats. The seat can be selected according to the specific application conditions to meet long-term sealing performance requirements.
Optional Q-trim and Q2-trim control trim
The product can be equipped with Q-trim anti-cavitation and noise-attenuating trim. Q2-trim is intended for gas applications, allowing the trim configuration to be matched to application requirements.
Self-flushing trim design
The product uses a self-flushing trim design, helping reduce the accumulation of media in the trim area.
Low-emission, fire-safe, and functional safety features
The product complies with the ISO 15848 low-emission standard, provides API 607 fire-safe certification, and achieves SIL 3 functional safety.
Installation notes
Flange alignment and control of piping loads
During installation, correctly align the pipe flanges on both sides according to the valve's actual flange connection specifications. Prevent eccentric piping, external forces, or piping weight from imposing additional loads on the valve body or flange connections.
FAQ
What design does the Neles X Series modular trunnion-mounted ball valve use, and what control requirements is it suitable for?
The series uses a flanged, trunnion-mounted, full-port design with a robust stem-to-ball connection, making it suitable for control and tight shutoff applications. Its high-Cv design meets high-flow requirements, and Neles Q-trim anti-cavitation and noise-attenuating trim can be configured for control applications.
How should the seat of a Neles X Series ball valve be selected?
The seat should be selected based on the medium, temperature, pressure, and sealing requirements. The series is available with metal-to-metal or soft seats. Matching the seat to the application conditions helps provide long-term, stable sealing performance. The specific configuration must be confirmed according to the actual model and application conditions.
Can Neles X Series ball valves be used for high-noise gas service or liquid cavitation conditions?
Yes. For control applications, Neles Q-trim technology can provide anti-cavitation and noise-attenuation performance. For gas applications, Neles Q2-trim can be selected to improve gas noise attenuation. The noise-attenuating trim uses a self-flushing design, and the specific trim configuration must be confirmed according to the actual operating conditions.
What size, pressure, and temperature ranges are available for Neles X Series ball valves?
The size range for the trunnion-mounted full-port models is DN 50 to DN 600, or NPS 2" to 24". Pressure ratings cover EN PN 10 to PN 40 and ASME Class 150 to Class 300. The temperature range is -50 to +600 °C. The series also lists a temperature range of -60 to +1110 °F. Selection should be based on the actual model, seat, and material configuration.
What safety, emissions, and maintenance features do Neles X Series ball valves provide?
The series uses a blowout-proof stem, a two-piece eccentric split body, and a solid circular body connection gasket. It complies with ISO 15848 low-emission requirements, is fire-safe certified in accordance with API 607, and provides SIL 3 functional safety. The modular component design helps reduce the spare-parts inventory required for maintenance and is suitable for high-cycle operation and emergency shutdown applications such as ESD/ESV.