The Neles X Series modular seat-supported ball valve is a flanged, two-piece eccentric split-body seat-supported ball valve available in full-port and reduced-port configurations. The valve complies with ASME, API, and ISO low-emission standards and provides SIL 3 functional safety and API 607 fire-safe certification. The operating temperature range is -200 to +600 °C. The product is equipped with anti-cavitation and noise-attenuating trim for control and isolation in applications such as high-temperature steam, low-emission safety-critical processes, and high-pressure-drop gas service.
Neles Modular Seat-Supported Ball Valve, X Series
Neles
Neles X Series Modular Seat-Supported Ball Valve
Seat-supported ball valve for high-temperature steam control, with optional metal seats
- Category
- Ball Valves
- Nominal Size Range
- DN 25 – 200 / NPS 1” – 8”
- Pressure Ratings
- EN PN 10 - 100, ASME 150 - 600
Specifications
- Connection Type
- Flanged
- Valve Design
- Two-piece eccentric split body, seat-supported ball valve
- Port Configuration
- Full-port and reduced-port
- Nominal Size Range
- DN 25 – 200 / NPS 1” – 8”
- Face-to-Face Standard
- ASME B16.10
- Design Standards
- ASME B16.34, API 608
- Pressure Ratings
- EN PN 10 - 100, ASME 150 - 600
- Operating Temperature Range
- -200 to +600 °C / -320 to +1110 °F
- Seat Type
- Metal-to-metal and soft seats
- Stem Safety Design
- Blowout-proof stem
- Low-Emission Standard
- ISO 15848
- Fire-Safe Certification
- API 607
- Functional Safety Level
- SIL 3
- Trim Function
- Anti-cavitation and noise attenuation
- Applicable Media
- Liquids, gases, and steam
Application scenarios
High-Temperature Steam Process Line Control and Isolation
Suitable for control and isolation in high-temperature steam process lines. Product documentation specifies suitability for steam service, an operating temperature of up to +600 °C, and metal-to-metal seat options for specific operating conditions.
Low-Emission Safety-Critical Process Lines
Suitable for liquid, gas, or steam process line valve positions where low emissions and functional safety are required. Product documentation specifies compliance with the ISO 15848 low-emission standard and SIL 3 functional safety.
High-Pressure-Drop Gas or Steam Control Service
Suitable for gas or steam control service requiring suppression of cavitation and flow noise. Product documentation specifies anti-cavitation and noise-attenuating trim, while Neles Q2-trim improves gas noise attenuation performance.
Selection points
Wide Temperature and Pressure Operating Range
The operating temperature range is -200 to +600 °C, with pressure ratings covering EN PN 10-100 and ASME 150-600.
Configurable Anti-Cavitation and Noise-Attenuating Trim
Neles Q-trim can be configured for anti-cavitation and noise attenuation; Neles Q2-trim is available for gas applications to improve gas noise attenuation performance.
Modular Soft-Seat and Metal-Seat Selection
Soft seats and metal-to-metal seats are available, allowing the seat configuration to be selected according to the specific application conditions.
Low-Emission and Blowout-Proof Stem Design
Complies with the ISO 15848 low-emission standard and uses a blowout-proof stem design.
SIL 3 Functional Safety and API 607 Fire-Safe Certification
Provides SIL 3 functional safety and complies with API 607 fire-safe certification requirements.
Installation notes
Verify Service Conditions Against the Actual Seat Configuration
Before installation, confirm from the nameplate and purchasing documents that the actual seat type matches the media, operating temperature, pressure, and other service conditions. This series can be configured with metal-to-metal or soft seats, and the applicable service conditions must be determined according to the actual seat configuration.
FAQ
What media and industrial services are Neles X Series modular seat-supported ball valves suitable for?
The Neles X Series is suitable for liquids, gases, steam, and hydrocarbons, and can be used in oil and gas production, chemical and petrochemical plants, power generation, LNG, and natural gas applications. Its applications also include high- and low-temperature service, catalyst transfer, solids handling, polymer service, high-frequency cycling, control, tight shutoff, and emergency shutdown (ESD/ESV) service. The specific configuration must be confirmed based on the actual model and application conditions.
How do Neles X Series ball valves provide both control performance and tight shutoff?
The series uses a robust stem-to-ball connection and allows the selection of metal-to-metal or soft seats according to the application conditions to support reliable long-term sealing. For control service, Neles Q-trim technology can be used to provide anti-cavitation and noise attenuation. The series is also suitable for control and tight shutoff applications.
What are the available sizes, pressure ratings, and temperature range of Neles X Series ball valves?
The series consists of flanged, seat-supported ball valves available in full-port and reduced-port configurations. The size range is DN 25–200 (NPS 1”–8”). Pressure ratings cover EN PN 10–100 and ASME Class 150–600, with a temperature range of -200 to +600 °C. Face-to-face dimensions comply with ASME B16.10, and design standards include ASME B16.34 and API 608.
How should Neles X Series ball valves be selected for high-temperature, low-temperature, or solids-containing media?
Selection should begin with identifying the media properties, temperature, pressure rating, whether control or tight shutoff is required, and whether cavitation, noise, solids, or high-frequency operation are present. The Neles X Series offers metal-to-metal or soft-seat options and multiple material selections according to the application. For control service, Neles Q-trim with anti-cavitation and noise-attenuation capabilities can be evaluated. The specific configuration must be confirmed based on the actual model and application conditions.
What design features of Neles X Series ball valves support maintainability and operating reliability?
The series features a two-piece eccentric split body, a solid circular body connection gasket, and a blowout-proof stem design. Its modular component design helps reduce the spare-parts inventory required for maintenance. The high-Cv design includes self-flushing-oriented noise-attenuating trim to support stable operation under demanding conditions. The series complies with ISO 15848 low-emission requirements, is fire-safe certified in accordance with API 607, and provides SIL 3 certification.