The Neles AB series cage-guided angle valve is a balanced control valve designed for high-pressure-drop applications. It covers nominal sizes DN 50-1200, supports pressure ratings up to PN320, and operates across a temperature range of -196 °C to +593 °C. The valve is supplied with hardened trim surfaces as standard and can be configured with Tendril multi-hole valve trim to reduce noise or eliminate cavitation. The product is SIL 3 certified and provides low fugitive emissions performance, making it suitable for flash media control loops in the petrochemical industry and cryogenic fluid control lines in LNG applications.
Neles cage-guided angle valve, AB series
Neles
Neles AB Series Cage-Guided Angle Valve (High Pressure Drop Applications)
Cage-guided angle valve for flashing applications, with optional Tendril valve trim
- Category
- Globe Valves
- Nominal size range
- DN 50 - 1200 / 2" - 48"
- Pressure rating
- ASME 150 – 2500 / PN10 – 320
Specifications
- Valve body design
- Angle-pattern, single-piece valve body
- Valve trim design
- Balanced, cage-guided
- Nominal size range
- DN 50 - 1200 / 2" - 48"
- Pressure rating
- ASME 150 – 2500 / PN10 – 320
- Operating temperature range
- -196 °C … +593 °C
- Seat leakage class
- ANSI/FCI 70-2 Class IV / V (metal seat) and Class V (soft seat)
- End connections
- Flanged or welded ends
- Valve trim capacity and flow characteristics
- Multiple valve trim capacities and flow characteristics available
- Noise reduction and anti-cavitation trim
- Multi-hole Tendril valve trim for noise reduction or cavitation elimination
- Valve trim surface treatment
- Heavy-duty cage-guided valve trim with hardened trim surfaces as standard
- Low fugitive emissions
- Compliant with ISO 15848; bellows packing available
- Material options
- NACE material options available
- Safety integrity level
- SIL 3 certified
- Special cleaning treatment
- Optional special cleaning treatment for oxygen and cryogenic applications
Application scenarios
Petrochemical Flashing Media Control Loops
Suitable for high pressure drop and high velocity control applications involving flashing in petrochemical plants. This series is designed for flashing service and space-constrained piping layouts, and can be configured with porous Tendril trim to reduce noise or eliminate cavitation.
LNG Cryogenic Fluid Control Lines
Suitable for cryogenic fluid control lines in LNG facilities. The operating temperature range extends down to -196 °C, with optional special cleaning for cryogenic service.
Selection points
Angle-Pattern, One-Piece Valve Body
Uses an angle-pattern, one-piece valve body design for piping control applications that require an angle configuration.
Maintenance Without Removing the Valve from the Pipeline
Components can be replaced without removing the valve from the pipeline, simplifying field maintenance and reducing disassembly work.
Balanced Cage-Guided Trim with Hardened Surfaces
Uses balanced cage-guided trim with hardened trim surfaces as standard, making it suitable for high pressure drop and high velocity applications.
Porous Tendril Noise-Reducing and Anti-Cavitation Trim
Can be configured with porous Tendril trim to reduce noise or eliminate cavitation.
Large-Diameter, Wide Pressure and Temperature Coverage
Nominal sizes range from DN 50 to 1200, pressure ratings cover ASME 150 to 2500 or PN10 to 320, and the operating temperature range is -196 °C to +593 °C.
Low Fugitive Emissions and NACE Material Options
Complies with ISO 15848 low fugitive emissions requirements and offers NACE material options.
Installation notes
Verify Special Cleaning for Oxygen or Cryogenic Service
For valves configured with optional special cleaning for oxygen or cryogenic service, verify the actual configuration before installation and maintain the applicable special cleaning requirements.
FAQ
What high-pressure-drop or high-velocity control applications are suitable for the Neles AB series cage-guided angle valve?
The Neles AB series is suitable for applications with high pressure drops, high flow velocities and demanding stable control requirements, particularly flashing applications and angle-pattern piping layouts where space is limited. Its angle-pattern body helps minimize contact between high-velocity media and the valve body and trim during flow through the valve, helping extend valve service life. The specific configuration must be confirmed based on the actual model and application conditions.
How does the AB series address noise and cavitation risks?
The series can be configured with multi-hole Tendril valve trim to reduce noise or eliminate cavitation. Multiple valve trim capacities and flow characteristics are also available, allowing performance to be optimized based on media flow rate, pressure drop and control requirements.
What are the pressure, temperature and size ranges of the Neles AB series?
The AB series covers sizes DN 50–1200 (2–48 inches), pressure ratings of ASME 150–2500 or PN10–320, and a temperature range of -196 °C to +593 °C. The actual usable range must be confirmed based on the valve body material, trim, sealing arrangement and specific operating conditions.
What design features of this angle valve can reduce maintenance requirements?
The AB series uses a top-entry design and quick-change valve trim, allowing components to be replaced without removing the valve from the pipeline. The heavy-duty cage-guided trim has hardened surfaces as standard, and the single-piece valve body reduces potential leakage paths, helping lower maintenance requirements and lifecycle maintenance costs.
What options are available for sealing, fugitive emissions and special applications in the AB series?
Metal seats can achieve ANSI/FCI 70-2 Class IV or Class V leakage performance, while soft seats provide Class V leakage performance. The valve complies with ISO 15848 low fugitive emissions requirements and can be equipped with bellows packing, NACE material options, and special cleaning treatment for oxygen, cryogenic and other demanding applications. The series is SIL 3 certified. The specific configuration must be confirmed based on the actual model and application conditions.