The Neles GB series cage-guided globe control valve features a balanced, cage-guided design and can be equipped with multi-hole Tendril trim to reduce noise or eliminate cavitation. It offers SIL 3 safety integrity level and complies with the ISO 15848 low fugitive emissions standard. Suitable for wide-temperature and high-pressure service from -200 to +593 °C, the valve is used for flow control in oil and gas process lines, power plant steam and feedwater control, and LNG cryogenic process control.
Neles cage-guided globe control valve, GB series
Neles
GB Series Balanced Cage-Guided Globe Control Valve | Neles
Product code: GB
Balanced cage-guided globe control valve for flow control in oil and gas, power plant steam, and LNG cryogenic processes, with optional multi-hole Tendril trim for noise reduction and cavitation elimination.
- Category
- Globe Valves
- Nominal size range
- DN 50 - 900 / 2" - 36"
- Pressure class
- ASME 150 – 2500 / PN10 – 320 / JIS 10K – 20K
Specifications
- Valve design
- Balanced, cage-guided globe control valve
- Nominal size range
- DN 50 - 900 / 2" - 36"
- Pressure class
- ASME 150 – 2500 / PN10 – 320 / JIS 10K – 20K
- Operating temperature range
- -200 to +593 °C / -320 to +1053 °F
- Leakage class
- ANSI/FCI 70-2 Class IV/Class V (metal seat) and Class V (soft seat)
- End connections
- Flanged, welded ends
- Trim type
- Heavy-duty cage-guided trim with hardened trim surfaces as standard
- Flow characteristic
- Various trim capacities and flow characteristics available
- Noise and cavitation control
- Multi-hole Tendril trim for noise reduction or cavitation elimination
- Low fugitive emissions standard
- ISO 15848
- Packing options
- Optional bellows seal packing
- Material compatibility options
- NACE material options available
- Safety integrity level
- SIL 3
- Fire-safe certification
- API 607
- Special cleaning options
- Optional cleaning for oxygen and cryogenic service
Application scenarios
Flow control in oil and gas process pipelines
Used for flow control in oil and gas and petrochemical process pipelines. The GB Series supports precise flow control and offers NACE material options and ISO 15848 low-emission configurations for selection according to operating conditions.
Steam and feedwater control in power plants
Used for control in process pipelines such as power plant steam and feedwater systems. The GB Series uses a balanced cage-guided design and heavy-duty cage-guided valve trim to provide stable and precise flow control.
Cryogenic process control for LNG
Used for flow control in LNG cryogenic media processes. The valve supports operating temperatures as low as -200 °C and can be configured with special cleaning for cryogenic service, bellows packing and ISO 15848 low-emission options.
Selection points
Balanced heavy-duty cage-guided trim
The GB Series uses balanced, heavy-duty cage-guided trim. Product documentation explicitly supports this configuration, making it suitable for applications where control stability and trim durability are important.
Noise and cavitation reduction with multi-hole Tendril trim
The valve can be equipped with optional multi-hole Tendril trim to reduce noise or eliminate cavitation, making it suitable for applications with high pressure drops or noise and cavitation risks.
Trim maintenance without pipeline removal
The valve does not need to be removed from the pipeline when components are replaced, helping reduce piping disassembly work and simplify maintenance.
ISO 15848 low emissions and bellows seal packing options
The product complies with ISO 15848 low-emission requirements and can be equipped with bellows seal packing, making it suitable for applications requiring control of fugitive emissions around the valve stem.
Configurations for severe media and safety compliance
The product offers NACE material options, special cleaning options for oxygen and cryogenic service, SIL 3 safety integrity, and API 607 fire-safe certification, supporting selection reviews for relevant media and safety compliance requirements.
Installation notes
Allow sufficient overhead maintenance clearance
During installation, provide sufficient operating and disassembly space above the valve so that internal trim and related components can be replaced while the valve body remains connected to the pipeline.
Confirm special cleaning for specific services
For oxygen or cryogenic service, confirm before installation that the valve has been configured with the appropriate special cleaning.
FAQ
How does the Neles GB series cage-guided globe control valve achieve stable, precise flow control?
The GB series features a balanced, cage-guided design and can be equipped with Neles diaphragm or piston actuators and valve controllers. A variety of trim capacities and flow characteristics are available to match different control requirements, supporting stable and precise process flow control.
How should the GB series be selected for control services with high differential pressure that are prone to noise or cavitation?
For services with a risk of noise or cavitation, the multi-hole Tendril trim can be considered, as it is designed to reduce noise or eliminate cavitation. Selection should also confirm the specific configuration based on the actual size, pressure class, temperature range, flow capacity, flow characteristic, seat leakage class, and media conditions.
What sizes, pressure classes, and temperature ranges does the Neles GB series cover?
The GB series covers sizes from DN 50 to DN 900 (2 to 36 inches); pressure classes from ASME 150 to 2500, PN10 to PN320, and JIS 10K to 20K; and temperatures from -200 to +593 °C. The specific configuration must be confirmed based on the actual model and application conditions.
What maintenance convenience and long-term operating advantages does the GB series offer?
The series features a top-entry design and quickly replaceable trim, so components can be replaced without removing the valve from the pipeline. The one-piece body reduces leakage paths, and the heavy-duty cage-guided trim features hardened surfaces as standard, helping to extend service life and reduce maintenance requirements.
What options does the GB series offer for fugitive emissions, safety, and special media services?
The GB series complies with ISO 15848 low fugitive emissions requirements and can be equipped with optional bellows seal packing. NACE material options, SIL 3 certification, and configurations related to API 607 fire-safe certification are also available. For oxygen, cryogenic, and other special services, appropriate special cleaning configurations can be selected; applicability must be confirmed based on the actual model and application conditions.