Neles Omega GM Series severe service globe valves are control valves designed for demanding processes involving high pressure drops, cryogenic temperatures, and low-emission requirements. The series supports flanged and welded connections, with an operating temperature range from -200 to +593 °C. It provides SIL 3 safety integrity and complies with the ISO 15848 low-emission standard. Available with Omega multi-stage trim and bellows seal options, these valves are suitable for high-pressure-drop fluid flow control, cryogenic process line control, and low-emission control systems for severe media.
Neles Omega globe valve, GM Series
Neles
Neles Omega GM Series Severe Service Globe Valves
Globe valves with multi-stage trim for high-pressure-drop flow control, with optional bellows seal.
- Category
- Globe Valves
- Size Range
- DN 25 - 900 / 1" - 36"
- Pressure Rating
- ASME 150 – 2500 / PN10 – 320 / JIS 10K – 20K
Specifications
- Valve Body Design
- Unbalanced, top-guided; balanced, cage-guided
- Size Range
- DN 25 - 900 / 1" - 36"
- Pressure Rating
- ASME 150 – 2500 / PN10 – 320 / JIS 10K – 20K
- Operating Temperature Range
- -200 to +593 °C / -320 to +1053 °F
- Shutoff Class
- ANSI/FCI 70-2 Class IV / V (metal seat); Class V (soft seat, balanced); Class VI (soft seat, unbalanced)
- End Connections
- Flanged ends, welded ends
- Trim Design
- Omega multi-stage stacked-disc trim; top-guided or heavy-duty cage-guided
- Trim Stages
- Multi-stage trim available
- Trim Material Treatment
- Hardened trim surfaces as standard
- Low-Emission Standard
- ISO 15848
- Safety Integrity Level
- SIL 3
- Fire-Safe Certification
- API 607
- Material Options
- NACE material options available
- Special Cleaning Options
- Oxygen-service cleaning and cryogenic-service cleaning available
- Bellows Seal Option
- Bellows seal available
Application scenarios
Process fluid flow control under high pressure differentials
For control loops requiring stable process fluid flow regulation where high pressure differentials, noise, or cavitation pose a risk. The GM Series can be equipped with optional Omega multistage plug-stack trim, which reduces noise or cavitation through staged pressure reduction, and works with an actuator and valve controller to provide precise flow control.
Cryogenic process pipeline control
For flow regulation in cryogenic process pipelines. The GM Series operates at temperatures as low as -200 °C and offers clean-service options for cryogenic applications, meeting process requirements for valve temperature resistance and cleanliness.
Low-emission control for demanding media
For demanding media applications where valve external leakage control is required. The GM Series complies with ISO 15848 low-emission requirements and can be equipped with bellows packing and NACE materials to meet specific low-emission and material compatibility requirements.
Selection points
Omega multistage plug-stack trim
Uses Omega multistage plug-stack trim for demanding control applications where noise or cavitation must be controlled.
Balanced and unbalanced guiding structure options
Offers a choice of unbalanced top-guided construction or balanced valve body and trim construction with cage guiding.
Wide temperature range
Operating temperature range from -200 to +593 °C, suitable for applications ranging from cryogenic to high-temperature service.
Low emissions, functional safety, and fire protection certifications
Complies with ISO 15848 low-emission requirements, provides SIL 3 safety integrity level capability, and has API 607 fire-safe certification.
Maintenance without pipeline removal
Components can be replaced without removing the valve from the pipeline, simplifying maintenance.
Installation notes
Verify Oxygen or Cryogenic-Service Cleaning Configuration
For oxygen or cryogenic service, confirm before installation that the valve is configured with the applicable oxygen-service or cryogenic-service cleaning option.
FAQ
How do Neles Omega GM Series globe valves reduce noise and cavitation risk in high-pressure-drop applications?
The GM Series uses Omega multi-stage stacked-disc trim technology to handle high-pressure-drop applications through staged pressure reduction, helping suppress noise or cavitation. The valves are available with different trim capacities, flow characteristics, and numbers of stages to optimize performance based on actual pressure drop, process medium, and control requirements.
How should an unbalanced top-guided or balanced cage-guided design be selected for GM Series globe valves?
The GM Series offers unbalanced top-guided and heavy-duty balanced cage-guided designs. Selection should consider the required shutoff class, flow control requirements, pressure drop, process medium conditions, and actuator configuration. Metal seats can meet ANSI/FCI 70-2 Class IV or V, while soft seats can achieve Class V in balanced designs and Class VI in unbalanced designs. Specific configurations must be confirmed according to the actual model and application conditions.
What industrial processes and media applications are suitable for the Neles Omega GM Series?
The series is suitable for demanding control loops requiring stable process control and management of noise or cavitation. It can be used in oil and gas production, petrochemical, chemical, power generation, pulp and paper, industrial gas, and LNG applications. Its temperature range is -200 to +593 °C, with multiple material options, flanged or welded valve bodies, and special cleaning options for oxygen and cryogenic service.
Does GM Series globe valve maintenance require removing the valve from the pipeline?
The GM Series features a top-entry design and quick-change trim, so components can generally be replaced without removing the valve from the pipeline. Its one-piece valve body reduces potential leak paths, while robust top-guided or heavy-duty cage-guided trim and standard hardened surfaces help extend service life and reduce maintenance requirements.
What low-emission and safety-related configurations are available for GM Series globe valves?
The GM Series complies with ISO 15848 low-emission requirements and is available with a bellows seal. It also offers NACE material options, SIL 3 certification, and API 607 fire-safe certification. Special cleaning configurations are available for oxygen, cryogenic, and other special services. Specific configurations must be confirmed according to the actual model and application conditions.