Bettis NG-Series Pneumatic Valve Actuator

The Bettis™ NG-Series Pneumatic Valve Actuator, developed by Emerson, is a high-performance, quarter-turn actuator designed to deliver powerful, reliable, and efficient valve automation for a wide range of industrial applications. Utilizing compressed air as its power source, the NG-Series provides smooth and precise rotary motion, making it ideal for operating ball, butterfly, and plug valves in onshore, offshore, and process environments.

Built on the proven rack-and-pinion principle, the Bettis NG-Series ensures consistent torque output, compact design, and long-term durability. Its modular construction simplifies maintenance, while corrosion-resistant materials make it suitable for use in harsh or corrosive atmospheres. The actuator can be configured as double-acting for bidirectional control or spring-return for fail-safe operation in critical applications.

Engineered for reliability and ease of integration, the Bettis NG-Series is compatible with a wide range of control accessories—including solenoid valves, limit switches, and positioners—making it a versatile solution for oil and gas, petrochemical, power generation, and water treatment industries.

Technical Specification of Bettis NG-Series Pneumatic Valve Actuator

Power Source

Pneumatic

Product Type

Pneumatic Actuator

Actuation

Fail-Safe, Quarter-turn, Spring-Return, Double-Acting

Certifications

Nuclear/Seismic

Control Type

On/off

Valve Type

Ball, Butterfly, and Plug Valves, Louvers and Dampers, and Other Quarter-Turn Devices

Operating Temperature

Standard range: -20°F to +200°F (-29°C to +93°C). Optional range: to -40°F (-40°C) or to +350°F (+177°C)

Torque/Thrust

Spring-return models in excess of 3,000,000 in-lbs (339,000 Nm)

Operating Pressure

40-220 psig (3-14 Bar)

Operating Pressure

Pneumatic 40-220 psig (3-14 Bar), Hydraulic up to 5,000 psig (345 Bar)

Feature of Bettis NG-Series Pneumatic Valve Actuator

• Independently tested to include LOCA (Loss of Cooling Accident), meets IEEE 382 standards, seismic, and various aging processes required to meet current nuclear qualification criteria.
• Suitable for use in demanding applications requiring SIL environment
• Patented Tension-Lok device positively locks the spring module to allow its safe removal and installation, eliminating accidental release of the spring force
• PED 97/23/EC compliant to meet the stringent requirements of pressure mounting vessels
• Meets both IP66 and IP67M specifications for submergence and high pressure water deluge test and offers superior water ingress and corrosion protection
• Offers multiple configurations, with a modular design that enables safe field maintenance and reduced inventory costs
• Interchangeable power and spring modules for quick reversal of the fail-safe mode
• Suitable for use in demanding applications requiring SIL environment
• Corrosion resistant, and internal and external surfaces are coated to protect in harsh environments
• Offers a variety of mechanical and manual overrides for G-Series models
• Adds an extra measure of versatility with its field serviceable modular configuration – it can be altered from a single acting to a double-acting and add a hydraulic manual override after installation
• Offers complete valve operating system (VOS) for final valve control by combining the G-Series actuator, controls and a valve in a singular system