Heat Sink Carbon Dioxide Regulator - Set Pressure 400kPa with Flowmeter 0-25lpm Rear Entry Type 30

The Bulgin® Heat Sink Carbon Dioxide Regulator is a professional-grade CO2 shielding gas regulator designed to provide accurate, consistent gas flow for MIG welding and industrial applications.

Featuring a fixed 400 kPa delivery pressure and an integrated adjustable 0–25 L/min flowmeter, the regulator provides precise shielding gas flow control to support stable welding performance and consistent weld quality.

Manufactured with a distinctive aluminium fin-style heat sink body, the regulator uses ambient air to help counteract cooling during pressure reduction, reducing the risk of freezing associated with 100% CO2 and high-CO2 shielding gas mixtures.

The regulator incorporates a rear-entry Type 30 cylinder connection, integrated safety features and a protective pressure gauge cover, making it suitable for professional workshops, fabrication and industrial environments.

Key Features

• Fixed 400 kPa delivery pressure for consistent gas supply

• Integrated adjustable 0–25 L/min flowmeter for precise shielding gas control

• Aluminium fin-style heat sink construction to help prevent regulator freezing

• Designed for 100% CO2 and high-CO2 shielding gas mixtures

• Stable and consistent gas delivery for MIG welding

• High-grade machined aluminium body

• Rear-entry Type 30 cylinder connection to AS 2473.2

• Cylinder pressure gauge with protective cover

• Integrated pressure relief valve for additional safety

• Sintered inlet filter to help prevent contamination

• Colour-coded for clear gas identification

• Conforms to Australian Standard AS 4267

• Limited 5-Year Warranty

Heat Sink Technology – Reduced Freezing

Carbon dioxide undergoes significant cooling during pressure reduction, which can cause conventional regulators to freeze during sustained or high-flow operation.

The Bulgin Heat Sink Regulator incorporates an aluminium fin-style body designed to increase the surface area exposed to ambient air.

This allows heat from the surrounding environment to transfer into the regulator, helping counteract the cooling effect of CO2 pressure reduction and maintain consistent gas delivery.

The heat sink design supports continuous CO2 flow of up to 100 L/min at 10°C ambient temperature, subject to operating conditions, helping minimise interruptions caused by regulator freezing.

Fixed Pressure with Precision Flowmeter Control

Unlike adjustable-pressure flowgauge regulators, this model incorporates a factory-set 400 kPa delivery pressure combined with an integrated flowmeter for direct shielding gas flow adjustment.

The 0–25 L/min flowmeter allows operators to visually monitor and adjust gas flow according to the welding process and application.

This configuration provides:

• Consistent regulated delivery pressure

• Direct visual indication of shielding gas flow

• Convenient adjustment of gas flow at the flowmeter

• Repeatable shielding gas settings for welding applications

The flowmeter is calibrated for CO2 and is intended for use with compatible gas equipment.

Typical Applications

• MIG welding using 100% CO2 shielding gas

• MIG welding using high-CO2 shielding gas mixtures

• Steel fabrication and manufacturing

• Industrial welding workshops

• Maintenance and repair

• General engineering and metalworking

• Compatible industrial shielding gas applications

Technical Specifications

Designed for Professional CO2 Welding Applications

The combination of fixed 400 kPa pressure regulation, precision flowmeter adjustment, aluminium heat sink technology and integrated safety features makes the Bulgin CO2 Heat Sink Regulator a practical solution for professional welding environments.

Designed to maintain reliable shielding gas delivery while reducing the risk of freezing, the regulator supports consistent welding performance across demanding workshop and industrial applications.

Note: The flowmeter is calibrated for CO2 and should only be used with compatible shielding gases and equipment. Actual flow performance and resistance to freezing will depend on ambient temperature, cylinder conditions, gas composition and operating demand. Ensure the regulator is correctly connected and operated within its specified pressure and temperature ratings.