FUSION WELD HEADS

KNAACK BOX PORTABLE JOB BOXES

Critical Systems can ship your welding equipment in a KNAACK Box model KN44. Critical Systems can equip the units with all the equipment necessary to start orbital welding. This includes a CSI custom purge control panel, gas regulator stick, and magnehelic.

COOLANT SYSTEM

Critical Systems has a fleet of standard AMI chilling units for rent or purchase. Additionally Critical Systems has designed a superior chilling unit. Like the AMI chiller the unit can be used with either the M217 or M207. However, we made some improvements to the design and concept as seen below:

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AMI Weld Head Upgrade

CSI Designed Innovations for Ease of Use, Improved Quality, and Increased Productivity in Orbital Welding

Orbital Weld Head Extended Life Upgrade

Home Pin Solution cut sheet

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OUR INVENTORY INCLUDES:

1’ adapters
15’ adapters
50’ extensions with coolant lines for use with weld head chilling systems.
50’ extensions without coolant lines for use without chilling systems

Adapters & Extensions

Critical Systems maintains a full line of adapters and weld head extensions. We have extensions that can either be rented or purchased.

9-7500 Orbital Fusion Weld Head

Precision Orbital Welding for Pipes and Tubes

The 9-7500 Orbital Fusion Weld Head is designed for welding of pipes and tubes, offering exceptional precision and reliability.

Suitable for a variety of applications, it supports diameters from 1.0" to 7.5" with narrow-clearance areas. This model is ideal for high-quality welds in sectors including semiconductor manufacturing, aerospace, and food processing, ensuring consistent results.

Download the 9-7500 Orbital Fusion Weld Head fact sheet for detailed specifications.

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9-4500 Orbital Fusion Weld Head

Precision Welding for Large-Diameter Tubes & Pipes

The 9-4500 Orbital Fusion Weld Head is designed for precision welding of larger tube and pipe diameters, making it an ideal solution for high-purity and high-performance applications.

This robust weld head accommodates an outer diameter range from 2 inches to 9 inches, enabling seamless welding for thicker materials and large-scale projects. Its advanced clamping system ensures stability and precision, while the water-cooled design enhances performance in continuous-duty cycles.

Download the 9-4500 Orbital Fusion Weld Head fact sheet for detailed specifications.

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9-3500 Orbital Fusion Weld Head

High-Performance Weld Head for Large-Diameter Pipes

The 9-3500 Orbital Fusion Weld Head is engineered for large-diameter tube and pipe welding, providing robust and reliable performance for industrial applications.

Designed to handle diameters ranging from 3.5” (89 mm) to 14” (355 mm), it delivers high-quality fusion welds, even in demanding environments. The model incorporates advanced features such as precision arc voltage control (AVC) and water-cooled electrodes, ensuring consistent weld quality across varied wall thicknesses.

Download the 9-3500 Orbital Fusion Weld Head fact sheet for detailed specifications.

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AMI Model M9-2500 Fusion Weld Head

Precision Welding for Large-Diameter Pipes & Fittings

The AMI Model M9-2500 Fusion Weld Head is expertly engineered for orbital TIG welding, catering specifically to large-diameter pipes and tube fittings.

Its precision two-sided clamping mechanism ensures strong, consistent welds, even with significant diameter variances. The weld head supports pipe sizes ranging from 2.00" to 6.625" (51 mm to 169 mm) in outside diameter, making it suitable for demanding applications and industries such as aerospace, biopharmaceuticals, and power generation.

Download the AMI Model M9-2500 fact sheet for detailed specifications.

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AMI Model 9-1500 Fusion Weld Head

Precision Welding for Tubes and Thin-Walled Pipes

The AMI Model 9-1500 Fusion Weld Head is engineered for superior orbital welding of tubes and thin-walled pipes.

It accommodates an outside diameter range of 0.25” to 1.50” (6.35 to 38.1 mm), making it ideal for a wide variety of industrial applications, including pharmaceutical, food processing, and aerospace. The compact design ensures excellent performance in confined spaces, while its precision clamping mechanism guarantees secure fits and accurate welds.

Download the AMI Model 9-1500 Fusion Weld Head fact sheet for detailed specifications.

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AMI Model 9-750 Orbital Weld Head

Precision Orbital Welding for Tubes and Thin-Wall Pipes

The AMI Model 9-750 Orbital Weld Head is engineered for the precision welding of tubes and thin-wall pipes, offering a versatile solution for industries requiring high-quality automated welding.

With its compact design and durable construction, this weld head is ideal for tight spaces and demanding environments. It accommodates a range of pipe diameters and features a dual-clamp mechanism that ensures secure placement during welding.

Download the AMI Model 9-750 fact sheet for detailed specifications.

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AMI M9-500 Weld Head

Precision Welding for Large Pipes and Tubes in Tight Spaces

The AMI M9-500 weld head is engineered for precision orbital fusion (TIG) welding, suitable for applications ranging from small tube welding to heavy-duty tasks.

It accommodates pipe diameters of 0.5” to 4.094” (12.7 mm to 104 mm), ensuring versatility across a wide range of industrial welding needs. With its water-cooled design, the M9-500 is equipped to handle high duty-cycle operations, making it ideal for demanding environments.

Download the AMI M9-500 Weld Head fact sheet for detailed specifications.

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Model 8-6625 Orbital Weld Head

Precision Welding for Large Pipes and Tubes in Tight Spaces

The Model 8-6625 Orbital Weld Head is engineered for precision TIG (fusion) welding of larger pipes and tubes, accommodating diameters from 2.5" to 6.625".

Designed to perform in restricted spaces, this versatile weld head provides exceptional weld quality even in tight-fitting applications. Its dual clamping mechanism ensures a secure grip on the pipe while maintaining optimal alignment for precise welds.

Download the Model 8-6625 Orbital Weld Head fact sheet for detailed specifications.

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Model 8-4000 Orbital Weld Head

Precision Fusion Welding for Tubes and Thin-Wall Pipes

The Model 8-4000 Orbital Weld Head is engineered for the fusion welding of tubes, thin-wall pipes, and fittings with diameters ranging from 0.5" to 4.094" (12.7 mm to 104 mm).

Designed for challenging welding environments, its narrow head allows for precision fitting-to-fitting welds, even in limited-clearance situations. With water-cooling capabilities, it is well-suited for heavy-wall materials and high-duty cycle requirements, ensuring reliable performance during demanding operations.

Download the Model 8-4000 Orbital Weld Head fact sheet for detailed specifications.

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AMI 8-2000 Orbital Fusion Weld Head

Precise, High-Quality Orbital Welding for Tight Clearances

The AMI 8-2000 Orbital Fusion Weld Head is engineered to deliver precise, high-quality orbital welding for tubes and thin-wall pipes, with outside diameters ranging from 0.25" to 2.00" (6.35 mm to 52 mm).

Its compact design and narrow width make it perfect for fitting-to-fitting welds and other tight-clearance applications, while the two-sided clamping mechanism ensures positive clamping force and concentricity for consistent results. The weld head also features water-cooling capabilities, ideal for heavy-wall materials or high-duty cycles.

Download the AMI 8-2000 Orbital Fusion Weld Head fact sheet for detailed specifications.

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8 series

9 series

WELD HEADS

9-7500 Orbital Fusion Weld Head

9-4500 Orbital Fusion Weld Head

9-3500 Orbital Fusion Weld Head

9-2500 Orbital Fusion Weld Head

AMI 9-1500 Orbital Fusion Weld Head

AMI 9-750 Orbital Fusion Weld Head

AMI 9-500 Orbital Fusion Weld Head

AMI 8-6625 Orbital Fusion Weld Head

AMI 8-4000 Orbital Fusion Weld Head

AMI 8-2000 Orbital Fusion Weld Head

Spec Sheets

Critical Systems offers a full line of AMI orbital fusion weld heads. Our weld heads undergo a thorough maintenance program and are evaluated, inspected, and tested after every rental. Our weld heads can either be rented or purchased. Our equipment inventory includes: