D-Head 420 Welding Head

RANGE: 0.84 - 14" / 21.34 - 355.60 mm OD

  • Function: multi-pass orbital GTAW pipe-to-pipe, pipe-to-fitting
  • Materials: carbon-based and exotic alloys
  • Power supply compatibility: Pipemaster 515 and Pipemaster 516

The Magnatech D-Head 420 weld head is designed to make pipe-to-pipe and pipe-to-fittings welds. It reproduces all required functions, motions, and flexibility of highly skilled manual welding, reduces repair rates, while offering high repeatability and efficiency. The D-Head 420’s key differentiator is its ability to be used on applications with radial and axial clearance constraints. The minimum required clearance is 2″ / 51 mm, making it a unique weld head for particular applications across various industries. The D-Head is positioned on the pipe using interchangeable guide rings (standard 24 guide ring sizes are available). Guide ring insert kits can be used allowing to cover the diameter range of 0.84 – 14″ / 21.34 – 355.60 mm o/d.

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MAIN FEATURES

TORCH OSCILLATION (WEAVING)

Customize welds with precision: independently program the width, speed, and endpoint “dwell” of the torch oscillation. Control the torch’s “cross seam” steering electronically via a remote pendant, and benefit from pulsed current automatically synchronized with the oscillation for flawless results.

FILLER WIRE SPOOL

Supports standard 1 kg / 2 lbs spools or 0.5 kg / 1 lbs low-profile spool for a reduced radial footprint, enhancing maneuverability in tight spaces.

COMPACT HEAD-MOUNTED WIRE FEEDER

Handles a variety of wire diameters with ease, ensuring flexibility and efficiency in every weld.

WELDING HEAD MOUNTING/ROTATION

Heavy-duty metal guide rings lock the head firmly onto the pipe. The rugged sprocket drive system provides steady rotation speed, guaranteeing consistent and precise welds every time.

USE ON PREHEATED PIPES

Engineered for extreme conditions, the D-Head 420’s heat-tolerant components and water-cooled housing make it perfect for welding alloys that require preheating. Tackle high-temperature applications with confidence and precision.

ARC GAP CONTROL (aGC)

AGC allows real-time control of the distance between the electrode and the workpiece by maintaining the gap rather than just the voltage alone, ensuring consistent and precise welding performance.

3-AXIS ADJUSTABLE FILLER WIRE NOZZLE

Achieve exact positioning of the filler wire entry into the weld puddle with multiple adjustment options, allowing for precise control and optimal weld quality.

Every D-Head 420 welding head comes fully equipped for convenience and optimal weld performance. Includes:

  • A complete wire size kit ranging from 0.020″ (0.5 mm) to 0.045″ (1.2 mm)
  • Durable wire conduits
  • Standard spool kit
  • Low-profile spool kit
  • All required accessories to operate the head
  • Tool kit for mechanical adjustment
  • Miscellaneous screw package
  • All securely packed in a rugged, heavy-duty storage case for maximum protection and portability.

REQUIRED ACCESSORIES

Guide rings are available in 24 standard sizes. The guide rings are used to fix the welding head around the pipe and to allow accurate rotation of the head around it. It consists of two hinged segments that close around the pipe and latch together. Guide rings may be used on a smaller pipe diameter than what they are designed for by using insert kits (see the section below on guide ring insert kits).

PART NO. DESCRIPTION
103854-1750 Guide ring, chain / link kit, 1.75″ tube, 1.750″ / 44.45 mm
103854-1900 Guide ring, chain / link kit, 1.5″ pipe, 1.900″ / 48.26 mm
103854-2000 Guide ring, chain / link kit, 2″ tube, 2.000″ / 50.80 mm
103854-2125 Guide ring, chain / link kit, 2.125″ tube, 2.125″ / 53.975 mm
103854-2250 Guide ring, chain / link kit, 2.25″ tube, 2.250″ / 57.15 mm
103854-2375 Guide ring, chain / link kit, 2″ pipe, 2.375″ / 60.33 mm
103854-2500 Guide ring, chain / link kit, 2.5″ tube, 2.500″ / 63.50 mm
103854-2875 Guide ring, chain / link kit, 2.5″ pipe, 2.875″ / 73.025 mm
103854-3000 Guide ring, chain / link kit, 3″ tube, 3.000″ / 76.20 mm
103854-3250 Guide ring, chain/link kit, 3.25″ tube, 3.250″ / 82.55 mm
103854-3500 Guide ring, chain / link kit, 3″ pipe, 3.500″ / 88.90 mm
103854-4000 Guide ring, chain / link kit, 4″ tube, 4.000″ / 101.60 mm
103854-4500 Guide ring, chain / link kit, 4″ pipe, 4.500″ / 114.30 mm
103854-5000 Guide ring, chain / link kit, 5″ tube, 5.000″ / 127.00 mm
103854-5563 Guide ring, chain / link kit, 5″ pipe, 5.563″ / 141.30 mm
103854-6000 Guide ring, chain / link kit, 6″ tube, 6.000″ / 152.40 mm
103854-6625 Guide ring, chain / link kit, 6″ pipe, 6.625″ / 168.275 mm
103853-7250 Guide ring, chain / link kit, 7.25″ tube, 7.250″ / 184.15 mm
103853-7750 Guide ring, chain / link kit, 7.75″ tube, 7.750″ / 196.85 mm
103853-8000 Guide ring, chain / link kit, 8″ tube, 8.000″ / 203.20 mm
103853-8625 Guide ring, chain / link kit, 8″ pipe, 8.625″ / 219.075 mm
103853-10750 Guide ring, chain / link kit, 10″ pipe, 10.750″ / 273.05 mm
103853-12750 Guide ring, chain / link kit, 12″ pipe, 12.750″ / 323.85 mm
103853-14000 Guide ring, chain / link kit, 14″ pipe, 14.000″ / 355.60 mm

TECHNICAL SPECIFICATIONS

Pipe (tube) size range 0.84 – 14″ / 21.34 – 355.60 mm
Cable length 25′ / 7.6 m standard
Filler wire module – Wire size 0.020″, 0.030″, 0.035″, 0.040″, 0.045″ / 0.5, 0.8, 0.9, 1.0, 1.2 mm
Filler wire module – Max. speed capability 2540 mm/min. (100 IPM)
Filler wire module – Spool size 2 lbs / 1 kg standard; 1 lbs / 0.5 kg low profile
Oscillation module – Max. oscillation stroke amplitude 0.625″ / 16 mm
Oscillation module – Max. oscillation speed 1520 mm/min. (60 IPM)
Oscillation module – Oscillation dwell 0 – 1 second
Oscillation module -Cross seam adjustment 0.5″ (12.7 mm)
Arc gap control module 0.5″ / 12.7 mm stroke. Additional mechanical adjustment allows welding heavier wall pipe up to 1″ / 25.4 mm
Torch propulsion module 25.4 cm/min (10 IPM) maximum rotation speed
Water-cooled torch 200 A continuous capability
Torch adjustment capability – Torch lead/lag adjustment ± 15 degrees (manual)
Torch adjustment capability – Torch tilt adjustment ± 10 degrees (manual)
*For pipe/tube o/d’s less than 1.75″ / 44.45 mm, radial clearance requirement increases with decreasing diameter. Contact us for more information..

DIMENSIONS/WEIGHTS

Weight 8 lbs / 3.6 kg (not including the torch cable)
Axial clearance Torch center line to Rear Extremity: 8.51″ / 216.2 mm
Radial clearance Torch center line to Front Extremity: 0.41″ / 10.4 mm
Requirement 2.5″ / 63.5 mm with standard spool*
*For pipe/tube o/d’s less than 1.75″ / 44.45 mm, radial clearance requirement increases with decreasing diameter. Contact us for more information..

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