Magnatech Limited Partnership: Automatic Orbital Welding Equipment


TUBESHEET WELD HEADS Models 424, 425, 426 & 430 Orbital Weld Heads for Fusion/Filler Wire Welding of Tube-to-Tubesheets Use with Tubemaster Model 514A Power Source Pipemaster Model 515 Power Source (Model 425 only)
Precision Tools for Precise, Repeatable Welds
These Magnatech weld heads are specifically designed for making tube-to-tubesheet welds. Configured for fast and simple operation, the Head is inserted into the tube to be welded, and the operator pushes the START WELD switch. Multiple torch positioning adjustments allow virtually all tubesheet joint designs to be welded. All four models weld a wide range of tube sizes and operate in any position. For welds requiring filler wire addition, an optional wire feeder can be mounted on the weld head. A standard wire spool, mounted directly on the Head, provides precise and positive wire feeding, not possible with floor-mounted feeders. These weld Heads bring the productivity and repetitive precision of machine welding to the fabrication and repair of steam generators and heat exchangers. All three weld Heads models are used with Magnatech power sources, ranging form simple to operate analog models to microprocessor-based systems with program storage capability. TUBE GEOMETRIES Model 424 is ideal for all tubesheet geometries. Model 425 with AVC is for multipass welding Model 426 is ideal for fusion welding where preheat is not required Model 430 is ideal for fusion welding only and very light weight
Process:	GTAW, TIG

Weld Head Type:	Open arc

Tube Size Range:	Model 424: 10mm - 78mm (0.4" - 3.07") ID Model 425: 10mm - 140.2mm (0.4" - 5.52") ID Model 426: 10mm - 70.1mm (0.4" - 2.76") ID Model 430: 10mm - 26mm (0.4" - 1.02") ID

Functions:	Torch rotation, Arc length control (Model 425 only), Filler wire feed (Optional, except Model 430)

Features:	Water-cooled torch and weld Head body (models 425 & 426 only) allow use on pre-heated tubesheets Lifting eye allows use on a counterbalance for weightless operation Multiple torch angle and wire feed positioning mechanism allow optimum torch position and wire entry angle Simple centering cartridge design allows quick installation without requiring prior installation of expensive custom-fabricated locating fixtures Inexpensive centering cartridges fit the exact tube ID Filler wire spool rotates with the torch - eliminating wire entry problems common with floor-mounted feeders (Models 424 & 425) No cable wrap-up
Options:	Filler Wire feeder using standard 1kg (2lbs.) spools Three point standoff for welding "extended tube" geometries Transparent purge gas chamber for titanium floods the enclosed weld area independent of torch shielding gas, reducing purge time and weld oxidation Arc Voltage Control parallel to tungsten electrode - even when the torch is angled for a fillet weld Torches for internal bore welding Extension Cables Dual Head Switcher allows two Heads to be used alternately maximizing "arc on" duty cycle
Applications:	Aerospace Heat Exchangers Pharmaceutical Power Generation Hight Purity/Sanitary Chemical Food Process/Dairy Process Pipe

WELD HEAD/CONTROLLERS SPECIFICATIONS
Weld Head	Model 424	Model 425	Model 426	Model 430
Applications
Joint Design	Extended, Flush, Recessed and Internal Bore	Extended, Flush, Recessed and Internal Bore	Extended, Flush, Recessed and Internal Bore
Pitch Pattern	Triangular or Square	Triangular or Square)	Triangular or Square
Tube I.D. Size Range	10mm-78mm (.4"-3.07") 10mm-38mm (.4"-1.5") with Electrode Angle at 30° 10mm-78mm (.4"-3.07") with Electrode Parallel to Tube	10mm-140mm (.4"-5.52")	10mm-70mm (.4"-2.76") 10mm-26mm (.4"-1.02") with Electrode Angle at 30° 10mm-70mm (.4"-2.76") with Electrode Parallel to Tube	10mm - 26mm (.4"-1.02")
I.B.W. I.D. Size Range	9.5mm - 80mm (.375"-3.15")	N/A	9.5mm - 80mm (.375"-3.15")	N/A
Rotation Speed	0.33-6rpm	0.33-6rpm	0.33-6rpm	Max 5rpm
Filler Wire (Optional)	Rotates Coaxially with Torch	Rotates Coaxially with Torch		N/A
Wire Size	0.8/0.9/1.0/1.2mm (.030"/.035"/.040"/.045")	0.8/0.9/1.0/1.2mm (.030"/.035"/.040"/.045")	0.8/0.9/1.0mm (.030"/.035"/.040")	N/A
Speed Capablility	0-1500 cmpm (0-60ipm)	0-1500 cmpm (0-60ipm)	0-1500 cmpm (0-60ipm)	N/A
Spool Size	1kg (2lbs.)	1kg (2lbs.)	1kg (2lbs.)	N/A
Water-Cooled Torch
Amperage Capability	200 A Continuous	200 A Continuous	200 A Continuous	100 A Continuous
Cable Length	8m (25') Standard Extension Cables Available	8m (25') Standard Extension Cables Available	8m (25') Standard Extension Cables Available	8m (25') Standard Extension Cables Available
Head Weights
Weight	8kg (18lbs.)	9kg (20lbs.)	5kg (11lbs.)	1.2kg(2.7lbs.)
Weight with Filler Wire	10kg (22lbs.)	11kg (24lbs.)	6kg (13lbs.)	N/A
Dimensions	See Specification 424	See Specification 425	See Specification 426	See Specification 430
Torch/Wire Nozzle Adjustment	3 Axis Adjustment	3 Axis Adjustment	3 Axis Adjustment
Machine Body Cooling	Yes, Water	Yes, Water	No	No
Torch-Workpiece Adjustment
Manual	Threaded Ring ±5 mm (0.2")	Threaded Ring ±5 mm (0.2")	Threaded Ring ±5 mm (0.2")
Arc Voltage Control	No	Yes	No	No
AVC Stroke	N/A	16mm (0.625")	N/A	N/A
Weld Orientation	All (Vertical & Horizontal Gravity Positions)	All (Vertical & Horizontal Gravity Positions)	All (Vertical & Horizontal Gravity Positions)
Use With	Tubemaster	Pipemaster	Tubemaster	Tubemaster

Click on the link to view brochure in PDF format in COLOR or B&W or as a GIF.