MW closed orbital welding heads for intensive duty, tubes Ø6–170 mm
Country: · Model: MW 34, MW 65-3, MW 115-3, MW 170
The closed orbital heads of the MW series weld tube-to-tube butt joints without filler wire on tubes of Ø6–170 mm, in four sizes. They are designed for intensive series work with austenitic stainless steels. They are used in the food, pharmaceutical and chemical industries, in shipbuilding and in the installation of process piping.
- Models
- MW 34, MW 65-3, MW 115-3, MW 170
- Tube outside diameter
- 6–33.7 / 6–65 / 10–115 / 80–170 mm
- Process
- TIG without filler, closed chamber
- Cooling
- liquid, for high duty cycle
Technical specifications
| Models | MW 34, MW 65-3, MW 115-3, MW 170 |
|---|---|
| Tube outside diameter | 6–33.7 / 6–65 / 10–115 / 80–170 mm |
| Process | TIG without filler, closed chamber |
| Cooling | liquid, for high duty cycle |
| Clamping | titanium TCI inserts (lifetime warranty) |
| Weight | 6–18 kg |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The joint is welded inside a closed chamber with a gas seal, so the welds are free of oxidation. The tubes are clamped by flexible titanium TCI inserts for standard outside diameters and tube tolerances for hygienic piping and high-purity systems. The inserts carry a lifetime warranty, and since 2022 all MW heads have tool-free quick clamping. A high duty cycle is achieved with heat-resistant materials and closed water cooling. Welding speed, constant or pulsed, is held by a closed loop, and an encoder runs the program by position. Helpful features are an offset electrode holder, a reversible hook for wider clamping tolerances, return of the electrode gear to the loading position, a kit for elbows, reinforcing rods and a pendant in the handle. The narrow profile makes it possible to weld in places with limited radial and axial clearance. The design takes into account the requirements of EHEDG, ASME and FDA.
How to choose
The model is selected by the tube outside diameter. MW 34 covers 6–33.7 mm and weighs 6 kg, MW 65-3 6–65 mm and 7 kg, MW 115-3 10–115 mm and 9 kg, and MW 170 80–170 mm and 18 kg. For fittings the maximum diameter is 25.4 mm (MW 34), 60.3 mm (MW 65-3), 114.3 mm (MW 115-3) and 168.3 mm (MW 170). The heads are powered by the sources P3, P4, P6 and the earlier PS 164-2. If filler or tubes up to 195 mm are needed, look at the open head MU IV.
Request a price and lead time
MW closed orbital welding heads for intensive duty, tubes Ø6–170 mm. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What tubes can be welded with MW heads?
With an outside diameter from 6 to 170 mm, depending on the model. MW 34 takes 6–33.7 mm, and MW 170 takes 80–170 mm.
Is filler wire needed for MW?
No, the heads weld tube-to-tube joints without filler in a closed chamber.
How much do the MW heads weigh?
From 6 kg for MW 34 to 18 kg for MW 170. MW 65-3 weighs 7 kg, and MW 115-3 9 kg.
Which sources are compatible with MW?
P3, P4, P6 and the earlier PS 164-2. On ships the P4 and MW 65 pair is used for stainless steel and Inconel.
What are TCI inserts?
Flexible titanium inserts that clamp the tube to a standard diameter and tolerance. Since 2022 all MW heads have tool-free quick clamping.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.