Otto Arc Systems, Inc. Weld Heads

TPWH-O Series, Open Weld Head (1", 3", and 5")

TPWH-O Series, Open Weld Head (1", 3", and 5")

Technical Specs (pdf)

TPWH-O-3 Operating Manual (pdf)

The TPWH-O Series is designed for TIG welding on tube to tube, pipe to pipe and pipe fittings and is suitable for carbon and stainless steel. The TPWH-O Series is used for applications that do not require AVC/OSC. Welds tubing and pipe for industries such as chemical, food, medicine, boilers, military, and nuclear industries.

  • Suitable for thin wall stainless steel, carbon steel and other common alloys
  • Capable of welding 4mm (.158") wall thickness
  • Used for tube to tube, tube to flange, tube to elbow and tube to valve etc.
  • Automatic all position TIG welding for tube to tube welding with or without wire feed
  • Water cooled and highly durable torch design
  • Mechanical tracking ensures consistent torch height control
  • Recommended Power Unit = OW-ARC 180
  TPWH-O-1 TPWH-O-3 TPWH-O-5
Tube OD Inner Clamp:
15 - 25mm
(.625" - 1")
Inner Clamp:
19.05 - 45mm
(.75" - 1.75")
Inner Clamp:
38.1 - 76mm
(1.5" - 3")
Outer Clamp:
25 - 43mm
(1" - 1.625")
Outer Clamp:
45 - 77mm
(1.75" - 3")
Outer Clamp:
76 - 130mm
(3" - 5")
Tungsten Diameter 2.4mm (3/32") 2.4mm (3/32") 2.4, 3.2mm (3/32", 1/8")
Rotation Speed 0.37 - 7.45 rpm 0.19 - 3.8 rpm 0.11 - 2.2 rpm
Protective Gas Ar / Mixed Gases Ar / Mixed Gases Ar / Mixed Gases
Cooling Water Water Water
Cooling Flow (mL/min) ≥600 ≥600 ≥600
Weight kg (lbs) 2.5 kg (5.5 lbs)
excludes cable
4 kg (9 lbs)
excludes cable
10.8 kg (23 lbs)
excludes cable
Dimensions (mm) 305 x 128 x 230 mm 310 x 180 x 290 mm 435 x 300 x 400 mm
Dimensions (inches) 12" x 5" x 9" 12" x 7" x 11" 17" x 12" x 15.5"