GTAW and PAW Gas Shielding Devices

Improve your Shielding Protection on All Alloys for Better Quality Welds

  High precision gas auxiliary and trailing shields for the most demanding applications

(select to see larger image)

PWT offers a product line of sophisticated gas auxiliary and trailing shields, or trail cups, that dramatically improve the performance of a standard GTAW/PAW torch. The devices incorporate PWT's patented technology for modifying the inert gas pressure and flow from a single source (entering the standard torch) into efficient multiple shielding paths.

(select to see larger image)

Our gas shields can be used in aerospace, semiconductor, vacuum, medical, nuclear, food/beverage processing, oil exploration, and other industries where absolute inert gas coverage is required. Our gas auxiliary and trailing shields are an excellent choice for welding all alloys such as iron, nickel, cobalt, and titanium base alloys.

  The Ultimate Shield® gas auxiliary/trailing shields are state-of-the-art gas shielding systems designed to interface with industry common machine or manual gas tungsten arc welding torches. The auxiliary shields and trail shields are supplied with only one source of argon, that coming into the welding torch. No secondary tube is utilized to supply inert gas to the shields. The success of the devices is attributed to the optimum distribution of gas and the correct gas velocity ratios between the multiple gas paths due to PWT's unique gas metering technology.

• Benefits  (opens in new window)
• Features (opens in new window)

• (select to see larger image)

  Ultimate Shield® Gas Trailing Shield (P/N 430301)
  The Ultimate Shield® gas trailer provides an effective secondary gas curtain around the primary gas, which is directly over the molten pool. This secondary system prevents air from disturbing the primary gas. The trailing system supplies inert gas over the heat affected area as the hot metal traverses out of the primary and secondary systems without any interruption of gas coverage between the systems. The total length from the front portion of the shield to the back end is 3.3".
   
   

• (select to see larger image)

  Ultimate Shield® Plus "2" Gas Trailing Shield (P/N 430302)
  The Ultimate Shield® Plus "2" gas trailer is like its sister, P/N 430301, except it is 2" longer. This shield was designed to enhance the welding gas shielding protection on parts that require a longer gas coverage area than our standard Ultimate Shield® trailing shield (P/N 430301) provides. The total length from the front portion of the shield to the back end is 5.3".
   
   
• Ultimate Shield® Narrow Groove Trailing Shield (P/N 430303)

  (select to see larger image)

  The Ultimate Shield® narrow groove trailing shield is now available to access weld joints at the bottom of deep, narrow openings. The trail shield extends into a 1.2" (30mm) deep groove as narrow as 0.8" (20mm) wide, resulting in superior shielding protection in narrow grooves like never before.

  (select to see larger image)

  
   
   
• Ultimate Shield® Curved Trailing Shield (P/N 430307)   NEW for 2016
  

  (select to see larger image)	PWT's latest family of trailing shields is the small, curved shield. The Ultimate Shield® curved trailing shield is ideal for enhancing the welding gas shielding protection on your circumferential parts such as pipe and tube. Our shields are designed for circumferential parts from 1/2 inch to 8 inches in diameter. We supply our patented shroud/body that fits over the welding torch ceramic cup, as our straight Ultimate Shield® does, and a removable skirt that attaches to the shroud body.	6 skirt sizes  (select to see larger image)
  Our skirts are designed for your circumferential hardware in increments of 1/2" - 1 1/2", 1 1/2" - 2 1/2", 2 1/2" - 3 1/2", 3 1/2" - 4 1/2", 4 1/2" - 6", and 6" - 8". Therefore, you may purchase a shield for any one of these size ranges, or if your requirements are to weld several of these size ranges, you may buy one “full” shield assembly and additional individual skirts of different sizes. We also supply kits which have the smaller four skirt sizes in them or larger kits with all six skirt sizes in them.

  
   
   
• Ultimate Shield® Gas Auxiliary Shields (P/N's 430311 & 430312)
   
  The auxiliary shields provide several effective secondary gas curtains around the primary gas, which is directly over the molten pool.
   

  (select to see larger image)	P/N 430311 Our larger auxiliary shield, 2.0" in diameter, has three secondary systems (inner, central, & outer) providing maximum shielding protection to the weld and a large effective coverage area.		(select to see larger image   of 430311 cross-section)
  (select to see larger image)	P/N 430312 This unit, with two secondary systems (inner & outer), is smaller, 1.5" in diameter, and lighter in weight than P/N 430311.

  
   
• Ultimate Shield® High Heat Trailing Shield (Body P/N's 430301HH-1 and 430302HH-1)   NEW for 2016
  

  PWT has adapted its technology to high current, aka, "high-heat" applications. We use a copper perforated screen (shown at right) as the bottom screen allowing the standard Ultimate Shield® or Ultimate Shield® Plus "2" assemblies to withstand high welding currents and "high heat" transfer to the bottom screen.

  screen (select to see larger image)

  
   
   
• “Special” Small Torch Extension/Trailing Shield Assembly (also called Curved Torch)   NEW for 2016
  

  The “Special” Weld Torch extension, or “Curved Torch”, would be able to access the inside seal teeth on turbine engine knife edge seals with multiple sets of seal teeth or similar applications. The torch will be made to curve around an upper overhang, so that proper weld buildup, including gas shielding protection, can be afforded to the inner seal teeth. The specially designed “U” shaped tubing assembly will have the capability to conduct electricity and gas.

  The torch/trailing shield head, which is “racetrack” shaped, is about 1/4" (6.4mm) thick in order to fit into a small opening.   The bottom screen will be a specially made “fine mesh” stainless steel screen material that we utilize in our standard trailing shields.   The trailer compartment is designed to supply an even, laminar gas flow coming out of the head, for absolute gas protection of the part's critical seal teeth.   Examples of Different Designs of Our Curved Torch (select any photo to see larger image)

  Note:This torch/trailing shield assembly can be interfaced with standard weld torches.

  
   
   
• Micro-Plasma Gas Auxiliary Shields
  

  (select to see larger image)

  PWT's micro-plasma welding torch gas auxiliary shields are designed to interface with industry common manual or machine M-PAW torches. The design is similar to their GTAW cousins. Precise machining allows them to fit over and seal to the M-PAW torch copper nozzle.

  
   
   
• Plasma Gas Trailing Shields
  

  PWT also produces a family of gas trailing shields to interface with the Thermal Arc PAW torches.

  (select to see larger image)

   
   
• Special/Custom Shields

  PWT also offers special or custom gas trail cups to meet your unique needs.       Please request a quotation for your specific application.
  	(select any picture for a larger view)

[ Up ] [ GTAW/PAW Systems ] [ Gas Shielding Devices ] [ Power Supplies ] [ EBW Systems ] [ EBW Components ] [ Wirefeed/Torch Extensions/Tooling ]