In high-end manufacturing sectors such as aerospace, pressure vessels, and new energy vehicles, the requirements for weld seam quality are exceptionally stringent. Japan’s OTC DAIHEN industrial-grade high-power TIG welding machines (such as the classic MR315T and the fully digital AEP/AVP series) have become standard equipment in many heavy industries due to their extremely stable arcs and deep penetration capabilities. Because these machines are constantly subjected to high-current continuous operations, the “water-cooling system” has become their standard factory configuration. This article provides a detailed breakdown of the water-cooled configuration lists and original torch matching specifications for these four main models.
1. Welding Expert Guide: Understanding Model Codes and Water-Cooled Torch Matching Logic
Buying the right machine and the right torch are equally important. Below are the technical hard indicators that equipment engineers must understand:
- Look for AC/DC Functionality (Essential for Aluminum): Models containing AEP or MR are AC/DC dual-purpose machines. They possess the capability to perform cathodic cleaning of the aluminum oxide film, making them mandatory for welding aluminum and aluminum alloys. In contrast, the AVP is a pure DC model, specializing in high-precision stainless steel and carbon steel root passes.
- 300A-Class Water-Cooled Torch (AW-18): Matches the MR315T and AEP300. When continuously arcing between 200A and 300A for long periods, an air-cooled torch would quickly melt. The AW-18 torch, with its built-in water circulation channels, is required.
- 500A Heavy-Duty Water-Cooled Torch (AW-12): Matches the AEP500 and AVP500. The high temperature of a 500A arc acts like a cutting machine. The AW-12 torch not only features thicker water-cooling channels, but its torch neck and cable assembly (BMRH-5001) are also heavily insulated for extreme thermal protection, ensuring absolute safety under massive currents.
2. 300A-Class AC/DC TIG Welder Water-Cooled Configuration Lists
Application Scenarios: Precision continuous welding of medium-thickness aluminum alloys and stainless steel, automotive aluminum component manufacturing.
2.1 MR315T (4m Water-Cooled) Standard Factory Configuration
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | AC/DC TIG Welding Power Source | MRHP-315 | 1 Unit |
| 2 | Heavy-Duty Water-Cooled TIG Torch (4m) | AW-18(4M) | 1 PC |
| 3 | Precision Argon Gas Flow Meter | W-25FL-Ar | 1 Set |
| 4 | Water-Cooled Torch Cable Assembly | BAB-3501 | 1 PC |
2.2 AEP300 (4m Water-Cooled) Standard Factory Configuration
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | Fully Digital AC/DC Welding Power Source | AEP-300 | 1 Unit |
| 2 | Heavy-Duty Water-Cooled TIG Torch (4m) | AW-18(4M) | 1 PC |
| 3 | Precision Argon Gas Flow Meter | W-25FL-Ar | 1 Set |
| 4 | Water-Cooled Torch Cable Assembly | BAB-3501 | 1 PC |
3. 500A Heavy-Duty High-Current Water-Cooled Configuration Lists (Extreme Mass Production Type)
Application Scenarios: 24/7 high-current continuous welding for thick-plate aluminum alloys in shipbuilding and heavy chemical industries, and ultra-thick stainless steel/carbon steel flanged pipelines.
3.1 AEP500 (4m Water-Cooled) Standard Factory Configuration (AC/DC / Aluminum Mainstay)
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | Fully Digital AC/DC Welding Power Source | AEP-500 | 1 Unit |
| 2 | 500A Extreme Duty Water-Cooled TIG Torch | AW-12(4M) | 1 PC |
| 3 | Precision Argon Gas Flow Meter | W-25FL-Ar | 1 Set |
| 4 | High-Current Heavy-Duty Cable Assembly | BMRH-5001 | 1 PC |
3.2 AVP500 (4m Water-Cooled) Standard Factory Configuration (Pure DC / Steel Structure Mainstay)
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | Fully Digital Pure DC Welding Power Source | AVP-500 | 1 Unit |
| 2 | 500A Extreme Duty Water-Cooled TIG Torch | AW-12(4M) | 1 PC |
| 3 | Precision Argon Gas Flow Meter | W-25FL-Ar | 1 Set |
| 4 | High-Current Heavy-Duty Cable Assembly | BMRH-5001 | 1 PC |
⚠️ Safety Procurement Warning: All configurations listed above are pure “water-cooled” setups. Once the equipment arrives at the workshop, you must provide or additionally purchase an independent “industrial circulating cooling water tank.” Striking an arc without cooling water circulation is strictly prohibited, as it will instantly burn out the torch head and internal hoses!