TECNA TE7902 HVAC & Sheet Metal Spot Weld Gun – 2.5 kVA
HVAC / sheet-metal application?
We’ll help match power, reach, cooling and production rate to the right TECNA model.
TECNA TE7902 HVAC & Sheet Metal Spot Weld Gun – 2.5 kVA
Description
Description
HVAC Quick Fit — TECNA TE7902
The TE7902 is the entry point in the Crossfire HVAC spot-welding lineup. It is best suited to smaller HVAC and sheet-metal shops that need a simple portable resistance spot welder for intermittent production without adding compressed air or a water-cooling circuit.
Good fit for
Spin-in collars, small duct fittings, brackets, plenums, sheet-metal housings and light overlapping assemblies.
Why choose it
Compact manual operation, 2.5 kVA output, broad arm selection and no air or water requirement.
Move up when
You need a higher operating rate, water cooling, pneumatic clamping or a fixed production station.
HVAC application note
Resistance spot welding is useful where two overlapping sheets can be clamped between electrodes. It is not a replacement for a continuous airtight seam. For galvanized duct material, confirm weld settings and electrode maintenance on the actual coating and gauge before production.
TECNA manufacturer technical reference ↗
| TECNA TE7902 Portable Spot Weld Gun Specifications | |
|---|---|
| Model | TECNA TE7902 |
| Gun Type | Scissor |
| Operation | Manual |
| Nominal Power (50% Duty Cycle) | 2.5 kVA |
| Continuous Power | 1.77 kVA |
| Maximum Short Circuit Power | 20.5 kVA |
| Maximum Welding Power | 16 kVA |
| Secondary No-Load Voltage | 2.5 V |
| Supply Voltage | 220V / 60 Hz (In Stock) 440V / 60 Hz (Available Upon Request) |
| Connection Power | 13.5 kVA |
| Delayed Fuse | 20 A @ 220V / 12 A @ 440V |
| Primary Cable (up to 15 m) | 0.004 in² (2.5 mm²) |
| Nominal Current | 1.0 kA |
| Continuous Current | 0.7 kA |
| Short Circuit Current | 8.2 kA |
| Maximum Welding Current | 5.75 kA |
| Duty Cycle @ Maximum Welding Current | 1.1% |
| Arm Length Range | 4.92 - 19.69 in. (125 - 500 mm) |
| Arm Gap | 3.70 in. (94 mm) |
| Arm Diameter | 0.87 in. (22 mm) |
| Arm Holder Diameter | 0.71 in. (18 mm) |
| Electrode Diameter | 0.47 in. (12 mm) |
| Electrode Stroke | 2.17 - 7.28 in. (55 - 185 mm) |
| Electrode Force (125 mm Arms) | 264 lb (120 daN) |
| Electrode Force (500 mm Arms) | 84 lb (38 daN) |
| Compressed Air Required | Not Required |
| Water Cooling Required | Not Required |
| Mild Steel Capacity | 2 + 2 mm (0.08 + 0.08 in.) |
| Recommended Accessories | |
| Recommended Tool Balancers | TECNA 9356 and TECNA 9357 |
HVAC / duct fabrication focus
Where this TECNA model fits in an HVAC shop
Portable / intermittent HVAC work
Small shops, custom fittings, collars and light sheet-metal assemblies. Resistance spot welding is strongest where overlapping sheet can be clamped from both sides and the joint only needs discrete welds rather than a continuous airtight seam.
TECNA HVAC model ladder
Choose by shop size and production style
TE7902
Small shops, intermittent fittings and simple portable use. No air or water required.
View model → Portable • 6 kVATE7903
Higher-rate hand welding with water cooling; no compressed air required.
View model → Suspended • 6 kVATE7913
Pneumatic, water-cooled and balanced for repetitive multi-angle production.
View model → Pedestal • 6 kVATE7915
Dedicated fixed station for recurring fittings and light production work.
View model → Stationary • 25 kVATE4649N
Established duct shops needing deeper reach, more force and production duty.
View model → Production • 50 kVATE4663NX
Highest-capacity option here for large parts, deep access and demanding output.
View model →HVAC Spot Welder Fit Check
Send the duct-shop application. We’ll narrow the machine.
You do not need to know the TECNA model. Gauge, material, part type, access, weld rate and available shop services are more useful than guessing at kVA.
24–26 ga galvanized • spin-in collars + square-to-round fittings • 50–100 welds/day • portable preferred • 230 V available • no water loop.
