Lorch V24 DC is an inverter TIG power source for direct current, liquid cooled. You set the current steplessly from 3 A to 240 A, the duty cycle is 240 A at 60% and 220 A at 100%, the supply is 3 x 400 V with a 16 A fuse. The pulse reaches 20 kHz, and the torch in the set has current control in the handle.
What this machine is for
The DC version works on mild steel and on stainless steel. You will not weld aluminium with this machine, because breaking the oxide layer needs alternating current and this source gives direct current only. The maker aimed the model at pipeline prefabrication, the food industry and precision engineering workshops, that is where the weld has to be tight, smooth and resistant to corrosion.
The lower limit of 3 A gives you control over very thin sheet and over the repair of injection moulds, where every tenth of a millimetre of added material and the amount of heat put in counts. The upper 240 A pulls welds on thicker walls, and under continuous load the machine holds 220 A, so you make long circumferential joints on pipes without pauses for the source to cool.
The fast pulse at a frequency of 20 kHz gathers the arc into a narrow, stiff column. Such an arc bends less in a magnetic field, hits the root of the joint even with tightly set parts and raises the pressure in the pool, so penetration is deeper at lower heat input. On acid resistant steels a smaller dose of heat means a smaller heat affected zone and better kept corrosion resistance of the joint.
Features and equipment
- Pulse up to 20 kHz: a very high frequency narrows the arc and stiffens it, so you guide it more precisely and put less heat into the material.
- Stepless current adjustment from 3 A to 240 A: you go down to a very thin part and come back to full current without changing equipment.
- Continuous work at 220 A with a 100% duty cycle: the source pulls long beads without pauses for cooling.
- Built in liquid cooler: the fluid runs in a closed circuit and takes heat from the torch, so the wear parts of the torch and the current path hold a steady temperature.
- Lorch torch controlled from the handle: you correct the current with your thumb while welding, without putting out the arc and without walking to the panel.
- Housing that carries heat away: the cooling of the electronics shields it from grinding dust in the hall.
Technical data
| Brand | Lorch |
|---|---|
| Type | inverter TIG DC power source |
| Welding current range | from 3 A to 240 A, stepless |
| Current at 60% duty cycle | 240 A |
| Current at 100% continuous load | 220 A |
| Supply | 3 x 400 V |
| Fuse | 16 A |
| Pulse | up to 20 kHz |
| Current type | DC |
| Cooling | liquid |
| TIG torch | Lorch 4 m, controlled, liquid cooled |
| Earth cable | 3 m |
What you get
- Lorch V24 DC inverter power source
- Lorch TIG torch 4 m, controlled, liquid cooled
- earth cable 3 m
- gas hose
- cylinder regulator
What to watch out for
For work you need a 3 x 400 V power socket and a circuit with a 16 A fuse. The cooler is built into the source, so after delivery check the fluid level, the tightness of the couplings and the flow in the circuit before you strike the first arc. The torch has control in the handle, so confirm that the adjustment works and check the state of the control cable before you buy, because that part takes the most during work.
A 60% duty cycle at 240 A means six minutes of welding in a ten minute window, work without a limit starts at 220 A. The torch is 4 m and the earth cable 3 m, so with larger parts you move the source together with the workpiece. The card gives neither weight nor dimensions, ask before transport.
How we sell used machines
This unit was checked in our service workshop in Krotoszyn with measurements to PN-EN 60974-4 and a load test. The price includes the first year of the basic service package: an inspection with cleaning of the machine and a validation measurement. Further years can be added. We ship across the European Union, collection in person by appointment.
