MTW / MHP W — water-cooled MIG/MAG torches for manual welding, 250–700 A

Technical specifications

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026. Customs codes are for reference only; the final code is determined at customs declaration for the specific model.

Description

The cooling circuit is moved as far forward and outward in the body as possible, and the shape of the contact tip absorbs less radiant heat; by the manufacturer's data this alone lowers the temperature of the consumable parts by up to 70 °C. The “s” series, designed for steel in small and medium workshops, has the MTW 320s, 400s and 500s rated 320, 400 and 500 A with 0.8–1.6 mm wire and hose packages of 3.5, 4.5 or 6 m. The industrial “i” series covers the MTW 250i and 250i TT SH at 250 A, the 400i and 400i TT SH at 400 A, and the 500i and 700i, the last two working with 1.0–1.6 mm wire. The Multilock hose packages MHP 400i W ML TT, 500i W ML and 700i W ML, 3.35, 4.35 or 5.85 m long, accept interchangeable MTB W bodies from the 250i W to the 700i W, including the 330i W and flexible Flex versions. A built-in water stop keeps liquid out of the gas channel when the body is removed. Control is Standard, Up/Down or JobMaster, connection is through the FSC connector, and versions for machines from other manufacturers are available.

How to choose

First calculate the current at 100 % duty cycle, because water cooling makes sense precisely under long-term load. Up to 500 A on steel the “s” series is enough; for 700 A and industrial shifts you need the MTW 700i or MHP 700i W ML. For aluminium or thin wire at a long distance from the wire feeder, take the PullMig W with a drive on the torch. If different assemblies are welded at one station, Multilock allows the body to be changed to suit the weld without removing the hose package.