Firstly, depends on the model of Parweld. The 'Eco' range is the cheapo, & the 'Ergo' (which I sell) is the better quality one with a worldwide patent. The Parweld 'XP8' has the best duty cycle of any torch, anywhere, on the market.
Secondly, although the original Binzel design has been immitated by many, they are now made in China, not Germany, and no better than any other torch on the market.
weldequip