The welders on straight down column are built in the basic versions: Series SD points with power 30 ÷ 50 KVA at 50%, Series SDP projection with power 60 ÷ 180 KVA at 50%. Structure in carpentry of maximum strength and rigidity. Integral water cooling system of the transformer, electrode holder and electrodes. The basic versions are fitted with a single-stroke pneumatic cylinder, double safety push-button panel and pedal unit. Double stroke cylinder on request. Wide range of electrode holders and electrodes for various special applications.