double acting , you nudge with your elbom and it goes down and automaticily comes up , blowing air on both movements
I have two different blowers for my big forge a hand crank and a electric . I had to use the hand crank last month .dident take me long to decide to fix the electric
Mine was set up with both electric and hand crank using a "Y" and butterfly valves. I really like the handcrank blower for that last little bit when welding
Brian i prefer the hand crank when im puttering as i have more control over heet and waste less fule but when im blowing and going you cant beat electrc.
My brother in law took a bunch of my hand made shoes and old tongs to the flee market a wile back. He made quit a bit and said he had a hell of a time convincing people that thay were not anteques.