Metal pall ring 1)special structure 2)Material:stainless steel, carbon steel, aluminum, bronze, 304L, 316L, and other alloy Welcome to our website:www.fxsino.comSteel pall ring introduction:Metal Pall Ring is one of the most common and well known packing,It was designed based on Raschig Ring by German BASR company in 1940s. The pall ring is made of a metal thin sheet and have a special structure, ...