Metal bellow seals are essentially balanced and are suitable for high temperature applications. The welded metal bellows do away with springs and therefore clogging or uneven face loadings are totally eliminated. The bellows are self-cleaning because the centrifugal forces prevent any build-ups of solid particles. This makes it ideal for slurry applications. Since Metal Bellows require no secondary sealing devices like 'O' rings, wedges or 'U' packs, shaft grooving or fretting is avoided. Material of construction includes special alloy steel with carbon or carbide faces.