The Barco Series E-75 RS Rotary Union incorporates state-of-the-art sealing technology for use on water applications in the printing, paper, rubber, plastics and steel processing industries. Special Design Features : - Dry Run Capability - Silicon carbide to carbon graphite mechanical seals. - For abrasive applications silicon carbide to siliconized graphite mechanical seals. - Seals are user replaceable. - Sizes from 3/8" to 3" - Available in US or metric thread specifications.