The Model 77C is designed for high pressure applications including RO and desalination systems. The 77C is available in strong and anti-corrosive alloys of CF8 (304), CF8M (316), CF3M (316L), Duplex CD3MN (2205), Super Duplex CE8MN, CE3MN (2507). The 77C features 304 or 316 bolts and silicone bronze heavy nuts to help prevent galling during repetitive use.