The Model 475 series diaphragm valves from Tridak, a Dymax Co. (Torrington, CT), are used with low- to medium-viscosity fluids. The internal design prevents fluid contact with the actuating components, making them suitable for use with reactive fluids such as cyanoacrylates and solvent-based adhesives and coatings. The standard Model 475 features an UHMW polyethylene diaphragm, acetyl copolymer fluid body, and hard-coated aluminum air cylinder body. The Model 475-T is similar to the standard model, but features a Teflon® diaphragm and fluid body with a hard-coated aluminum air cylinder body. The Model 475-SA incorporates an UHMW polyethylene diaphragm, passivated stainless steel fluid body, and hard-coated aluminum air cylinder body.