DEMA "Snap-acting" Mixing Valves provide automatic mixing for solution supply tanks. Allows you to have a constant chemical mixture without hand mixing. All valves are magnetically operated except the Model 436-21 which is mechanically operated.

440 Series Valves have a 3/4" FGHT or 3/8" FPT inlet port and include mounting brackets. Models 436-21 and 437-21 have a 3/4" FPT inlet port and are designed for rigid pipe plumbing (no brackets included). Operating pressure is 20 to 150 PSI. Maximum temperature is 140° F. for most accurate performance. Now standard with plastic bodies for added corrosion resistance.

Standard Features: • Buna diaphragm and plunger for tight seating • Siphon breakers to prevent back-flow of chemicals into fresh water lines, (except 440-22T) • Heavy-duty polyethylene floats • Mounting brackets on all valves (except models 436-21 and 437-21) • 8' of Vinyl chemical tube with stainless steel foot valve.