Requiring no external power or signal, Models AFX/AFR sense one fluid temperature while controlling another. Factory setpoints are available from 35 to 255°F (1.7 to 124°C) in either direct-acting (close on temperature rise) or reverse-acting (open on temperature rise) versions. Available in brass or stainless steel construction, in 0.75 to 1.25" NPT, the fluid temperature control valves carry an 18-month warranty.
Ogontz Corp., (800) 523-2478

Links