Miniature Temperature Valve. Set Point, +80°F to +550°F. Calibration Tolerance, whichever greater, ± 10°F or ±2% of the set point. Deadband, freon 15°F to 75°F maximum. Proof pressure, up to 1500 psig. - This normally closed air valve with welded stainless steel construction features a saturated vapor thermal system.