520419AC Caleffi 520 AngleMix DL 1/2" Sweat Union W Check Valves

520 AngleMix DL Dual listed; complies with ASSE 1017 and ASSE 1070. With checks. Body is DZR low lead brass with gauge. Adjustment temperature range: 95 – 150 ºF. Max. body pressure rating (static): 150 psi. Max. working pressure (dynamic): 75 psi. Max. inlet temperature: 195 °F. Gauge scale: 30 – 210 ºF. Gauge accuracy: +/- 1% FS. Min. flow for optimum performance: ½" and ¾" valves 0.5 GPM, 1" valves 1 GPM. (0 gpm with recirculation)