... smart 4,keep the temperature of outcome water constant thermostatic expansion valve Materialbrass bodyHydraulic pressure0.05Mpa--0.59MpaThreadG1/ ... NO.5 batteryPackingColor cartonThe features of the thermostatic expansion valve:1,The thermostatic mixer has three buttons: on-off key ... , temperature up key, temperature down key.2,The thermostatic mixer has a target temperature button and display actual ...