The Brain® DRV40R
DRV40R Digital Recirculation Valve (DRV) designed specifically to be the primary water temperature controller in a continuously pumped circulating hot water system. DRV40R is supplied with a recirculation return manifold as shown.
Digital technology provides enhanced water temperature control accuracy which resists zero system demand “Temperature Creep” without the use of a manual throttling valve or a temperature activated pump shut-off device (aquastat).
+/-2°F water temperature control at points of use 25’ downstream during demand
+/- 2°F water temperature control at the DRV during zero system demand “idling” periods
2°F minimum valve inlet to outlet temperature requirement (system recirculation temperature loss)
Automatic shutoff of hot water flow upon cold water inlet supply failure
Automatic shutoff of hot water flow in the event of a power failure
Programmable set point range of 81-158°F (27-70°C)
Programmable thermal disinfection mode
Programmable 1st level hi/lo temp alarm display
Programmable temperature error level for safety shutdown