ESBE Circulation Unit, Mixing Function GRA300 - 61045800 DN20 Pump - Wilo PARA 15/6 Note - without actuator and insulation shell Outstanding flow control thanks to the progressive characteristic of the valve Quick-Fit interface between actuator and valve - no tools needed 3 different high efficiency circulation pumps High class insulation shell Pretested and ready to use Compact design The ESBE series GRA200 and GRA300 are circulation units intended for heating circuits where an outstanding flow and temperature control are required. Equipped with two shut-off valves with thermometers, check valve, high class insulation shell and a high efficiency circulation pump. The units are delivered with a 3-way rotary progressive mixing valve which ensures best regulation performances independent from flow rate and low oversizing risk.