Circulation unit, Mixing function GRA200 Outstanding flow control thanks to the progressive characteristic of the valve 2 different types of actuator: 3-point or proportional control signal (depending on version) Quick-Fit interface between actuator and valve - no tools needed 3 different high efficiency circulation pumps Available in 3 sizes: DN20, DN25, DN32 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. The Series GRA200 comes with actuator series ARA661 with 3-point control signal, 230V AC, or actuator series ARA639 proportional control signal,24V AC/DC. The circulation units are available in DN25 and DN32 and are equipped with either a Wilo or Grundfos pump.
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