ESBE Circulation Unit, Constant Temperature GFA300 - 61025100 The ESBE series GFA200 and GFA300 are circulation units equipped with thermostatic mixing valves. They are designed for heating circuits where a constant temperature control is required. Equipped with two shut-off valves with thermometers, check valve, high class insulation shell and high efficiency circulation pump. The GFAx00 is delivered with a 3-way thermostatic mixing valve for constant temperature control of the heating circuit. The thermostatic mixing valve has adjustable temperature setting in the range of 20°C – 55°C. DN20 Pump - Wilo PARA 15/6 Note - without insulation shell Thermostatic constant temperature control Desired mixing temperature set between 20°C and 55°C 3 different high efficiency circulation pumps High class insulation shell Pretested and ready to use Compact design