ITG regulating-protecting system

which we present you is correct and the only good quality solution because it protects boiler from low return water temperature, which is controlled by protecting sensor fixed at 70^oC. Starting water temperature from boiler to installation can be regulated through regulating amplifier and sensor placed at flow start.

Three-way regulating valve is installed as it is shown in schema and it mixes starting and returns water in boiler, as well as starting and return water in installation.

When boiler starts from cold state, three-way valve is closed between boiler and installation and at the same time it is open between starting and return of boiler flow. In that way circulation, provided by boiler circulating pump, is possible only in boiler and is lasting until return water temperature reaches the requested level. After that, regulating amplifier is activated and it controls water temperature to installation.

With correct selection of regulating circuit in accordance with boiler capacity and regulated temperature in regulating-protecting circuit, boiler protection and energy saving reach optimum.

Regulating-protecting systems have already found long-lasting applications in ITG boilers and have justified our high demands in exploitation. Realized effect in protection of boiler from low-temperature corrosion is immeasurable but justify its technical solution, as well as protection of boiler from high temperature differences of starting and return flows.

When boiler, equipped with regulating-protecting circuit, is not in function of energy production, automatic device closes three-way valve to installation and protect boiler from under-cooling. That way, additional effect of energy saving can be managed, which is necessary for repeated start of boiler.