For overheating protection

Solid fuel boilers may get overheated during operation, most often due to electricity breakdown. The circulation pump stops, heat from burning fuel is no more removed continuously and the temperature inside the boiler grows rapidly.

In such a situation, a temperature-controlled valve that needs no power supply will ensure safe cooling the boiler down. As soon as 90-100 °C are reached, the valve opens and lets cold water from the mains in. The boiler will be cooled down either via a heat exchanger (JBV valve) or directly (DBV valve). The heated cooling water is then discharged into a sewer.

In order to work properly, the valve shall be installed to a place where the highest temperature is reached in case of overheating – usually directly in a top section of the boiler or on an outlet pipe close to the boiler.

The valves are fitted with a thermostatic element from a renowned French manufacturer. Since the thermostatic element is located directly in the valve body, its reaction to water temperature fluctuations is immediate. The valve has no capillary that could be damaged during installation. The valves are 100% tested in the production.

List of recooling valves:

  • DBV Thermostatic Recooling Two-way Valve
  • JBV Thermostatic Recooling One-way Valve

DBV Thermostatic Recooling Two-way Valve

Mostly used for cast-iron boilers and fireplace inserts that have no built-in recooling heat exchanger

  • a simple solution for boilers without a recooling heat exchanger
  • high cooling power due to direct cooling

G3/4″ threaded connection with a protective cover for the thermostatic element.

DBV Thermostatic Recooling Two-way Valve 8066

 


JBV Thermostatic Recooling One-way Valve

Mostly used for boilers with a built-in recooling heat exchanger, or with an external recooling heat exchanger.

  • can be installed on a boiler in production
  • can be installed into a recooling heat exchanger on a boiler outlet

G1/2″ threaded connection without a protective cover for the thermostatic element. A model with G3/4″ threaded connection and a protective cover for the thermostatic element is available upon special request.

 JBV Thermostatic Recooling One-way Valve

8877