Thermostatic valves for solid fuels boilers

Thermostatic valves for solid fuels boilers

 

For output control

 

Thermostatic draft regulators are used to control output of solid fuel boilers by controlling the combustion air damper. They are robust, resistant to both mechanical and thermal stress. Thanks to a double scale they can be installed either horizontally or vertically. The high-quality thermostatic element from a renowned French manufacturer guarantees precise operation and long service life of these regulators.

  • RT3 Thermostatic Draft Regulator

  • RT3E Electric Controlled Thermostatic Draft Regulator


RT3 Thermostatic Draft Regulator

The regulator needs no power supply. The desired temperature of heating water is set with a knob and kept by the regulator opening or closing the combustion air damper, which increases or decreases the output of the boiler.

G3/4" connection size, reducing coupler to G1" available as a special order.

Thermostatic mixing valve TSV1 Thermostatic mixing valve TSV1

 

 

 

RT3 Thermostatic Draft Regulator 8486

RT3E Electric Controlled Thermostatic Draft Regulator

The regulator works in the same manner as RT3, moreover it can reduce output of a boiler on electric signal, i.e. from a room thermostat. It is equipped with a 3m long silicone cable. If energized with 12V, the regulator will reduce the heating water temperature. When de-energized, the regulator maintains the temperature adjusted with the knob. The regulator can also be controlled continuously, with 0-12V tension.

Regulators are supplied either separately, or in a kit with a 12V source and a mechanical or electronic programmable room thermostat.

.G3/4" connection size, reducing coupler to G1" available as a special order.

 

Thermostatic mixing valve TSV1  

 

 

Thermostatic mixing valve TSV1

 

 

 

 

RT3E Electric Controlled Thermostatic Draft Regulator 7191
 

 

For preventing condensation

 

In the process of burning, among others also water releases from burning fuels in the form of steam. If the flue gas temperature is high enough, the steam exits through a chimney together with flue gas. However, if the flue gas cools down at a certain spot, condensation occurs. Condensate forms, containing further combustion products that can be very aggressive, esp. when burning wood or solid fuels, and can cause corrosion very quickly as well as clog heat transfer surfaces.

TSV1 and TSV2 thermostatic mixing valves mix cold return water with hot water from the boiler outlet. This way the whole heat exchanger (heat transfer surfaces) is kept warmer, at temperatures that will not allow condensation to occur and so clogging and quick corrosion will be prevented. Clogged heat transfer surfaces deteriorate boiler efficiency substantially and increase the risk of scale formation.

 TSV1

Quick corrosion and clogging will not occur if the heat transfer surfaces are warm enough as condensation will not occur above certain temperatures. The heat transfer surfaces will be warmer, making their service life longer and the boiler efficiency higher. These valves are fitted with thermostatic valves by a renowned French manufacturer.

List of Thermostatic valves:

  • Thermostatic Mixing Valve TSV3

  • Thermostatic Mixing Valve TSV2

 [ up ]

Thermostatic mixing valve TSV3

  • DN 25 with G1“ F thread
  • outlet temp. 65 °C (optionally 55, 77 °C)
  • for boilers of up to 25 kW output
Termostatic mixing valve TSV3 46°C 10741 
Termostatic mixing valve TSV3 55°C 10348 
Termostatic mixing valve TSV3 65°C 10347 
Termostatic mixing valve TSV3 77°C 10742 
Termostatic mixing valve TSV3B 65°C 10080

 

 TSV1

 

Thermostatic Mixing Valve TSV2

 
  • DN 50 with 2" male thread
  • outlet temp. 61 °C (optionally 85 °C)
  • choice of female G5/4", 6/4" and 2" threaded couplings
  • for boilers of 26 to 100 kW output
TSV2 5/4  - thermostatic valve incl. screw joints 5/4" 6544
TSV2 6/4  - thermostatic valve incl. screw joints 6/4" 6563
TSV2 2  - thermostatic valve incl. screw joints 2" 6564
TSV1

TSV1

 

 

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
 

 

Thermostatic pump group Regulus Thermovar LK 810

 

Burning causes releasing of water, among others, from the fuel in the form of steam. If the flue gas is hot enough, the steam leaves through the chimney together with flue gas. However, if the flue gas gets cooler at some spot, condensation of water vapor occurs there. The condensate contains products of burning that can be very aggressive esp. when burning wood or solid fuel and thus cause deposit formation on heat transfer surfaces and in steel boilers also fast corrosion. Blocked heat transfer surfaces increase the risk of lime formation and cause the efficiency of combustion getting worse.

Termovar LK 810 thermostatic group mixes cold water returning from a heating system (or from an accumulation tank) with hot water from a boiler. This keeps return water at the given minimum temperature (55 °C, 65 °C, 70 °C according to model) and the boiler works with better efficiency. This process also limits clogging of heat transfer surfaces and formation of aggressive condensate. The lifetime of the boiler is then substantially longer. The higher the return line temperature, the lower the risk of condensate formation. The pump group also involves a floating check valve enabling boiler cooling by gravity circulation in the event of power supply failure, and at the same time recooling of the accumulation tank via an extinguished boiler is prevented.

The pump group contains:

  • Circulation pump Grundfos UPSO 65 Low Energy
  • Thermostatic mixing valve
  • Automatic balancing valve for bypass
  • Floating check valve
  • 3 thermometers
  • 3 5/4“ ball valves with cap nuts
  • Neat insulation to minimize heat loss 

thermovar

Technical Data
Voltage 230[V] 50 [Hz]
Max. working temperature 110° [C]
Min. working pressure 10 [bar]
Circulation pump Grundfos UPSO 65
Low Energy
Max. flow rate at a diff. pump
speed		 3……2800 [l/h]
2……2200 [l/h]
1……1400 [l/h]
Connection dimensions 5/4“ [F]
Body material brass
Dimensions 210 × 210 × 110 [mm]
Weight 4,8 [kg]

Model Min. water temperature
into boiler		 Max. boiler
output		 Description Code
LK810 - 55 55 °[C] 90 [kW] Pump group with a thermostatic
controlled minimum return water
temperature into a solid fuel boiler,
with an exchangeable thermostatic
element.		 10550
LK810 - 65 65 °[C] 60 [kW] 10302
LK810 - 70 70 °[C] 45 [kW] 10551
 

 

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