Return temperature limiter - RTB balancing set:
The RTB valve is a thermostatic return temperature limiter with adjustable maximum temperature and fixed minimum flow in the order of 0.5% of the nominal flow.
The RTB eliminates the need for manual regulation, as the flow rate is adapted to the actual output and thus the heating circuit is automatically hydraulically balanced. The setpoint of the maximum return temperature is adjusted at the thermostatic head. If the return temperature exceeds this setpoint, the valve reduces the flow by closing without auxiliary energy. The heated heating water remains longer in the heat exchanger and can thus give off heat more effectively. Due to the fixed minimum flow rate, the valve reacts as quickly as possible to load changes.
...for underfloor heating circuits
In addition, the heating-up time after the night setback is shortened. Furthermore, with an adjusted heating curve, the RTB valve can be used as an individual room control by regulating the return temperature close to the room temperature. Furthermore, significantly less pump energy is consumed due to lower volume flows. As a practical application of such valves, we recommend mounting them directly on the return collector of commercially available underfloor heating circuit manifolds.
...for heat exchangers of drinking water storage tanks, air heaters, swimming pool heat exchangers and air-conditioning systems.
The RTB balancing set consists of a thermostatic return temperature limiter with adjustable maximum temperature and fixed minimum flow in the order of 1% of the nominal flow. Double nipple and angled T-piece complete this valve to an easy-to-install balancing set.
- No detailed knowledge of the space heating load or installation distances necessary with a professional initial position
- No electronic waste
- High system efficiency due to constantly low return temperature
- Less pump capacity due to smaller volume flows
- With adjusted heating curve Room temperature control according to ENEV §14 (2), but without switch-off function
Return temperature manifold (RTM)...
The installation of a return temperature distributor feed-in set is generally recommended for fresh water or solar modules. Furthermore, other areas of application in which temperature fluctuations are to be expected. By using it, the feed can be carried out at the buffer at the correct temperature. This supports clean stratification and a high degree of utilisation of the heat bound in the buffer.
...Fresh water stations and solar systems (feed-in set)
The distribution temperature setpoint is adjusted at the thermostat head: Water above the setpoint flows through output red (hot), below the setpoint through output blue (cold). The valve can react quickly to temperature fluctuations thanks to the reaction time of the thermostatic head (5 seconds). We generally recommend the installation of such RTV feed-in sets for fresh water or solar modules and other applications where fluctuating feed-in temperatures are to be expected. The spiral immersion sensor and angled T-piece for optimum sensor mounting as well as matching screw fitting inserts complete this valve to make an easy-to-install feed-in set.
Flow temperature controller (FTC)...
The FTC products consist of a thermostatic flow-temperature controller in the form of a three-way mixing valve and a thermostatic head with sensing element. We have two different sets to choose from for different applications:
...Fresh water stations and solid fuel boilers and CHP (extraction set)
If heat is withdrawn from the buffer, e.g. by a fresh water station, the risk of calcification is reduced by limiting the temperature and at the same time the supply of hot water in the top zone of the buffer is extended - more drinking water can therefore be heated with the same heat content in the buffer because the buffer remains hot longer at the top but becomes cold more quickly at the bottom. If, on the other hand, heat is supplied to the buffer, it is initially only concentrated in the upper zone of the buffer until its temperature has reached the setpoint value and only then is it also conducted to the lower zone. The buffer therefore gets hotter faster at the top and stays cold longer at the bottom! An angled T-piece for optimal sensor mounting and matching screwed inserts complete this valve to an easy-to-install extraction set.
...Heating value peak load boiler at the buffer tank (heating value set)
By mixing boiler flow into the boiler return, the boiler flow temperature is constantly controlled to the set target value. For this purpose, the boiler circuit pump should be set to the highest possible output (stage III). In this way, the volume flow is adapted to the boiler output during buffer loading (stove!) and the flow temperature is kept constant even with variable boiler output. The buffer is always filled with equally hot water at the top, which is what makes precise top loading possible in the first place. In addition, the boiler is protected against condensation and subsequent cooling down of the hot zone during pump run-down (residual heat utilisation) is effectively prevented. Immersion sleeve and angled T-piece for optimum sensor installation as well as matching screwed inserts complete this valve to an installation-friendly heating value set.
Flow temperature limiter (FTL)...
The purpose of the FTL valve is to prevent a defined temperature from being exceeded. If there is a defect in the heater or mixer that causes the flow temperature to rise above the set value, then the pump is de-energised. This automatically regulates the heating process. This ensures special protection for the screed, the pump and above all the heat generator.
...for downstream flue gas heat exchangers of boilers and CHP units (Condenser Set)
If the flow temperature falls below the adjusted setpoint, the valve reduces the flow by closing without auxiliary energy. The heating water to be heated remains longer in the heat exchanger and can thus absorb more heat. Due to the fixed minimum flow rate, the valve always reacts as quickly as possible to load changes. The flow rate is adapted to the actual power absorbed and the heating circuit is automatically hydraulically balanced. Double nipples and an angled T-piece for optimum sensor installation make it a practical installation set.
...for condensing boilers without minimum flow and ∆T-limitation (condensing set)
The sensor monitors the flow temperature and throttles the water quantity if the temperature is below the setpoint. This enables a constant flow temperature with variable boiler output or fluctuating return temperature through variable water quantity with full condensing value utilisation. In buffer cylinders, the use of the VTB condensing set is manifested by the rapid build-up of a stable hot water zone in the uppermost buffer zone (stable top charge), a high level of hot water comfort, high regenerative utilisation rates and long boiler running times. Immersion sleeve and angled T-piece for optimum sensor installation as well as matching double nipples and heat-conducting paste complete this valve to an installation-friendly condensing set.