HomeWood boilers ORLANPellet boilersOrlan EVOWater heatersAccumulation tanksMixing valvesCirculation pumpsLaddomat 21Remaining offerThermostatic safety valvesExhaust chimney fansWood hygrometersEkoster ControlChimney draught regulatorsLog splittersFire-wood log saws Thermostatic safety valve STS 20 is a pressure self-dependent valve, put in motion by medium temperature from the heat source outlet. While temperature reach 97 st. C then STS 20 valve opens water from the water heater. After outlet opening, temperature cannot get higher that 110 st. C. Technical data Preservation

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