BVTS aftercooling safety valve 1,3m
The BVTS thermostatic aftercooling valve is designed to protect solid fuel boilers from overheating. By opening the cooling water supply, it removes heat from the aftercooling exchanger of the boiler and thus protects the boiler from overheating in the event of an emergency condition of high water temperature in the boiler. Another use of the BVTS valve is to fill the fuel feeder to the boiler with water, before the fuel in the boiler tank ignites.
The BVTS valve is equipped with two temperature sensors. In the event of a failure of one, the other ensures the valve function.
The valve is approved according to Directive 97/23/EC (PED) and according to the STN EN 14597 standard. This is a STW type Th device according to STN EN 14597, it meets the requirements for a device for removing excess heat according to Article 4.3.8.4 of STN EN 303-5. Installation may only be carried out by a professionally qualified person.
The valve opening temperature depends on the valve type (the valve is factory-set, this setting cannot be changed by the user).
For proper function, the capillary sensor must be placed where the temperature is highest when the boiler overheats - usually directly at the top of the boiler or on the outlet pipe in close proximity to the boiler.
For manual opening, the valve is equipped with an activation button. The valve is also used in pellet boilers to protect against pellet burnout in the conveyor and subsequent fire in the pellet tank. In this case, the sensor is placed in the pellet feeder with a screw. After opening the valve, water floods the conveyor and extinguishes the burning pellets so that the fire cannot spread further into the tank.
Nominal diameter: DN 20
Connection to the boiler: external thread G 1/2"
Connection of the capillary to the nozzle: internal thread G 3/4"
Max. working pressure of heating liquid : 6 bar
Max. working pressure of cooling water : 6 bar
Valve opening temperature : 97 °C
Hysteresis : 6°C
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