3-way check valve with low opening pressure and high fluid capacity. The valve is especially suitable for heating systems with storage tanks. The check valve prevents self-circulation from storage tank to boiler after the fire has gone out. DN25 (1"). We don't sell the LK Armatur products to outside of Estonia!
In case of power failure or pump breakdown LK 822 ThermoBac valve automatically opens for self-circulation. The valve should be mounted so that the flap in the check valve closes by its own weight.
Working temperature: Min. +5°C / Max. +110°C
Ambient temperature: Min. +5°C / Max. +60°C
Max. working pressure: 1.0 MPa (10 bar)
Max. pressure difference: 50 kPa
Media: Water - Glycol mixture max. 50%
Material, valve body/cover: Brass EN 12165 CW617N
Material, sealing: EPDM
Manufacturer: LK Armatur AB