The RAVI offers a simple non-electric alternative to the more traditional motorised valve and electric cylinder thermostat, and is available in 2-port versions for pumped and gravity systems, and in a 3-port version for pumped systems.
Simple, self acting control, requires no wiring
5.6m³/h coefficient of flow
External thread connection
25mm DN
For gravity primaries
Technical specification
TypeCylinder Valve & ThermostatSize28 mmNumber of Ports2Diameter28 mmManufacturer Model No013U808600Brand NameDanfoss