Static Balancing Valves - Shells Polyethylene cross linked foam shellsAvailable for all main VIR valve seriesThickness 30mmThermal conductivity (lambda factor, kcal/mh°C)● 0,0298 at 0°C● 0,0303 at 10°C● 0,0326 at 40°CWorking condizions: -60°C to +90°C