See all products of Motorised ball zone valves with insulation Two-way motorised ball zone valve for heating and cooling systems. Three-way motorised ball zone valve, for heating and cooling systems. By-pass tee. Spare two-point control actuator for motorised ball zone valves 6452 and 6453 series. Shell insulation for motorised ball zone valves 6453 series with by-pass tee 6459 and 6490 series.