HYDRAULIC CIRCUIT FOR Machinery for making instant drinks, PRESSURE AND SAFETY VALVES FOR SPECIFIED CIRCUIT AND METHOD FOR PREPARING instant drinks

摘要

1. Hydraulic circuit for instant beverage machines comprising a tank (10), an outlet tube (11) contained in said reservoir (10) of the water, the flowmeter (12) connected to said outlet tube (11), the pump (13), first quenching vibration valve (14), a boiler (15), the second relief and safety valve (16), the valve (17) for the water / steam, a third valve (18) of the beverage flow, the return tank (19), said bypass and a safety valve (16) comprises an inlet (20) for the water / steam, a first output (21) for the water / steam steered nny to said tap (17), a second output (22) for the pressurized water directed to said valve (18) dispensing a beverage, and a third output (23) for discharging water into the return tank (19), wherein said third output ( 23) is controlled by a solenoid valve equipped with a control coil (31), characterized in that said solenoid valve is provided with a first maximum pressure limiting device. ! 2. The hydraulic circuit of claim 1, wherein said first maximum pressure limiting device comprises a first calibrated spring (32). ! 3. The hydraulic circuit according to claim 1, wherein said second output (22) connected to a beverage dispensing unit, provided with a second maximum pressure limiting device. ! 4. The hydraulic circuit of claim 3, wherein said second maximum pressure limiting device comprises a second calibrated spring. ! 5. The hydraulic circuit according to claim 1, wherein said second output (22) connected to a beverage dispensing unit is also the input (30) which is provided with a valve equipped with a third maximum pressure limiting y