The control switch can be set in three states:REG,OFF and FULL.In a state of REG,the vacuum level of the wall source can be adjusted by the regulator;and high vacuum can be used in the state of FULL. Membrane suction regulator,the vacuum can be regulated from 0 to 20KPa(-150mmHg),and the regulated vacuum in the range can be kept steady. The overflow protection device can safely and efficiently prevent the liquid from entering into the regulator or the pipeline. Pressure relief valve can safely and efficiently prevent the device and the patient from damaging by the pressure.
