2-15 
Part  Description 
Negative pressure 
regulating knob 
The knob is used to adjust the pressure of the negative 
pressure suction device. 
The switch is used to change the working mode of the 
negative pressure suction device. It can be set to FULL, 
OFF, or REG. FULL indicates that the negative 
pressure suction device works continuously at 
maximum pressure, and the regulating knob does not 
work. OFF indicates that negative pressure is disabled 
and the negative pressure suction device does not work. 
REG indicates that you can rotate the negative pressure 
regulating knob to adjust the pressure of the negative 
pressure suction device. The negative pressure 
increases when you rotate the negative pressure 
regulating knob counterclockwise, and decreases when 
you rotate the negative pressure regulating knob 
The suction tube is used to deliver effusions, 
hematocele, pus, and other contaminants out of the 
patient. The inner diameter of the suction tube is Φ8 
(5/16"). The suction tube is directly inserted in the 
 
2.1.3 Labels 
 
 
 
 
 
 
Environment: temperature 
range
 
Environment: humidity 
range
 
 
Electricity: alternating 
current (AC) 
Electricity: internal 
battery 
Electricity: equipotential 
pillar
 
Electricity: protective 
ground
 
 
Electricity: fuse or circuit 
breaker 
 
 
 
icity: input/output 
Gas flow: flow control 
knob