8
The rotation of the Motor is reduced by the Worm Gear and the rotational motion is converted to
reciprocating motion by Eccentric Device(Eccentric Cam, Slider, Rod & etc.). This reciprocating movement
changes the volume inside the pump through the diaphragm connected to its Rod, causing the pump to do
its pumping action as results of the change of the volume inside the pump and the check ball installed at
the head of the pump. The Smoothy metering pump removes pulsation through the flow of fluid having a
trapezoid discharge waveform produced by a high-precision constant-velocity cam which is continuously
discharged through the two liquid ends having a 180o phase difference.
8
Operation Principle and Structure
Gearbox
flange
Motor
Joint
Cover
Attachment
Gearbox
Bed
Head
A
B
Cam Guide shaft
Diaphragm(rear)
Discharge
Suction
Head
Check ball
Diaphragm(front)
Slider Diaphragm
rod
40
1800
600
1200
0
20
2400
3000
3600
4200
4800
5400
6000
100
60
80
1 bar
5 bar
40
3600
1200
2400
0
20
4800
6000
7200
8400
9600
12000
10800
100
60
80
1 bar
5 bar
7
Performance Curves
•
Condition: Clean Water, Room Temperature, Suction Head - (1M) BLDC TYPE
●PDS-5 ●PDS-10
Notes) 1. Above performance curves were tested at our testing equipment under the fixed condition(Clean Water,
Room Temperature, & 1m of Suction Head). Therefore, performance curves can be somewhat different in
accordance with condition of job site after installation.
2. Check the discharge capacity(drawing the performance curve) in test operation after installation because
discharge capacity can be changed according to piping condition and chemical’s characteristic.