Stepless Speed Regulation:
The speed regulator changes the speed by manual adjustment, which is safe, reliable and infinitive flow adjustment. But the non-automatic adjustment is also troublesome. Speed regulating should be done in operation not in shut-off state.
Fix Speed Output Reducer:
The driving is easy with constant rotary speed of the rotor, which also leads to non-adjust of flow.
Variable Frequency Motor:
It realizes both automatic adjusting and infinitive adjustment of flow. It is highly automatic and has large torque in low speed.