The CMK series is additionally equipped with a control motor for the manual flow rate adjustment mechanism for automatic stroke length adjustment. It is used in combination with proportional control system equipment for feed forward control to turbidity, flow rate and feedback control to residual chlorine, pH, etc.
Even doing our company, we have to develop a chemical dosing pump CMK type for proportional control of the stroke adjustment method development. (Collectively the diaphragm metering pump by our spring-back method is called the CM type. Install the control motor to the manual flow rate adjustment mechanism of CM pump and possible to control auto stroke adjustment called CMK type.

●Pump model to be equipped
CM-2Y～120Y, CM-4R～6R, CM-1L～3L
● Possible to use in dual control system with speed control
In combination with speed control by use of VS motor and invertor, it is possible to use in dual control system of flow rate and concentration, and possible to have wide dosing range.

Nominal model of control motor	K-4
Manual setting devices	MCH-1C
Manual setting devices	Equipped
Type of servo motor	Reversible condenser motor with brake
Voltage / Frequency	AC 100V 50/60Hz
Output	8W
Rated revolution	60 Hz：1,450 rpm / 50 Hz：1,200 rpm
Feed-back resistance	200Ω 1.5W
Operating time	49/58 SEC（60/50Hz）
Operating angle	0-300°
Ambient temperature	-20 – +60℃
Protections	Outdoor drip-proof
Color	Munsell　2.5PB 2.5/7
Weight	5kg

Control motor circuit

Proportional controller and positioner block diagram