Motor Driven Diaphragm Metering Pumps
Metering pumps with mechanically linked diaphragms are almost universally applicable in the low pressure range. They offer a favourable cost/performance ratio at minimum service effort.
High dosing accuracy and robust technology
Function
The rotation of an electric motor is transferred through a worm gear and converted to a stroke movement via an eccentric cam. The link rod transmits this stroke movement to the dosing diaphragm in the liquid end. Two non-return valves prevent backflow of the dosing medium during the pumping process. The dosing capacity of a motor-driven diaphragm metering pump can be adjusted via the stroke frequency – in this case the motor speed – and the stroke length.
Applications
- General: chemical dosing up to over 1,000 l/h
- Potable water treatment: dosing of disinfectants
- Cooling water circuits: dosing of disinfectants
- Wastewater treatment: dosing of flocculants
- Paper industry: dosing of additives
- Plastics manufacturing: dosing of additives
Features
- Extremely wide capacity range
- High dosing accuracy even with fluctuating pressure conditions (characteristic curve has flat response to changing pressure) ensures savings on chemicals and precise process control
- Robust, attractively priced drive in the higher capacity range
- Simple integration and retrofit in automated processes through flexible control via stroke length and motor speed regulation
- Optimum safety ensured by the multi-layer safety diaphragm with diaphragm rupture display or signaling as well as by the integral overload protection
