Dositec DOSTEC® AC3-900 Advanced Control Piston Chemical Dosing Pump

The DOSTEC® AC Piston is an advanced automatic dosing pump designed for accurate chemical dosing in water treatment, chemical processing, food, agriculture and industrial applications. It is suited to applications requiring precise dosing with higher pressure capability, depending on the selected model.

The DOSTEC® AC range covers flow rates from 3 to 1200 L/h, with pressure up to 20 bar. Piston models are available from small low-flow versions through to high-flow models up to 1200 L/h, depending on the configuration.

The DOSTEC® AC includes manual dosing, analogue 0/4–20mA control, proportional dosing from flow rate, proportional dosing by pulses, batch dosing by volume, batch dosing by time and ModBus RTU control.

The piston version uses a mechanical piston dosing head, available in materials such as PEUAPM, ceramic or stainless steel 316L, depending on the selected model. It is generally selected where piston-style metering is preferred for the required flow, pressure and chemical compatibility.

The DOSTEC® AC can be supplied with PP, PVDF or stainless steel 316L wetted parts. Valve ball options include borosilicate, stainless steel 316 and ceramic, with seal options including FPM, EPDM and Aflas.

Yes. The pump can dose proportionally from a water meter or flowmeter pulse signal. It supports X:Y pulse mode for low-frequency pulses and %/ppm flowmeter mode for higher-frequency signals.

Yes. In analogue mode, the DOSTEC® AC can dose proportionally to a 0/4–20mA input signal, making it suitable for use with sensors, process controllers, PLC systems and automated dosing systems.

Yes. The DOSTEC® AC supports RS-485 ModBus RTU control. The listed communication settings include RS485 half-duplex A, B and GND, 9600 baud rate, 8 data bits, no parity and 1 stop bit.

The DOSTEC® AC includes alarms for level, flow failure, leakage and overpressure. It also provides real-time monitoring, counters, 4–20mA output, pulse output, alarm relay output and level alarm output.

The pump should be mounted vertically on a rigid surface, protected from water and heat, with adequate ventilation. The hydraulic installation should include a 150 micron suction filter, injection check valve and a pressure relief valve installed close to the pump to protect against overpressure.