Xylem Flojet AD4/90 Multi-chamber diaphragm pump

The Xylem Flojet AD4/90 multi-chamber diaphragm positive displacement pump is designed for transfer, demand/delivery, filtration, high flow booster, carbonation, beverage dispense and continuous reverse osmosis applications. Its maximum flow rate is 3L/min. New multi-chamber technology with patented valve design overcomes vibration and hydraulic pulsation. AD4/90 continues to running in closed valve conditions liquid being recirculated via an internal bypass valve. AD500 ceases to running in closed valve conditions as it is fitted with a pressure switch. 

The supply voltage rating is 230V

Input power is 55W

Maximum working pressure is 20bar

Maximum Fluid temperature is 77°C

https://nl.rs-online.com/web/p/positive-displacement-pumps/4463483