{"product_id":"grundfos-dda-7-5-16-ar-control-digital-dosing-pump-water-treatment-variable-stroke-speed","title":"Grundfos DDA 7.5-16 PVDF AR Control Digital Dosing Pump for Water Treatment with Variable Stroke Speed","description":"\u003cp\u003eCompact low-flow precision dosing for water treatment and process systems requires a configuration that balances ease of operation with digital accuracy. This Smart Digital S variant is optimised for general service applications where precise speed control and an alarm relay interface are the primary requirements.\u003c\/p\u003e \u003cp\u003eThe unit operates on a standard 240v supply, consuming 24 W of power while delivering a maximum dosing capacity of 7.5 L\/h at a 16 bar maximum operating pressure. It features a 3000:1 turn-down ratio, allowing for smooth and continuous dosing even at flow rates as low as 0.0025 L\/h.\u003c\/p\u003e \u003cp\u003eThe hydraulic design features stepper motor technology that ensures smooth and continuous dosing. The AR control variant includes pulse input, analog 0\/4-20mA control, and two potential-free output relays, allowing for versatile synchronisation with external process equipment.\u003c\/p\u003e \u003cp\u003eConstruction features a chemically resistant PVDF pump head paired with durable PTFE gaskets and ceramic ball valves to ensure compatibility with a wide range of liquids. Housed in an IP65-rated enclosure, the unit includes two potential-free output relays for alarm signalling or integration with external control systems.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAR control variant with pulse input, analog 0\/4-20mA control and two potential-free alarm relays.\u003c\/li\u003e \u003cli\u003eInternal auto deaeration in standby mode prevents gas locks when dosing degassing chemicals.\u003c\/li\u003e \u003cli\u003e3000:1 turn-down ratio provides flexibility from 7.5 L\/h down to 0.0025 L\/h.\u003c\/li\u003e \u003cli\u003eStepper motor drive enables smooth and continuous dosing.\u003c\/li\u003e \u003cli\u003ePVDF pump head, PTFE gaskets and ceramic ball valves for chemical resistance.\u003c\/li\u003e \u003cli\u003eMultiple operating modes including batch, timer cycle and timer week.\u003c\/li\u003e \u003cli\u003eTwo potential-free output relays for alarm signalling or integration with external control systems.\u003c\/li\u003e \u003cli\u003eIP65 rated enclosure protects internal electronics in industrial environments.\u003c\/li\u003e \u003c\/ul\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":50974841274615,"sku":"93242893","price":3563.45,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-dda-7-5-16-ar-control-digital-dosing-pump-water-treatment-variable-stroke-speed.png?v=1785153925","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-dda-7-5-16-ar-control-digital-dosing-pump-water-treatment-variable-stroke-speed","provider":"Foundation Pumps","version":"1.0","type":"link"}