Grundfos DDA (XL)-FCM Smart Digital Speed Controlled Diaphragm Dosing Pump

The Grundfos DDA (XL)-FCM Smart Digital Diaphragm Dosing Pump is a high-precision, flow-verified dosing solution designed for advanced water treatment and industrial process applications where real-time flow monitoring, system feedback, and automated correction are required. This listing includes multiple DDA-FCM variants, allowing customers to select the appropriate capacity while benefiting from the same intelligent control platform.

At the core of the FCM model is Grundfos FlowControl Measurement technology, which continuously measures the actual dosed flow directly inside the dosing head. This enables immediate detection of faults such as air bubbles, empty tanks, overpressure, or line breaks, with alarms displayed in plain text. The integrated Auto Flow Adapt function automatically adjusts pump speed to maintain the target dosing rate even when process conditions change.

Driven by a brushless PMS motor and SMART Digital Dosing technology, the DDA-FCM operates at full stroke length across its entire control range. This ensures exceptional dosing accuracy, smooth discharge flow, and reliable priming—even with viscous or degassing chemicals.

The FCM control platform supports analogue 0/4–20 mA control, pulse input, batch dosing, timer functions, and fieldbus communication (via GENIbus and CIU modules), making it ideal for PLC-, SCADA-, and fully automated treatment systems. A front-mounted graphical display with click-wheel navigation provides intuitive setup, diagnostics, and operational transparency.

All variants supplied feature a PVDF dosing head, PTFE gaskets, and ceramic ball valves, offering excellent chemical resistance for aggressive treatment chemicals used in water, wastewater, and industrial applications. With an IP65 / Type 4X enclosure and industrial-grade build quality, the DDA-FCM delivers reliable, measurable, and verifiable dosing performance.

APPLICATIONS

• Water and wastewater treatment plants
• Chemical dosing with real-time flow verification
• PLC- and SCADA-controlled dosing systems
• Flow-proportional dosing using analogue control
• pH correction, disinfection, coagulation, and flocculation
• Cooling tower and boiler water treatment
• OEM dosing skids and packaged treatment systems
• Industrial processes requiring dosing validation and alarms

FEATURES

• Smart Digital diaphragm dosing pump with FlowControl Measurement (FCM)
• Integrated actual flow measurement inside dosing head
• Auto Flow Adapt to maintain setpoint under changing conditions
• Analogue 0/4–20 mA, pulse, manual, batch, and timer control modes
• Fieldbus ready (GENIbus via Grundfos CIU modules)
• Brushless PMS motor with full stroke length operation
• High turndown ratio for precise low-flow dosing
• SlowMode anti-cavitation for viscous or degassing liquids
• Auto deaeration during standby to prevent air locking
• Full-PTFE diaphragm for long service life
• PVDF dosing head with PTFE gaskets and ceramic ball valves
• Integrated level control and external stop input
• Two configurable potential-free output relays
• Analogue output 0/4–20 mA for system feedback
• IP65 / Type 4X enclosure for harsh environments

BENEFITS

• Provides verified, measurable dosing performance
• Detects and alarms dosing faults instantly
• Maintains accurate dosing despite pressure or process changes
• Eliminates need for external flow sensors
• Ideal for critical treatment and compliance-driven applications
• Reduces chemical waste and process downtime
• Seamless integration with PLC, SCADA, and BMS systems
• Backed by proven Grundfos industrial engineering

SPECIFICATIONS

Performance

• Maximum flow: 60–200 LPH (variant dependent)
• Maximum pressure: Up to 10 bar
• Turn-down ratio: Up to 1:800
• Accuracy of repeatability: ±1.5%
• Flow measurement accuracy: ±1% of set value (process dependent)
• Maximum viscosity:
  • 150 mPas (standard)
  • Up to 3000 mPas in SlowMode

Hydraulic

• Liquid temperature range: 0 to 50 °C
• Maximum suction lift:
  • Operation: up to 3 m
  • Priming: up to 1.5 m

Electrical

• Supply voltage: 1 × 100–240 V, 50/60 Hz
• Maximum power input: up to 62 W
• Enclosure class: IP65 / Type 4X
• Plug type: Australian / NZ

Compliance

• Approvals: CE, CSA-US, NSF61, RCM