Grundfos DDE (XL)-B Speed Controlled Diaphragm Dosing Pump

The Grundfos DDE (XL)-B Smart Digital Diaphragm Dosing Pump is a cost-effective, digitally controlled dosing solution designed for applications where reliable chemical dosing is required without external control signals or automation. This listing includes multiple DDE-B variants, allowing users to select the appropriate flow and pressure capacity while maintaining a simple, robust control philosophy.

Based on Grundfos SMART Digital Dosing technology, the DDE-B uses an internal stepper motor drive to operate at full stroke length across the entire adjustment range. This ensures stable dosing accuracy, smooth discharge flow, and dependable priming—even when handling degassing liquids.

Dosing flow is adjusted manually via a front-mounted logarithmic control dial, allowing precise output adjustment from 0.1–100%. The variable-speed operation ensures consistent chemical delivery while keeping energy consumption low.

All variants supplied feature a PVC dosing head, PTFE gaskets, and ceramic ball valves, providing excellent chemical resistance for common water treatment and industrial chemicals. With an IP65 / Type 4X enclosure, integrated deaeration valve, and compact footprint, the DDE (XL)-B range is well suited for standalone dosing duties in water treatment, irrigation, and industrial process systems.

APPLICATIONS

• Water and wastewater treatment chemical dosing
• Standalone chemical injection systems
• Irrigation fertigation and disinfection dosing
• pH correction and water conditioning
• Cooling tower and boiler water treatment
• OEM dosing skids requiring manual adjustment
• Industrial process water dosing

FEATURES

• Smart Digital diaphragm dosing pump with manual speed control
• Internal stepper motor drive with full stroke length operation
• Manual dosing adjustment from 0.1–100% via logarithmic dial
• Smooth, continuous discharge flow
• Integrated deaeration valve for easy commissioning
• Full-PTFE diaphragm for long service life
• PVC dosing head with PTFE gaskets and ceramic ball valves
• Compact design with flexible mounting orientation
• Transparent cover protecting control elements
• IP65 / Type 4X enclosure for harsh environments
• Energy-efficient operation

SPECIFICATIONS

Performance

• Maximum flow: 60–200 LPH (variant dependent)
• Maximum pressure: Up to 10 bar
• Turn-down ratio: 1:800
• Accuracy of repeatability: ±5%
• Maximum viscosity: 100 mPas

Hydraulic

• Liquid temperature range: 0 to 40 °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: 62 W
• Enclosure class: IP65 / Type 4X
• Plug type: Australian
• Cable length: 1.5 m

Compliance

• Approvals: CE, CSA-US, NSF61, RCM

BENEFITS

• Simple, reliable dosing without external control systems
• Cost-effective solution for essential dosing applications
• Accurate and stable dosing across a wide flow range
• Easy setup and adjustment via manual control dial
• Excellent chemical resistance for common treatment chemicals
• Compact, robust design suited to retrofit installations
• Proven Grundfos reliability and build quality