DDI

Summary

Product Identification

The Grundfos ALLDOS DDI Digital Dosing™ pumps are designed for accurate and precise dosing applications. The range includes two main series:

• DDI 209: Dosing rates up to 20 l/h. Features a stepper motor drive.
• DDI 222: Dosing rates up to 150 l/h. Features a low-energy, brushless DC motor.

Both series offer a user interface for direct setting of dosing rates without complex calculations.

Key Features:

• Digital Dosing: Precise control over dosing rates.
• Full Stroke Length: Maintains optimum priming and reduces gas build-up.
• Variable Speed: Stepper motor (DDI 209) or EC motor (DDI 222) ensures smooth, even dosing by extending the discharge phase.
• Turndown Ratio: DDI 209 offers 1:100; DDI 222 offers 1:800.
• Flow Monitor (Optional): Detects dosing errors on suction and pressure sides, checks for excess pressure.
• Diaphragm Leak Detection (Optional): Differential pressure sensor (DDI 222) or opto-electronic sensor (DDI 209) sends an error signal if a diaphragm fails. DDI 222 also features a double diaphragm for process reliability.
• "Slow Mode" Function: Decelerates the suction stroke for reliable dosing of viscous media, reducing cavitation.
• Fieldbus Communication: Available with a PROFIBUS DP interface.
• Switch-Mode Power Supply: Operates worldwide within 100-240 VAC, 50/60 Hz.
• Compact Design: Smaller and quieter than conventional pumps in their class.

Materials of Construction: Available materials for wetted parts include:

• Dosing Head: PVC, PVDF, polypropylene (PP), stainless steel DIN 1.4401.
• Gasket: EPDM, FKM, PTFE.
• Valve Ball: Ceramic, Glass, PTFE, stainless steel DIN 1.4401.

Applications:

• Industrial and municipal water treatment
• Industrial cleaning
• Polymer feed
• Paper production/paper finishing
• Optical technology and chip production
• Chemical industry
• Cleaning-In-Place (CIP) and disinfection
• Galvanic and surface treatment
• Air conditioning/water treatment in cooling towers
• Reverse-osmosis systems
• Semi-conductor industry

Operating Limits

Performance Data:

• DDI 209 Series:
  • Max. pressure: 3 to 16 bar (model dependent).
  • Normal operation capacity: 0.4* to 20.0 l/h.
  • Slow mode capacity: 0.26 to 13.3 l/h.
  • Max. stroke rate: 180 strokes/min.
  • Control range: 1% to 100% of maximum dosing capacity.
• DDI 222 Series:
  • Max. pressure: 4 to 10 bar (model dependent).
  • Normal operation capacity: 60 to 150 l/h.
  • Slow mode-1 capacity: 40 to 100 l/h.
  • Slow mode-2 capacity: 25 to 62 l/h.
  • Max. stroke rate: 180 strokes/min.
  • Control range: 0.125% to 100% of maximum dosing capacity.
• Accuracy: +/- 1.5% repeatability throughout adjustable range for both series.

Suction Lift (Liquids with viscosity similar to water):

• DDI 209 Series (Max. suction lift during operation):
  • Normal operation: up to 4.0 m (e.g., DDI 2.2-16).
  • Slow mode operation: up to 6.0 m (e.g., DDI 2.2-16).
  • Normal operation with Plus3 system: up to 2.0 m (e.g., DDI 5.5-10).
• DDI 222 Series (Max. suction lift during operation):
  • Normal operation: up to 3.0 m (e.g., DDI 60-10).

Permissible Viscosity (at operating temperature):

• DDI 209 Series:
  • Normal operation: up to 200 mPa s.
  • Slow mode operation: up to 200 mPa s.
  • With spring-loaded valves, slow mode operation: up to 1000 mPa s.
• DDI 222 Series:
  • Normal operation: up to 100 mPa s.
  • Slow mode-1 operation: up to 200 mPa s.
  • Slow mode-2 operation: up to 500 mPa s.
  • With spring-loaded valves, slow mode-2 operation: up to 2600 mPa s.

Inlet and Discharge Pressures:

• Max. pre-charge pressure at pump suction side:
  • DDI 209: 1.5 to 2.0 bar.
  • DDI 222: 2.0 bar.
• Min. counter pressure at pump pressure valve: 1.0 bar for most models.

Permissible Temperature Range of Pumped Medium:

• PVC, PP: 0 to 40 °C (p < 10 bar), 0 to 20 °C (p < 16 bar).
• Stainless steel, DIN 1.4571: -10 to 70 °C (p < 10 bar), -10 to 70 °C (p < 16 bar). Short-term (15 min.) resistance to 120 °C at up to 2 bar counter pressure.
• PVDF: -10 to 60 °C (p < 10 bar), -10 to 20 °C (p < 16 bar). Increased resistance to 70 °C if counter pressure is less than 3 bar.

Environmental Limits:

• Permissible ambient temperature: 0 to 40 °C.
• Permissible storage temperature: -10 to 50 °C.
• Max. relative humidity: 92% (non-condensing).
• Sound pressure level: DDI 209: 55 dB (A); DDI 222: 65 ± 5 dB (A).

Electrical

Power Supply:

• DDI 209: 100-240 V, 50/60 Hz; 24 VDC optional.
• DDI 222: 100-240 V, 50/60 Hz.

Power Consumption:

• DDI 209: 20 VA.
• DDI 222: 50 VA.

Input Signals:

• Pulse signal: Min. pulse length: 10 ms; min. pause time: 25 ms. Load < 12 V, 5 mA.
• Remote on/off: Load < 12 V, 5 mA.
• Tank-empty signal: Load < 12 V, 5 mA.
• Current signal: Load < 22 Ohm.

Output Signals:

• Current signal: 0(4) - 20 mA, Load < 350 Ohm.
• Error signal: Ohmic load < 50 V DC/75 V AC, 0.5 A.
• Tank-empty pre-alert: Ohmic load < 50 V DC/75 V AC, 0.5 A.
• Stroke signal: Contact time: 200 ms/stroke. Ohmic load < 50 V DC/75 V AC, 0.5 A.

Mechanical / Hydraulic

Construction:

• DDI 209: Electronic stepper-motor-driven. Discharge stroke via eccentric, suction stroke by spring.
• DDI 222: Low-energy, brushless DC motor driven. Speed reduced by belt drive. Both suction and discharge strokes generated by the motor.

Dosing Head Variants:

• Manual deaeration valve.
• Plus3 system (P3): Auto-deaeration and calibration system for moderately volatile media (e.g., sodium hypochlorite). Includes a priming/deaeration chamber and integrated calibration column.
• Diaphragm leak detection: Flange for opto-electronic sensor.

Enclosure Class: IP 65.

Weights:

• DDI 209 (PVC, PVDF, PP): 2.3 - 3.0 kg.
• DDI 209 (Stainless steel): 3.5 - 3.6 kg.
• DDI 222 (PVC, PVDF, PP): 5.0 - 6.5 kg.
• DDI 222 (Stainless steel): 7.0 - 12.0 kg.

Connections: Various tube and threaded connections are available, including:

• Tube: 4/6 mm, 5/8 mm, 6/9 mm, 9/12 mm, 19/27 mm, 1/8" / 1/4", 1/4" / 3/8", 3/8" / 1/2", 6/12 mm, 13/20 mm.
• Threaded: Rp 1/4, Rp 3/4, 1/4" NPT, 1/2" NPT (male), 3/4" NPT (female), 3/4" NPT (male).
• Welding diameter: 16 mm, 25 mm.

Control and Functions

Control Variants:

• AR: Standard.
• AF: AR with flow monitor.
• AP: AR with PROFIBUS.
• APF: AR with flow monitor and PROFIBUS.

Operating Modes:

• Manual control: Set flow rate directly in l/h or gal/h.
• Pulse control: Doses a set quantity per received pulse. Memory stores up to 65,000 pulses.
• Analog control: Dosed quantity proportional to 0-20 mA or 4-20 mA current input signal.
• Batch mode: Doses a defined batch quantity with a defined flow, triggered manually or by pulse.
• Timer batch: Doses a set batch quantity at preset intervals.
• Slow mode: Reduces suction stroke for viscous media, available in any operating mode. DDI 222 has two stages: Slow mode 1 (66% of max flow) and Slow mode 2 (41% of max flow).

Electronic Functions:

• Continuous operation (for functional test, self-priming, deaeration).
• Two-stage, tank-empty signal (requires separate sensors).
• Password protection of settings.
• Calibration function.
• Dosing quantity counter with reset.
• Tamper-proof operating hours counter.
• Remote on/off.
• Hall sensor for motor monitoring (detects blocked motor).
• Pressure limitation (DDI 222 only): Pump switches off automatically at user-defined pressure.

Pumped Media

The datasheet provides a general guide on material resistance (at room temperature) to various media. This table cannot replace actual testing under specific working conditions. Factors like purity, temperature, and abrasive particles may affect chemical resistance.

Examples of Media and Material Resistance (at 68°F):

• Acetic acid (CH₃COOH): Resistant with PP, PVDF, Stainless steel, PVC, PTFE, Ceramic, Glass at various concentrations. FKM has limited resistance or is not resistant at higher concentrations.
• Aluminium chloride (AlCl₃) 40%: Resistant with PP, PVDF, PVC, FKM, EPDM, PTFE, Ceramic, Glass. Stainless steel is not resistant.
• Ammonia, aqueous (NH₄OH) 28%: Resistant with PP, PVDF, Stainless steel, PVC, EPDM, PTFE, Ceramic. FKM and Glass have limited resistance or are not resistant.
• Calcium hypochlorite (Ca(OCl)₂) 20%: Resistant with PVDF, PVC, FKM, EPDM, PTFE, Ceramic, Glass. PP has limited resistance.
• Hydrochloric acid (HCl) <25%: Resistant with PP, PVDF, PVC, FKM, EPDM, PTFE, Ceramic, Glass. Stainless steel is not resistant.
• Sodium hypochlorite (NaOCl) 20%: Resistant with PVDF, PVC, FKM, EPDM, PTFE, Ceramic, Glass. PP has limited resistance.

See the official PDF for exact tabulated values and footnotes regarding specific conditions (e.g., risk of crystallisation, reactions with water, fluoride-free requirements).

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF. For contractual data, always refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

Lenntech datasheet mirror