Duff Co. offers a full range of pumps for residential, commercial, and industrial uses including components that will fit any customer need. We carry valves and parts from all major manufacturers, including our proprietary DWC line. And we also carry service kits and accessories and perform custom fabrication. We are one of the most trusted pumps distributors in the Mid-Atlantic region, and we can source even the hardest-to-find parts. For more information, contact us today.
The Grundfos MP204 offers superior electronic motor protection for pumps such as the Grundfos CR through the MP 204. This single unit protects all electrical motors from 3-999 amps and voltages from 100 to 480 VAC. The MP 204 protects pump motors against under-voltage, over-voltage and variations in power supply, ensuring steady performance and protection against overheating which can reduce pump life.
Grundfos MP 204 Pump Motor Protection
The unit measures load, temperature, power, over- and under-voltage, ground failures, current voltage, phase missing caused by wear or mains cable faults, and phase sequence. Other monitoring factors include harmonic distortion, run and start capacitor (single-phase), operating hours, and number of starts.
This easy-to-use unit protects your pump 24 hours a day and allows for energy consumption monitoring.
Installation is easy. Simply slide it into place on a mounting rail or attach it to any wall or backplate with four screws.
The Grundfos MP 204
The unit can be set up in under two minutes and can be configured with the Grundfos GO app. With the additional MI301 Grundfos Go dongle, it can be connected virtually to any SCADA system, allowing remote access to pump data. Remotely control the pump, change settings, see energy consumption and current conditions and alarms. Grundfos iSolutions allows for wired or wireless connectivity and web access through the Grundfos Remote Management System (GRM).
By connecting directly to the Grundfos MP204, you can achieve superior motor protection while configuring limits, trip points, delays and more. See detailed alarm and warning information. View pump run times and starts. Copy and save settings from one unit to another. Read, print and/or email performance reports.
MP 204 Technical Data
Enclosure class: IP 20
Ambient temperature: ÷20 to 60C
Relative humidity: 99 %
Voltage range: 100-480 VAC
Current range: 3-999 A
Frequency: 47-63 Hz
IEC trip class: 1-45
Special Grundfos trip class: 0.1-30 s
Voltage variations: ÷25/+15 % of nominal voltage
Approvals: EN 60947, EN 60335, UL/CSA 508
Marking: CE, cUL, C-tick
The MP 204 monitors load, temperature, current operating conditions and more.
High-pressure washdown systems are vital to food processing plants and manufacturers. But durability, efficient operation, and cost-effective maintenance are hard to obtain. Pitot tube and positive displacement pumping are things of the past. The Grundfos Hydro HP is a better way to run a washdown system. It offers full ROI in just a few maintenance cycles.
The Grundfos Hydro HP
This high-pressure boosting system offers more reliable and energy-efficient washing and cleaning. With industry-leading CR vertical multi-stage inline pumps, the Hydro HP offers bulletproof reliability and superior hydraulic performance in a space-saving footprint, and the integrated VFD control offers consistent system pressure.
Whether you require one spray wand to clean or need a full facility washdown, this pump does it all without recirculation lines. An integrated VFD control and low-flow jockey pump maintain consistent system pressure to meet low-flow cleaning demands.
And, with the easily serviced Grundfos Hydro HP, plants can expect to realize full ROI after the first few maintenance cycles.
Efficient Design
The Hydro HP uses minimal energy—unlike pitot tube pumps which run constantly to meet high pressure needs. With cascade control, integrated VFDs, and pump design, the Grundfos Hydro HP dramatically reduces energy use without sacrificing performance.
No recirculation line needed for consistent pressure
Integrated variable frequency drive adapts to system demands
Vertical multistage pumps designed for maximum efficiency
Reliable Engineering
Built to minimize wear — unlike pitot tube pumps, which push water through a small opening at a high velocity, causing faster deterioration. This industry-leading boosting system is engineered with reimagined features to increase reliability and decrease downtime.
Lower vibration minimizes wear and tear
State-of-the-art testing before leaving the factory
Single-source responsibility, with all parts designed to work together
Easy Maintenance
Most maintenance can be done in-house when needs arise — unlike pitot tube pumps, which can require frequent and costly off-site servicing.
Shaft seal can be replaced in minutes without removing the motor
Rotating assembly stacking kit allows for easy replacement
Stenner metering pumps are available in a wide variety of configurations for nearly every application. Stenner’s Classic Series electromechanical peristaltic pumps are available in single- and double-head configurations. Both pumps are available adjustable or fixed.
The Classic Series electromechanical peristaltic metering pumps
StennerSingle Head Adjustable Output Pump
Stenner Single Head Adjustable Output Pump
The Single Head Adjustable Output Metering Pump is ideal for treating problem water by injecting solutions for pH control, to oxidize iron, manganese or hydrogen sulfide for filtration removal. This Stenner Metering Pump can help prevent Legionella in water conditioning applications, industrial processes, wastewater and water treatment, and in cooling towers and irrigation. It can be used for disinfection, pH control, corrosion control, scale control, and oxidation. This single head adjustable output pump is ideal for horticultural use, in the metal finishing industry, and for commercial pool use for equipment maintenance and swimming water sanitizing.
StennerSingle Head Fixed Output Metering Pump
Stenner Single Head Fixed Output Pump
The Classic Series Single Head Fixed Pump injects solution at a fixed rate. It controls pH, oxidation, corrosion and scale, and in proportional dosing applications, it can disinfect drinking water. It can also sanitize swimming pool water in conjunction with a controller, as it conforms with ANSI/NSF standard 50 when used with ANSI/NSF 50 listed controllers.
StennerDouble Head Adjustable Output Pump
Stenner Double Head Adjustable Output Pump
The Classic Series Double Head Adjustable Pump is similar in build to the single head adjustable pump, with the addition of a second pump head which doubles output. The pump can inject two compatible solutions at the same ratio with solutions such as polyphosphates, acid, sodium hypochlorite, and biocides for applications such as disinfection, pH control, corrosion and scale control, sanitation, and oxidation. As such, they are ideal for commercial pool and aquatic facilities and municipal wastewater and water treatment plants because they provide twice the output.
StennerDouble Head Fixed Output Pump
Stenner Double Head Fixed Output Pump
The Classic Series Double Head Fixed Pump can inject two compatible liquids at the same ratio. This pump is commonly used on large commercial swimming pools, wastewater and water treatment plants. It runs at a 100% fixed flow rate output and can be installed to an ORP type controller to manage output.
StennerEcon FP Pump
Stenner Econ FP Pump
The Stenner Econ FP Pump is a compact flow activated peristaltic pump designed for light duty applications. It is ideally suited for the disinfection of drinking water or adjusting the pH in residential or farm private water wells, and is commonly used animal health applications such as poultry hatcheries.
The wall-mountable, enclosed housing carries cULus for indoor and outdoor use. In outdoor and wet environments, the pump must be mounted vertically. Mounting accessories are also available.
There are three operating modes accessible through the control panel: Seconds, Flow Switch, and Auxiliary and their optional percentage settings. To prevent tampering, the six-button, backlit LCD window requires two button operation and locks after 60-seconds of idle time.
The pump operates at 30 gpd, 25 psi, at a set time or speed, and is activated by dry contact signal or 12-24 VAC/VDC signal. It is flow activated from a water meter, control valve, flow switch, or from any other control equipment that can respond to flow. The Econ FP can inject solutions into water or disinfect water lines with acids, chlorine dioxide, or chlorine.
Advantages:
No contact between solution and moving parts
No valves required, allowing for easy maintenance
No foot valve required. Self-priming against max working pressure.
The new generation of Grundfos CR pumps has been designed for maximum energy efficiency and performance across the board, from superior hydraulics to little innovations like profiling the leading edges of vanes and introducing a flow-guiding system to eliminate eddies and turbulence.
The result is a pump range that offers world-class energy efficiency, beating its already outstanding forerunners out of the blocks.
For the largest pumps (100+ hp), Grundfos developed a Thrust Handling Device (THD) that improves motor service life and allows for the use of standard motors by using discharge pressure to balance the axial thrust load.
Flanges: A wide selection ensures the CR can be mounted in any type of pipework.
Pump Base: Optimized inlet with minimal pressure loss lowers the requirements for NPSHr significantly, allowing for much more compact system designs. The optimized outlet port improves hydraulic efficiency and overall pump performance.
Chamber: The guide vanes feature a profiled leading edge to reduce turbulence and prevent energy loss.
Seal Rings: New rings reduce pump recirculation to improve efficiency.
Impeller: Optimized for maximum efficiency through extensive simulation-driven design.
New Shaft Seal: All large CR pumps use a new field-proven cartridge shaft seal which is durable and easy to replace.
Top Cover: New cupped cover minimizes recirculation by guiding liquid away from the center of the chamber stack.
Multipump Solutions
If your application has great fluctuations in demand or rare high peak flow demands, consider Cascade Control. The CR range is the backbone of HYDRO MPC Booster Systems, available in configurations with up to six CR pumps, allowing for flows up to 8,453 gpm.
Performance Control
Improve energy efficiency by controlling pump performance.
CR pumps up to 30 HP can be fitted with integrated drives (CRE) or stand-alone drives (CUE). The CUE drive is optimized for pump operation and available in all voltages and frequencies.
The the larger CR/CRN range pumps, Grundfos offers plug-and-play drives customizable to your needs.
Customized CR Pumps
Contact your Duff Co. representative to customize a CR pumps for any variety of needs, including:
Pressure boosting for domestic and light industrial water supplies has never been easier.
The Grundfos SCALA1 is an all-in-one unit, designed for pressure boosting for pumping from a roof tank, break tank, or ground tank. It is also idea for use with shallow wells (less than 8 m) and for city mains water.
SCALA1 features an integrating pump, motor, diaphragm tank, pressure and flow sensor, dry-running protection, controller, and non-return valve.
Installation is easy! Simply connect the pipes, prime the pump, and plug it in. Commissioning can be done straight from the pump control panel. Advanced settings are available online through the GO REMOTE app.
The integrated Bluetooth connection and Grundfos’ GO REMOTE app allow you to see alarm status and easy pump diagnostics. Monitor, trouble-shoot, and control the pump right from your smartphone. Create and email reports onsite and access hard-to-reach installations remotely via the app.
If greater flow is required, a twin pump setup is available with accessories, including a baseplate, cable and inlet and outlet manifolds. Twin pump connection with joint pump control can be made in either duty/assist or duty/standby mode with online configuration through the GO REMOTE app.
Features:
A high-efficiency motor and hydraulics
Low noise operation
Bluetooth communication for use with the Grundfos GO REMOTE
Ideal for:
Domestic
Greenhouses
Irrigation
Car Washes
Produce (fruit and vegetable) sections in supermarkets
The Grundfos SCALA2 pressure boosting pump is designed for one- and two-family houses with up to three floors and eight tapping points.
The SCALA2 is ideal for boosting city mains water, water from roof tanks, break tanks, ground tanks, and shallow wells of less than 8 m.
This fully integrated self-priming compact waterworks incorporates integrated speed control to ensure perfect pressure at the taps. The Variable Frequency Drive (VFD) makes the pump slow and speed up as needed.
Installation is easy. Simply connect the pipes, prime the pump, and plug it in.
Grundfos SCALA2 comes with all the components necessary to ensure a comfortable pressure: • intelligent controller • integrated speed-controlled drive • integrated pressure tank • integrated sensors • integrated non-return valve
Grundfos’ new N-Series pumps are available in three different end-suction models: the frame-mounted NK, close-coupled NB and split-coupled NBS.
No couplings to align!
Incorporated motor drive!
Easy seal change that eliminates the need to remove the pump from the piping!
With industry-leading efficiencies that future-proof the pumps against government efficiency regulations, the NBS is designed to make installation faster, improve efficiency and reliability, and be easier to service throughout the pump’s life.
The NBS features a footprint up to 35% smaller, a lifetime guarantee, back-pull out design, and a new hard-faced seal that improves reliability and reduces servicing costs.
Installation
No baseplate or grouting required reducing installation costs
No alignment required between the pump and motor with our Lifetime Alignment Guarantee — eliminating laser alignment costs and reducing installation time
Optimized, space-saving design has up to a 35% smaller footprint compared to traditional frame-mounted design pumps
Top centerline discharge design allows for self-venting and more compact piping designs
Efficiency and Reliability
Industry leading efficiencies you can count on, because of advanced Computational Fluid Dynamics (CFD)
New Silicon Carbide (SiC) / Silicon Carbide (SiC) hard faced seal’s robust design offers increased temperature range, better abrasives handling and longer life versus standard designs (standard on all N-Series pumps)
Backed by our Lifetime Alignment Guarantee so you never have to worry about undue wear and tear on mechanical seals, bearings and energy losses due to misalignment
Optimized, stainless-steel impeller design increases efficiency and reduces NPSH required
Balanced impellers reduce noise and vibration for quiet operation and prolong seal and bearing life
4″ and above models have a internal dual-volute design for increased efficiency, lower life-cycle costs and prolonged seal and bearing life
Integrally cast diffuser vane reduces turbulence
Serviceability
Foot-mounted volute for increased pump stability
Spacer-coupling design allows for back pull-out and easy access to mechanical seal without removing the motor or disturbing piping
Applications
HVAC (Cooling/Heating)
District Energy
Industrial
Water Utility
Technical Data
FLOW, Q:
max. 5,800 gpm
HEAD, H:
max. 450 ft
LIQUID TEMPERATURE:
-13°F to 248°F (Optional: 284°F)
WORKING PRESSURE:
max. 232 psi (Optional: 362 psi)
HP RANGE:
max. 250 hp
SPEED:
3600, 1800, and 1200 RPM
DISCHARGE SIZES:
1.25 to 10 in. • Centerline: 1.25–6 in • Tangential: 8–10 in
The Grundfos SMART line of digital dosing pumps perfects state-of-the-art technology with patented solutions, responding to modern developments in water treatment chemistry with intelligent dosing pumps, advanced drives, new controls, and adjustment mechanisms.
Grundfos couples advancements in technology with enhanced user-comfort, intelligent flow control, and features that provide reliable, cost-effective, and precise processes.
The powerful, variable-speed stepper motors improve upon traditional technologies such as stroke length / stroke frequency adjustment with solenoid drive or synchronous motors. And the click-stop mounting plate provides unique mounting flexibility. The entire dosing range up to 8 gph is covered by only a few pump variants to make choice and installation even easier.
The result:
Low operation costs
Longer maintenance intervals
High dosing accuracy
Saves chemicals with FlowControl
Saves energy with the latest drive technology
Lower maintenance costs thank to universal chemical resistance of the full-PTFE diaphragm and digital dosing
Saves natural resources with new composite materials and sustainable production processes
Modularity: The click-stop mounting plate allows for easy, flexible installation.
Simplicity: Easy to install, commission, and operate.
Flow Intelligence: When the FlowControl function is activated, the dosing process of the liquids is monitored by the pump, offering advanced process reliability with accuracy of 1% of setpoint.
DDA Models
High-end solution for complex and demanding applications
Flow and pressure up to 8 gph and up to 232 psi
Auto-deaeration during pump standby
Flexible Fieldbus control
Turn-down ratio 3000:1 with constant 100% stroke length
Max. 30 l/h and 16 bar
FlowControl with selective fault diagnosis
Batch modes (timer- or pulse-based)
Optional E-box for Profibus DP integration
DDC Models
The optimum solution for common applications.
Easy-to-use interface with click wheel to make setup and operation simple.
Flow and pressure up to 4 gph and up to 145 psi
Two SlowMode functions (25% and 50%), calibration mode, service display
External stop, dual-level tank control
Max. 15 l/h and 10 bar
Turn-down ratio 1:1000
Graphical LC display backlit in different colors
Standard operation modes, e.g. pulse and analog
2 integrated relay outputs
DDE Models
Digital Dosing with basic functions even for low budget applications
Two (2) pump models cover the entire range
Flow and pressure from 0.0015 to 4 gph and up to 145 psi
Control options: manual control 0.1-100%, pulse in % of stroke volume
External stop, empty tank alarm
Max. 15 l/h and 10 bar
Turn-down ratio 1:1000
Smooth continuous dosing
Always 100 % suction stroke
Simple pulse operation mode
Applications
• Disinfection and pH adjustment • Drinking water, process water and wastewater • Food and beverage • Clean-in-place • Ultrafiltration and reverse osmosis • Boiler feed water • Cooling towers • Coagulation, flocculation, precipitation • Chemical industry • Car wash • Irrigation • Anywhere chemical treatment and conditioning of water is required
DIGITAL DOSING PUMPS: Grundfos DME
The Grundfos DME Digital Dosing Pumps combine all the benefits of the smaller digital dosing range for use with large dosing quantities from 15.9 to 248 gph.
Key Features:
Ideal for water supply, wastewater, and water treatment applications – this wide dosing range offers a turndown ratio of 800:1.
Easy to install – Set the pump to discharge the exact quantity of dosing liquid required
Profibus interface – receive supply performance data and status information for quality control and preventative maintenance.
Dosing Head Variants – available in stainless steel, PVDF, and environmentally friendly, cost-efficient polypropylene
Simple display – easily navigate menus, view control features such as pulse, analog, timer, batch, calibration, anti-cavitation control, and more.
Anti-cavitation: Slow suction stroke speed 75%, 50%, or 25% to handle viscous fluids
The DME pump uses a full stroke length every time, with carefully timed speed to ensure even concentration and optimal priming throughout the entire operating range.
Overload protection – monitors pump counter pressure to protect against high pressure loads
Applications
• Drinking water treatment • Water distribution • Wastewater transport • Wastewater treatment • Pulp and paper • Textile industry
s::can DID DIGITAL INSTRUMENTATION FOR DOSING
The perfect combination of digital sensor technology and Grundfos’ expertise in controlling dosing and disinfection, the DID system is designed to match Grundfos’ dosing pumps, gas dosing systems, and systems for the generation and dosing of chlorine dioxide and hypochlorite.
Available as compact systems with bypass flow cell or as kits for tank-immersed sensors. Easy to set up, with pre-assembled and pre-calibrated configurations. Easy to install with Fieldbus-based communication with both controller and sensors.
Key Features:
Automatic setting of water flow and detection of missing water flow in systems with flow cell
Includes probe carrier, probe guard, and 25 foot cable for tank installation systems
Temperature compensation included for all sensors
Designed for extra-long maintenance intervals (0.5 to 1 year)
Pre-calibrated sensors (pH, ORP, conductivity)
One sensor variant per parameter for all applications and measuring ranges (pH, ORP, conductivity sensors)
Diaphragm-covered amperometric sensor principle (free and total chlorine, ClO2, H2O2 and PAA)
Lowered pH dependency for free-chlorine sensors
Applications
• Drinking water treatment • Industrial process water and wastewater treatment (effluent disinfection): pH control for dosing acids and alkalis and control of chlorine, chlorine dioxide or ozone • Food and beverages: disinfection in filling tanks and CIP applications • Swimming pool water treatment: pH control for dosing acids and alkalis, monitoring and control of residual chlorine
Grundfos Skid Systems: DSS
If you need pre-engineered floor or panel dosing packages, trust the Grundfos DSS Skid System. Offering integrated controls and various pump configurations, the skid system is designed to accurately meter liquid chemicals and, at its heart, is the DSS metering pump. Hydraulically actuated and mechanically actuated pumps that feature SMART digital dosing with stepper motor technology offering up to 3000:1 flow turndown.
Custom Engineered to Order (ETO) skid systems are available for project-based work, constructed in nearly any configuration to include any Grundfos dosing pump.
Key Features:
Grundfos SMART Digital Dosing pumps provide precise performance and reliability in a complete solution
Available in one, two and three pump system configurations
Easy installation with plug and pump solutions
Fast delivery, even for customized skids, with pre-engineered systems
Factory tested to the highest standard
Flexible installation with floor and wall mount options
User friendly panel options include: junction, HOA, plug only, and none
Control cables options include: analog/pulse/stop input, relay output and analog output
Durable materials include PVC/CPVC pipe and EPDM/Viton gaskets
The SQ pump is Grundfos’ most compact submersible pump for ground water extraction. A mere 3” in diameter, the long, lean pump fits nicely into small boreholes of the same size – or in 4” boreholes that over time have become smaller. The compact design, along with key features like dry-run protection and soft start to reduce wear on motor, makes the SQ pump one of the most reliable choices for submersible operation.
The Grundfos SQ has been a stellar performer since its introduction in 1999, boasting the following unique features:
3” Diameter and light weight – for ease of installation, especially in narrow or corroded wells
Wider voltage range than a traditional 4” 2-wire 230-volt pump and motor
Softstart
Higher efficiency and lower amp draw than a traditional 4” pump and motor
Integrated protections inside every pump: dryrunningprotection, overloadprotection, voltageprotection, and over temperature protection.
LOSE AN INCH . . .
At only 2.9” in diameter and a weight of only 14.8 lbs, the SQ submersible pump is extremely compact and ideal for all wells 3” and larger. In addition to the features and benefits shared with the renowned SP submersible pump, the SQ offers a number of motor protection and wear-reducing features that makes it the obvious choice for groundwater extraction for residential wells, for irrigation systems, or for groundwater lowering. In the big picture, this pump will save you time–and money!
Benefits
Compact & very light weight
Will fit in all 3” and larger wells
Suitable in wells where deposit prevent replacement with a 4” pump
Best build-in protection features
Has a high efficient permanent magnet motor
Get more business!
Grundfos SQ 3″ submersible pumps are suitable for both continuous and intermittent operation for a variety of applications:
Ground water supply – private housing, small waterworks, small irrigation systems
Liquid transfer in tanks
Pressure boosting
Environmental applications – remedial pumping or sampling
For all of these reasons, more and more pump professionals are turning to the 3″ Grundfos SQ pump. Contractors spend more time working on their business than pulling defective pumps.
Deliver powerful, reliable operation with the Grundfos 3” SQ submersible:
A lightweight, reliable pump with 20 year performance record
Easily installed in a 4” well that will no longer accommodate a 4” nominal O.D pump
Built in soft start, dry run protection and over/under voltage protection
Broadest operational voltage range (150 to 280) in the industry – reducing call backs
Operates like a conventional 2 wire pump
Contact Duff today to cross-reference the SQ pump from your 4″ pumps–the pricing is now right to make the switch!
Fully integrated, the new self-priming Grundfos SCALA2 is designed to boost water pressure from city mains, shallow wells and storage tanks serving residential buildings with up to three floors and eight taps. An intelligent pump control sensor compares measured and desired water pressures, adjusting pump speed accordingly and ensuring a perfect water pressure through the system. The plug-and-pump solution has a user-friendly control panel to enable manual pressure adjustments.
We now have a full stock of the SCALA2 pumps at our Norristown World Headquarters. We’re thrilled about this new product, and below are the top reasons you should be too. In the meantime, call or email usabout this exciting product.
https://www.youtube.com/watch?v=xGtpB51yq3A
1. Ease & Simplicity
Quick and easy installation in just three steps: connect the pipes, prime the pump and plug into the power outlet.
Simple Selection
One model to suit most domestic applications makes selection easy.
User Friendly
The easy-to-use control panel features LED indicators displaying power status, pressure setting and alarm indicator lights.
Protective Functions
To protect the pump and help ensure a long life, a range of protective features are incorporated into the pump such as; dry-run protection, anti-cycling alarm, auto-reset and maximum continuous operation time (30 mins).
Easy Installation
Quick and easy installation in just three steps: connect the pipes, prime the pump and plug into the power outlet.
Integrated Non-Return Valve
No additional non-return valve required – plug and pump solution.
2. True Constant Pressure
In a compact and affordable package, you can now install a pump with integral variable speed drive. This allows true constant pressure: The pump adjusts performance according to water demand, providing constant pressure to all taps regardless of variations in demand or inlet pressure.
3. Energy Efficiency
The pump features a permanent magnet motor to help reduce power consumption while the frequency controller matches the power consumption with the required water output, also helping to conserve energy and reduce energy bills.
4. Quiet Operation
While water boosting pumps can often be large and noisy, the compact, all-in-one SCALA2 weighs only 22 Ibs. and has a super-silent motor that is water-instead-of-fan-cooled, which results in a sound level of 47 dB(A), which is roughly as loud as a modern dishwasher.
5. Self-Priming
Ideal for pressurizing water from above or below ground water sources with a suction lift of up to 13 feet and self-priming up to 26 feet.
Here are the specs on the SCALA2:
Compact, easy to install and providing perfect water pressure: the SCALA2.
Finally, please contact our pump experts today for any questions on this or other pumps. We’re fully versed on this and many other pumps, prepared with the solution for your application.
“These pumps are slick as snot.” That’s what one customer recently said after he first tried a Grundfos chemical feed / metering pump. Without question, these pumps are smart, easy-to-use, extremely versatile and as precise as Steph Curry with an open look at a corner three-pointer.
FTW
While we offer many other brands – including Stenner, Pulsafeeder and Chem-Tech – we have found our customers love the ease, reliability and precision that Grundfos’ unique stepper motor provides. All SMART Digital pumps are equipped with the gentle yet powerful stepper motor, which completely eliminates stressful starts and stops while allowing a continuous feed.
Grundfos DDE Chemical Dosing Pumps
Grundfos “DDE” Meterring Pump
The complete line of Grundfos chemical dosing pumps is extensive, but I want to dedicate some ink to one specific pump. We have found that Grundfos’ “DDE 6-10” dosing pumps are the perfect fit for many water treatment dealers, chemical water treaters and OEMs. The DDE 6-10 doses up to 4 gph. Each pump comes with a ¼” installation kit (tubing, foot valve, and injector); has an adjustable flow range from 0.0015 to 1.5 GPH (1000:1 turndown) up to 150 psi; and is available in either a “Basic” (manual control only) or “Pulse” configuration (pulse, remote off/on, and solution level sensor).
Accuracy & Flexibility
Indeed, all Grundfos SMART Digital Dosing pumps operate with this stepper motor (which also, incidentally, features a universal power supply (1×100-240VAC, 50/60 Hz)). This allows exceedingly precise dosing accuracy, as any potential deviations in dose rate are automatically corrected by the stepper motor’s speed regulation mechanism. This unique design significantly reduces pressure peaks, prevents mechanical stress on wearing parts like the diaphragm, tubing and connections. The integrated flow measurement function on these little pumps is so precise, in fact, you won’t need any additional measuring equipment.
Perhaps most impressive, the stepper motor design allows the pump to always operate a full stroke length, even at small flow rates, and irrespective of the capacity set; because the stepper motor is always operating at full stroke length, each stroke ensures maximum volume displacement per stroke, optimum accuracy and easy priming.
Reliability
Because the stepper motor prevents any harsh banging you see in other pumps, the Grundfos pump requires minimal maintenance. In fact, their operation is so quiet, you likely won’t be able to hear it operate in a boiler or mechanical room. The only maintenance we recommend is taking out the ball checks and diaphragms and rinsing them off in RO or DI water. We’ve also never had an issue with these pumps gassing. That’s such a reliable feature that, when we demo the pump we use champagne to show that it won’t gas.
Simplicity
The DDE pump’s turn-down ratio is wide enough to replace a number of different pumps. We tell customers the DDE 6-10 B-PVC/E/C-X-31l003BG covers about 90% to 95% of alk inhibitors and chlorine applications, although we offer a few other variations of this pump—each is available either as a “basic” model (manual control only) or “pulse” configuration (pulse, remote off/on, and solution level sensor), and with different wet end (head/gasket/check ball) materials. All Grundfos pumps come with a ¼” installation kit (tubing, foot valve and injector).
Grundfos provides an easy disconnect mounting plate that allows for multi-position installation and ease of service.
To learn more about the complete line of Grundfos chemical dosing pumps, I recommend visiting the page on our website dedicated to Grundfos SMART Digital Dosing.
The pump’s built-in sensor and variable-speed stepper motor solve installation and operation headaches, address safety and reliability concerns, and help stem energy and system costs. To learn about the industry-leading features of the Grundfos SMART Digital Dosing Pump, check out the video below.
https://youtu.be/OWXoYRWqkQo
As always, I also encourage you tocontact the dosing expertsin our pumps and water treatment departments. We can help you size, select and specify pumps, as well as answer any questions you may have. We are your distributor for Grundfos chemical pumps.
