Grundfos Diaphragm Dosing Pumps

Grundfos diaphragm dosing pumps are precision devices designed to accurately inject chemicals or other fluids into a system. They are recognized for their accuracy, reliability, and cost-effectiveness, making them suitable for a variety of applications such as water treatment, chemical metering, and industrial processes.

Grundfos offers dosing pumps in both digital and mechanical designs. The digital dosing pumps are smart solutions tailored for complex dosing in less aggressive environments. They provide a high level of accuracy, which not only reduces chemical waste but also lowers energy costs. In contrast, Grundfos mechanical dosing pumps are known for their extreme durability, making them ideal for applications that require reliable dosing, high-pressure capabilities and minimal maintenance.

Features & Benefits

Know more about the features & benefits of using Grundfos' Diaphragm.

Precise and easy setting
Unique dosing technology
Compact design saves money and space
Accessories enhance the operation of the entire system
Smooth and low-pulsation dosing
Carefully selected materials for reliability and longevity

Available Options

We customise pumps according to your specific application. Get in touch with us to know your options.

Materials options
Control options
Connection options
Accessories and spare parts
Baseplate/mounting

Key Specifications

Here are the key specifications of Grundfos' Diaphragm.

Digital Dosing Pumps

Max flow: 940 l/h
Max head: 16 bar
Max pressure: 16 bar
Liquid temperature: -10 - 50 °C

Mechanical Dosing Pumps

Max flow: 2300 l/h
Max head: 200 bar
Max pressure: 200 bar
Liquid temperature: -10 - 90 °C

Applications

Here is a list of industrial applications for which Grundfos' Diaphragm are commonly utilized.

Drinking water treatment
Wastewater treatment
Cooling water treatment
Washing systems
Process water treatment
Chemical industry
Caustic Dosing
Sulphuric acid dosing
pH correction
Chemical dosing
Desalination
Industrial wastewater and water supply
Industrial Heating

Different options for a Peristaltic hose pumps tubing

DMH

DMX

DDA

DDE

DME

DDC

OUR RANGE OF AVAILABLE Grundfos DIGITAL DOSING PUMPS

Grundfos digital dosing pumps are variable-speed pumps designed for precise and controlled chemical dosing in industrial and water treatment applications. They are known for their high accuracy, low pulsation, and exceptional efficiency and reliability.

Benefits

Variable-speed stepper motor for precise control and accurate dosing.
Microprocessor control and intelligent drive that ensure low pulsation and precise dosing.
Maintenance-free FlowControl system that detects malfunctions due to air bubbles.
EC motor technology for reduced energy consumption.
High accuracy for various types of media.
User-friendly interface with easy calibration and intuitive menus.
Modular design for custom solutions and straightforward integration.
Built for long-term performance and durability.

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DDC

Max flow: 15 l/h
Max head: 10 bar
Max pressure: 100 bar

DDE

Max flow: 200 l/h
Max head: 10 bar
Max pressure: 10 bar

DDA

Max flow: 200 l/h
Max head: 16 bar
Max pressure: 16 bar

DME

Max flow: 940 l/h
Max head: 10 bar
Max pressure: 10 bar

OUR RANGE OF AVAILABLE Grundfos Mechanical DOSING PUMPS

Grundfos mechanical dosing pumps are a positive displacement pump with an external motor drive, designed for precise and controlled dosing of liquids into a larger process stream. These pumps are recognised for delivering smooth, low-pulsation dosing, durability, and minimal maintenance requirements.   

Benefits

Provides smooth, low-pulsation dosing, which is crucial for maintaining process stability and accuracy.
Robust design with high-quality motors to ensure durability and reliability.
Requires minimal maintenance, which reduces downtime and maintenance costs.
Many models include a diaphragm protection system to prevent leaks and damage.
Some models, particularly from the DMX range, offer a variety of dosing head sizes, materials, and accessories for flexibility in application.
Designed for compatibility with existing systems, making them easy to integrate and operate.

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DMH

Max flow: 2300 l/h
Max head: 200 bar
Max pressure: 200 bar

DMX

Max flow: 1120 l/h
Max head: 12 bar
Max pressure: 12 bar

PRINCIPLE OF OPERATION

Grundfos dosing pumps can be controlled either mechanically or digitally, providing a range of options for various applications. Both types use a flexible diaphragm driven by a motor to precisely dose fluids.

In the mechanical models, the pump head is connected to a motor, often through a worm gearbox that converts the motor's rotational motion into cam movement. This cam movement drives a piston that compresses the diaphragm within the pump head. When the piston pushes down, the diaphragm flexes and expels fluid through an outlet valve. The dosing capacity of the pump is controlled by adjusting both the stroke length and the stroke rate.

On the other hand, Grundfos digital dosing pumps utilise variable-speed stepper motors for more precise and continuous dosing. These pumps feature internal stroke speed control, allowing for smooth and continuous dosing without the need to adjust the stroke length. This design enhances accuracy and ensures consistent dosing, even when dealing with fluids of varying viscosity or degassing media.

Grundfos offers a variety of control options, including Flow Control Measurement (FCM), Flow Control (FC), Analogue Relay (AR), and more, allowing for flexible control tailored to different needs.