Dosing systems that make process chemistry controllable
In many industrial processes, it is not the flow rate of a pump that determines process stability, but rather the precise addition of additives, chemicals, or inhibitors. This is exactly what dosing systems are used for. They combine metering pumps, measurement and control technology, media management, and safety functions into an integrated system.
Harton Anlagentechnik GmbH therefore develops dosing systems not merely as pump stations, but as process-integrated dosing systems in which dosing accuracy, control behavior, and system safety are considered together.
Harton Anlagentechnik GmbH therefore develops dosing systems not merely as pump stations, but as process-integrated dosing systems in which dosing accuracy, control behavior, and system safety are considered together.
Why choose dosing systems from HARTON Anlagentechnik GmbH?
Our dosing systems are custom-designed to meet your specific process requirements and combine precise dosing technology, intelligent control, and high-quality components into a reliable, comprehensive solution.
Durable materials, energy-efficient components, and a design tailored to the application ensure cost-effective operation and a long service life, even under demanding process conditions.
A maintenance-friendly design and easy access ensure short service times and minimize downtime.
Technical Capabilities of Dosing Systems
The specific parameters are defined on a project-by-project basis.
Typical planning areas:
Typical planning areas:
| Dosing capacity per pump head | 0.001-1,027 l/h |
| Dosing Pressure | 1-25 bar (higher pressures possible with piston pumps) |
| Media temperature | -20 °C to +200 °C |
| Ambient temperature | -20 °C to +60 °C |
| Viscosity | 0.5-100,000 mPa·s |
| Dosing Accuracy | ±0,5 - ±3 % |
| Stroke frequency | 10-300 strokes/min |
| Gas Content in the Dosing Medium | 0-5% by volume |
| Solid content | 0-0.05% by weight |
| Control system | Local or fully integrated into DCS/PLC |
The values listed above are design ranges for smaller dosing systems. For higher flow rates or higher pressure ranges, project-specific solutions can be designed.
For which applications are dosing systems used?
Dosing systems are used wherever process materials need to be added in a controlled and reproducible manner.
Typical applications:
Dosing can be performed as:
Typical applications:
- pH adjustment in water and wastewater treatment plants
- Flocculants and coagulants in water treatment processes
- Addition of corrosion inhibitors in power plants
- Biocide dosing in cooling circuits
- Additive dosing in chemical production processes
- Injection systems for process chemicals
Dosing can be performed as:
- continuous dosing
- batch dosing
- proportional to flow rate
- controlled by a feedback loop (pH / ORP / conductivity)
The choice of material is determined by the medium, pressure, and temperature.
Typical materials for pump heads and piping:
Diaphragms are often designed as:
Valve seats and seals can be made of:
Material certificates are provided on a project-specific basis in accordance with EN 10204 (2.2 or 3.1).
Typical materials for pump heads and piping:
- AISI 316 stainless steel
- PVDF
- PP
- PTFE
Diaphragms are often designed as:
- multilayer PTFE membranes
- chemically compatible specialty membranes
- Piston and plunger components are coated with a wear-resistant coating or hardened.
Valve seats and seals can be made of:
- PVC
- PVDF
- EPDM
- FKM
- NBR
- PTFE
Material certificates are provided on a project-specific basis in accordance with EN 10204 (2.2 or 3.1).
Dosing systems can be operated at various levels of automation.
Local Control
- HMI Panel
- Local PLC
- Simple dosing control
Integration with Control Systems
Many systems are integrated directly into process control systems.
Typical interfaces:
Control loops can be controlled via:
Typical interfaces:
- 4-20 mA
- Pulse signals
- Fieldbus systems
Control loops can be controlled via:
- pH measurement
- Redox measurement
- Conductivity
- Flow
- Dosing is controlled via:
- Stroke adjustment
- Speed control
- PID control
Design Types and System Variants of Dosing Systems
Dosing systems are designed on a project-by-project basis. The key factors are the medium, the pressure level, and the required dosing accuracy.
Diaphragm Metering Pump Systems
Diaphragm metering pumps completely isolate the metering fluid from the drive. This makes them particularly suitable for:
Typical advantages:
- corrosive chemicals
- toxic media
- Applications with high safety requirements
Typical advantages:
- High sealing performance
- Low risk of leakage
- Stable dosing performance
Piston Metering Pump Systems
Piston metering pumps use direct piston delivery and achieve significantly higher pressures.
They are used for:
The design difference lies in the sealing system, which may require more maintenance than that of diaphragm pumps.
They are used for:
- High-pressure metering
- Injection processes
- More viscous fluids
The design difference lies in the sealing system, which may require more maintenance than that of diaphragm pumps.
Multi-component Dosing Systems
Many industrial applications require the dosing of multiple media.
Typical systems:
Typical systems:
- Multi-line dosing skids
- Batch dosing systems
- Injection systems for multiple chemicals
- Depending on the project, the number of dosing lines can range from 1 to about 20 media.
Media and Process Materials
Dosing systems are often required to handle media that are chemically demanding or critical to the process.
Chemically aggressive media
Acids, alkalis, or oxidizing agents are used only if:
have been chemically verified.
Typical pH range:
- Pump Head Materials
- Diaphragm material
- Valve materials
have been chemically verified.
Typical pH range:
- pH 0-14 (depending on the material)
Solvents and media containing VOCs
For solvents, the following must also be evaluated:
- Sealing systems
- Elastomer compatibility
- Explosion protection
High-viscosity dispensing fluids
High viscosities affect:
In such cases, temperature control or adjustment of the stroke frequency may be necessary.
- Valve opening times
- Displacement volume
- Pump stability
In such cases, temperature control or adjustment of the stroke frequency may be necessary.
Media containing gas or solids
Gas bubbles or solids can affect dosing accuracy.
Threshold values are therefore defined for:
Threshold values are therefore defined for:
- Gas content
- Particle size
- Solid concentration
Safety and Sealing Concepts
Since metering systems operate on the positive displacement principle, overpressure protection is a mandatory component.
Typical safety components:
Diaphragm metering pumps achieve virtually leak-free delivery in the pump head.
For critical fluids, the following can be used:
Interfaces to the overall system include:
Typical safety components:
- Safety valves
- Relief valves
- Check valves
- Injection valves
Diaphragm metering pumps achieve virtually leak-free delivery in the pump head.
For critical fluids, the following can be used:
- Double diaphragms
- Leakage monitoring
- Safety shut-offs
Interfaces to the overall system include:
- mechanical connections
- Electrical power supply
- Control and bus signals
Integration and Plant Peripherals
Dosing systems are often supplied as complete process skids.
Typical components:
Media tanks are designed according to:
Additional peripherals may include:
The exact design is always adapted to the installation site and system layout.
Typical components:
- Base frame or skid
- Drip pan
- Dosing pumps
- Media container
- Fittings
- Piping
Media tanks are designed according to:
- Volume
- Material
- Degassing
- Level monitoring
Additional peripherals may include:
- Pulsation dampers
- Safety valves
- Check valves
- Injection lances
- Installation Kits
The exact design is always adapted to the installation site and system layout.
Monitoring and Operational Safety
Various monitoring systems can be integrated to ensure stable operation.
Typical monitoring functions:
Alarm and shutdown logic is defined on a project-by-project basis and adapted to the operator’s standards.
Typical monitoring functions:
- Pressure monitoring
- Flow measurement
- Level monitoring
- Diaphragm rupture monitoring
- Stroke Counting
Alarm and shutdown logic is defined on a project-by-project basis and adapted to the operator’s standards.
Quality, Testing, and Documentation
Dosing systems are tested before shipment.
Typical tests:
Documentation may include:
Documentation is typically provided in German and English.
Typical tests:
- Functional test
- Dosing accuracy test
- Leak test
- Control loop test (e.g., pH control)
Documentation may include:
- Data sheets
- R&I flow diagrams
- Skid layouts
- Electrical schematics
- I/O Lists
- Operating Instructions
- Certificates of Conformity
Documentation is typically provided in German and English.
Industries and Typical Applications
Dosing systems are used in many industrial sectors.
Typical industries:
Typical Applications:
Typical industries:
- Water and wastewater treatment
- Chemical industry
- Power plants
- Oil and gas industry
- Food Industry
- OEM Machinery Manufacturing
Typical Applications:
- pH neutralization
- Flocculant dosing
- Inhibitor dosing
- Biocide dosing
- Process Additives
- Injection systems
Types and Variants of Our Dosing Systems
Technical System Overview for Industrial Applications
Dosing systems are process-integrated systems designed for the precise, reproducible, and controllable addition of liquids to industrial processes. Unlike standalone dosing pumps, they comprise a coordinated complete system consisting of pump technology, tanks, valves, sensors, and controls.
They are used in the chemical, water and wastewater treatment, energy, and process engineering industries, as well as in mechanical and plant engineering, whenever dosing accuracy, process stability, and documentable operational management are required. For engineers and technical buyers, it is crucial to understand that system performance depends not only on the pump but on the interaction of all components.
Harton Anlagentechnik GmbH therefore develops dosing systems based on the actual process rather than on individual components.
They are used in the chemical, water and wastewater treatment, energy, and process engineering industries, as well as in mechanical and plant engineering, whenever dosing accuracy, process stability, and documentable operational management are required. For engineers and technical buyers, it is crucial to understand that system performance depends not only on the pump but on the interaction of all components.
Harton Anlagentechnik GmbH therefore develops dosing systems based on the actual process rather than on individual components.
High-pressure metering systems are used when fluids need to be fed into processes with high back pressure. The design takes into account pressure stability and the sealing system.
| Pressure | up to 400 bar |
| Dosing capacity | 0,1 - 1.000 l/h |
| Accuracy | ±0,5 - 2 % |
| Media | liquid |
| Temperature | -20 to +200 °C |
| Seal | Hochdruck-Gleitring |
| Materials | high-alloy steels |
| Controls | SPS |
| ATEX | optional |
These dosing systems are designed for sterile or hygienically critical processes. They comply with FDA and EHEDG requirements.
| Accuracy | ±0,5 - 1 % |
| Pressure | up to 16 bar |
| Media | Food, Pharmaceuticals |
| Temperature | 0 to 150 °C |
| Cleaning | CIP/SIP |
| Materials | Stainless Steel 1.4404 |
| Surface | ＜ 0,8 µm |
| ATEX | optional |
| Dosing capacity | 0,1 - 2.000 l/h |
Continuous dosing systems operate with a constant flow rate and are integrated directly into process lines. Dosing occurs in sync with the main flow, enabling constant concentration control. In the context of projects undertaken by Harton Anlagentechnik GmbH, this design is the preferred choice when process stability and uniform feed are required.
| Materials | Stainless steel, plastic |
| ATEX | optional |
| Dosing capacity | 0,1 - 10.000 l/h |
| Print range | bis 40 bar |
| Accuracy | ±0,5 - 2 % |
| Media | liquid, low-high viscosity |
| Viscosity | 1 - 100.000 mPa·s |
| Temperature | -20 to +150 °C |
| Regulation | kontinuierlich |
| Controls | SPS / Durchflussregelung |
| Schnittstellen | 4-20 mA, Profibus |
These systems dispense multiple media simultaneously in defined ratios. Typical applications include the chemical industry, plastics processing, and adhesive systems. Our engineers pay particular attention to synchronization and mixing ratios.
| Komponenten | 2 - 6 |
| Dosing capacity | 0,1 - 5.000 l/h |
| Accuracy | ±0,5 - 2 % |
| Pressure | up to 50 bar |
| Media | liquid, viscous |
| Controls | SPS |
| Automatisierung | hoch |
| Materials | Stainless steel |
| ATEX | optional |
| Mischverhältnis | variabel |
These systems are pre-assembled and versatile. They are often used for temporary processes or pilot plants.
| Controls | integriert |
| Mobility | hoch |
| Materials | variable |
| ATEX | optional |
| Dosing capacity | 0,1 - 3.000 l/h |
| Pressure | up to 25 bar |
| Media | variable |
Volumetric dosing systems operate on the basis of defined volumetric flow rates and are less complex than gravimetric systems. Their design depends on the material being handled, particularly with regard to viscosity and flow characteristics.
| ATEX | optional |
| Dosing capacity | 0,1 - 10.000 l/h |
| Accuracy | ±1 - 5 % |
| Pressure | up to 40 bar |
| Media | liquid |
| Viscosity | 1 - 200.000 mPa·s |
| Temperature | -20 to +150 °C |
| Controls | Durchflussmessung |
| Materials | Stainless steel, plastic |
| Automatisierung | mittel |
Relevance for Engineers and Technical Buyers
The design of a dosing system is based on dosing capacity, operating pressure, medium properties, viscosity, control strategy, and the requirements for dosing accuracy, automation, and material compatibility.
For technical procurement, the following factors are particularly crucial: dosing range, maximum operating pressure, materials, control and interface design, dosing accuracy, scope of documentation, and maintenance and spare parts strategy.
Depending on the application, dosing systems are designed and documented on a project-by-project basis in accordance with relevant standards and guidelines, such as EN 10204 for material certificates, ATEX for potentially explosive atmospheres, and application-specific hygiene or pressure equipment regulations.
FAQs by Industry
Select an industry
Automotive Manufacturing - Adhesive and Sealant Application
Chemical Industry - Processing and Filling
Food Technology - Hygiene and Filling Processes
Pharmaceuticals - High-Precision Dosing
Electronics Manufacturing - High-Speed Microdosing
General Mechanical Engineering - Assembly and Surface Treatment
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