Air-Operated Diaphragm Pumps (AODD) - Efficient and Reliable Pumping for Demanding Fluids
Air-operated diaphragm pumps (AODD) are pneumatically driven positive-displacement pumps that generate a continuous flow using two interacting diaphragms. These pumps are particularly suitable for handling abrasive, viscous, and solids-laden fluids, and their high self-priming capability and tolerance for dry running make them highly versatile.
Harton Anlagentechnik GmbH offers a wide selection of air-operated diaphragm pumps tailored to specific requirements in the chemical, food processing, wastewater treatment, and many other industrial sectors. With a variety of housing materials, diaphragm materials, and designs, we offer a customized solution for your pumping needs.
Harton Anlagentechnik GmbH offers a wide selection of air-operated diaphragm pumps tailored to specific requirements in the chemical, food processing, wastewater treatment, and many other industrial sectors. With a variety of housing materials, diaphragm materials, and designs, we offer a customized solution for your pumping needs.
Why Choose Compressed Air Diaphragm Pumps from Harton Anlagentechnik GmbH?
Air-operated diaphragm pumps are ideal for applications involving the transfer of fluids with a high solids content, such as slurries, suspensions, and abrasive liquids. The diaphragms and valve components are specifically designed to meet these requirements, ensuring a high level of wear resistance.
Our diaphragm pumps offer excellent self-priming capability and are capable of operating reliably even during dry-run periods without causing damage to internal components. This makes them ideal for use in varying process conditions.
Our compressed-air diaphragm pumps are used in many industries, including:
- Chemical industry: For pumping chemicals, acids, alkalis, and solvents
- Food industry: For pumping food products and liquids containing additives in hygienic designs
- Wastewater treatment: For pumping wastewater and sludge
- Environmental technology: For dosing and pumping solids in water treatment systems
- Manufacturing: For abrasive media in production
Typical technical parameters for compressed-air diaphragm pumps:
Volume flow rate Q:
0.5-1,000 L/min (depending on model and operating point)
Differential pressure Δp:
0.5-8 bar (typical), up to 16 bar (special version)
Media temperature:
-20 °C to +120 °C (depending on the material and diaphragm)
Ambient temperature:
-20 °C to +60 °C
Viscosity:
0.5-90,000 cst (depending on the model)
Solid content:
0-30% by weight (required for abrasive media)
Gas content in the medium:
0-50% by volume (Feasible, but performance may be reduced)
Self-priming head:
0-6 m (depending on the medium and installation)
Air consumption:
0.1-2.0 Nm³/min (depending on operating point and size)
Particle size (max.):
0-10 mm (depending on the valve)
Pulsation:
Low to moderate (typical for double-diaphragm pumps)
Air Quality:
To ensure proper operation of the diaphragm pump, the compressed air supply must be free of oil and water to prevent icing and valve sticking.
To ensure proper operation of the diaphragm pump, the compressed air supply must be free of oil and water to prevent icing and valve sticking.
Typical technical parameters for compressed-air diaphragm pumps:
Our compressed-air diaphragm pumps are suitable for handling a wide range of media, including:
Abrasive fluids:
For pumping slurries, abrasive liquids, and suspended media, our pumps offer high wear resistance and a long service life.
Oily media:
For hydraulic and lubricating oils, as well as industrial process fluids, our pumps provide reliable pumping with minimal wear.
Chemically aggressive media:
Our compressed-air diaphragm pumps are designed for pumping chemicals such as acids, alkalis, and solvents. We offer special materials for chemically aggressive applications.
Media containing solids:
The pumps are particularly well-suited for handling fluids with a high solids content, such as slurries and suspensions, as the diaphragm pump is robust against solids.
Gas-containing and foaming media:
Our compressed air diaphragm pumps can also handle gas-containing or foaming media; we utilize special degassing mechanisms to ensure consistent flow rate.
Process-specific requirements:
Abrasive fluids:
For pumping slurries, abrasive liquids, and suspended media, our pumps offer high wear resistance and a long service life.
Oily media:
For hydraulic and lubricating oils, as well as industrial process fluids, our pumps provide reliable pumping with minimal wear.
Chemically aggressive media:
Our compressed-air diaphragm pumps are designed for pumping chemicals such as acids, alkalis, and solvents. We offer special materials for chemically aggressive applications.
Media containing solids:
The pumps are particularly well-suited for handling fluids with a high solids content, such as slurries and suspensions, as the diaphragm pump is robust against solids.
Gas-containing and foaming media:
Our compressed air diaphragm pumps can also handle gas-containing or foaming media; we utilize special degassing mechanisms to ensure consistent flow rate.
Process-specific requirements:
- Our pump solutions can be flexibly adapted to your fluid requirements. We offer customized designs for all types of liquids and solids.
- When handling abrasive media, we use optimized valve and diaphragm strategies to minimize wear.
Choosing the right materials is crucial for the performance and service life of compressed-air diaphragm pumps.
Typical materials:
Wear protection:
Our pumps for abrasive media are equipped with special valve and seat components that extend service life and minimize maintenance costs.
Typical materials:
- Housing: Aluminum, stainless steel 1.4404, 1.4571, or plastic (PP, PVDF), depending on chemical requirements and temperature
- Diaphragms: EPDM, FKM, NBR, PTFE-laminated, or FFKM, depending on the medium and temperature
- Valves: Stainless steel, PTFE, ceramic, or elastomer-coated, depending on abrasiveness and medium
- Seals: FKM, EPDM, PTFE, FFKM
Wear protection:
Our pumps for abrasive media are equipped with special valve and seat components that extend service life and minimize maintenance costs.
The sealing strategy for compressed-air diaphragm pumps minimizes leaks and ensures efficient and safe metering.
Sealing options:
Safety features:
Sealing options:
- Seal adapted to the medium
- O-ring system for minimal leakage
Safety features:
- Overpressure protection: Prevents excessive pressure spikes in the system
- Dry-run protection: Prevents damage caused by dry running
- Gas bubble management: Reduces the impact of gas bubbles on production
Compressed-air diaphragm pumps are pneumatically driven and are characterized by their high flexibility and energy efficiency.
- Air pressure range: 2-8 bar (depending on model)
- Air consumption: 0 .1-2. 0 Nm³/min
- Control: Stroke control via pneumatic control or manually
- Energy consumption: Determined by air consumption and operating pressure
- ATEX: Zones 1 and 2 permitted when processing flammable gases or liquids
Quality, Testing, and Documentation
Our compressed-air diaphragm pumps undergo comprehensive testing and quality assurance:
Documentation:
- Factory Acceptance Test (FAT)
- Performance Test (Q/Δp)
- Leak test
- Material certificates in accordance with EN 10204 2.2 / 3.1
Documentation:
- Data sheet
- Operating Instructions
- Spare Parts List
- Certificates of Conformity (CE, ATEX)
Service, Maintenance, and Lifespan (TCO)
Maintenance of compressed-air diaphragm pumps includes regularly scheduled inspections of the diaphragms, valves, and seals.
TCO drivers:
Our pump solutions are designed to maximize maintenance intervals and minimize downtime.
TCO drivers:
- Energy consumption
- Maintenance costs
- Service life of diaphragms and seals
- Downtime
- Spare part costs
Our pump solutions are designed to maximize maintenance intervals and minimize downtime.
References and Technical Strengths
Compressed-air diaphragm pumps from Harton Anlagentechnik GmbH are successfully used in numerous applications:
- Chemical industry: For pumping solvents and corrosive chemicals
- Food industry: For the hygienic transfer of food products
- Wastewater treatment: For pumping sludge and wastewater
- Manufacturing: For abrasive and viscous media
Types and Variants of Compressed-Air Diaphragm Pumps
Compressed-air diaphragm pumps are available in numerous designs and can be specifically adapted to different fluids and applications. Depending on the requirements, variants are available for abrasive or chemically aggressive fluids, high flow rates, precise pressure control, and hygienic applications. This means that the right air-operated diaphragm pump can be selected for virtually any industrial application.
Pneumatic Diaphragm Pumps for Abrasive Fluids
This type of air-operated diaphragm pump is specifically designed for abrasive and solids-laden fluids. The pumps are equipped with reinforced diaphragms and housings to withstand wear caused by abrasive particles. They are used in the cement, mining, and wastewater industries.
| Pressure | up to 8 bar |
| Accuracy | ±1 - 3 % |
| Media | Abrasive liquids, Sludge, Wastewater |
| Viscosity | 50 - 500.000 mPa·s |
| Temperature | -10 bis +80 °C |
| Materials | Stainless steel, PTFE, FKM |
| ATEX | yes |
| Dosing capacity | 0,1 - 1.500 l/h |
Pneumatic Diaphragm Pumps for Chemically Corrosive Fluids
These compressed-air diaphragm pumps are designed for handling highly corrosive chemicals. They feature special seal and diaphragm materials that are suitable for pumping acids, alkalis, solvents, and other corrosive media. These pumps are used in the chemical industry and in wastewater treatment.
| ATEX | yes |
| Dosing capacity | 0,1 - 2.000 l/h |
| Pressure | up to 8 bar |
| Accuracy | ±1 - 3 % |
| Media | Acids, Lye, Solvent, harsh chemicals |
| Viscosity | 10 - 500.000 mPa·s |
| Temperature | -10 bis +120 °C |
| Materials | PTFE, PVDF, Stainless steel |
Pneumatic Diaphragm Pumps for High Flow Rates
These pumps are designed for applications requiring particularly high flow rates. They are capable of transporting large volumes of liquid over short heads. These models are used in drainage, agriculture, and the chemical industry.
| Pressure | up to 8 bar |
| Accuracy | ±2 - 5 % |
| Media | Water, Wastewater, chemical liquids |
| Viscosity | 1 - 500 mPa·s |
| Temperature | -10 to +80 °C |
| Materials | Stainless steel, PTFE, PVDF |
| ATEX | optional |
| Dosing capacity | 0,1 - 10.000 l/h |
Pneumatic diaphragm pumps with adjustable pressure
Compressed-air diaphragm pumps with adjustable pressure offer precise control of flow rate and pressure. These pumps are particularly well-suited for applications where operating conditions vary, such as in chemical processing or the plastics industry. Flexible adjustment of the speed and operating pressure enables even more precise metering.
| Dosing capacity | 0,1 - 1.000 l/h |
| Pressure | up to 16 bar |
| Accuracy | ±0,5 - 2 % |
| Media | Chemicals, viscous liquids |
| Viscosity | 50 - 100.000 mPa·s |
| Temperature | -20 to +120 °C |
| Materials | Stainless steel, Aluminum, PTFE |
| ATEX | yes |
Hygienic Compressed Air Diaphragm Pumps
Hygienic compressed-air diaphragm pumps are specifically designed for the food and pharmaceutical industries. They meet strict hygiene regulations and are easy to clean. These pumps have smooth surfaces and are suitable for sterile applications.
| Viscosity | 10 - 50.000 mPa·s |
| Temperature | -20 to +100 °C |
| Materials | Stainless steel, PTFE, FKM |
| ATEX | yes |
| Dosing capacity | 0,1 - 500 l/h |
| Pressure | up to 6 bar |
| Accuracy | ±0,5 - 1 % |
| Media | Food, pharmaceutical liquids |
Standard Pneumatic Diaphragm Pumps
Compressed-air diaphragm pumps operate using compressed air, which causes the diaphragm system to oscillate. These pumps are particularly robust and versatile because they operate without an electrical power source and are therefore suitable for use in potentially explosive atmospheres. They are frequently used in the chemical, pharmaceutical, and wastewater treatment industries.
| Dosing capacity | 0,1 - 2.000 l/h |
| Pressure | up to 8 bar |
| Accuracy | ±1 - 3 % |
| Media | Chemicals, aggressive media, viscous liquids |
| Viscosity | 50 - 500.000 mPa·s |
| Temperature | -10 to +80 °C |
| Materials | Stainless steel, PTFE, PVDF |
| ATEX | yes |
Relevance for Engineers and Technical Buyers
For an optimal technical and economic design, the following factors are particularly crucial: flow rate, differential pressure, fluid properties (viscosity, solids content, chemical resistance), suction head, compressed air supply, and the selection of suitable diaphragm and housing materials.
When purchasing, in addition to performance specifications, particular attention should be paid to materials, connection sizes, maximum permissible particle size, air consumption, ATEX compliance, ease of maintenance, and the availability of replacement and wear parts.
Depending on the application, requirements such as the ATEX Directive, the Pressure Equipment Directive (PED), food-grade materials in accordance with FDA or EU Regulation 1935/2004, as well as material- and application-specific leak and functional tests must be taken into account.
FAQs by Industry
Select an industry
Pneumatic Diaphragm Pumps in the Chemical Industry: Process Reliability in the Transport of Chemical Raw Materials
Pneumatic Diaphragm Pumps in the Ceramics Industry: Use in the Conveyance of Ceramic Slurry
Pneumatic Diaphragm Pumps in Surface Treatment: Handling Solvent-Based Paints and Varnishes
Pneumatic Diaphragm Pumps in the Food Industry: Use in Food and Beverage Filling
Pneumatic Diaphragm Pumps in Water and Wastewater Technology: Industrial Wastewater Filtration
Pneumatic Diaphragm Pumps in the Mining Industry: Conveying Abrasive Fluids
Submit a request now!
For personalized advice and customized solutions that meet your needs.
Inquiry Form - Compressed Air Diaphragm Pumps
Request:
Air-operated diaphragm pumps
We will be happy to contact you.
Inquiry form