Verderair VA
Verderair VA Pumpen sind der Maßstab für Druckluftmembranpumpen. Die Baureihe ist mit einem schnell umschaltenden und blockierfreiem Luftsteuerventil ausgestattet,...
| Max. Fördermenge | 1200 l/min |
| Max. Förderdruck | 8,6 bar |
Membranpumpe
AODD- und EODD-Membranpumpen, entwickelt und hergestellt
im eigenen Haus von Verderair
Für chemische, hygienische und anspruchsvolle industrielle Flüssigkeitshandhabung in mehr als 20 globalen Märkten.
Membranpumpe
Eine Diaphagmpumpe, auch Membranpumpe genannt, ist eine Verdrängerpumpe, die es Anwendern in der Industrie ermöglicht, sich auf einen Pumpentyp zu standardisieren, der für eine Vielzahl von Flüssigkeiten geeignet ist. Die Membranpumpen von Verderair, die im eigenen Haus und nach den höchsten Standards der Branche hergestellt werden, sind in verschiedenen Materialien erhältlich, sowohl metallisch als auch nichtmetallisch, um allen spezifischen Anforderungen im Bereich der Flüssigkeitshandhabung gerecht zu werden, egal wie schwierig sie sind.
Built for the fluids other pumps cannot handle
The Verderair range of industrial and hygienic diaphragm pumps is designed and manufactured in-house by Verderair for the applications where other pump types reach their limits. Concentrated acids, abrasive slurries, shear-sensitive foodstuffs, volatile solvents, and sterile pharmaceutical media all demand a pump with no shaft seal to leak, no rotating parts to degrade the fluid, and the flexibility to handle whatever your process throws at it. Available in metallic and non-metallic construction across a full range of material configurations, ATEX certified for Zone 1 and Zone 2 hazardous areas, and with hygienic models meeting FDA and EC 1935/2004 food contact material requirements, the Verderair range covers the duty points, fluid chemistries, and installation environments that define the most demanding industrial and hygienic fluid handling applications.
Want to understand how the pumping cycle works, what the air valve does, and how AODD and EODD technology differs in detail?
Speak to a pump expert
Our engineers are available to discuss your fluid type, flow rate, and process conditions and recommend the right Verderair configuration.
One Minute with your Pump Expert - Diaphragm Pumps
AODD vs. EODD: which type do you need?
Verderair manufactures both air operated double diaphragm (AODD) and electrically operated double diaphragm (EODD) pumps. Both types share the same seal-less, self-priming, dry-run safe design. The difference is the drive mechanism, which has significant implications for energy efficiency, installation, and flow control.
| Factor | AODD (air operated) | EODD (electrically operated) |
|---|---|---|
| Power source | Compressed air | Electrically operated |
| Energy efficiency | 10–15% of input electrical energy reaches the pump | Up to 80% more efficient than equivalent AODD |
| Flow control | Adjustable via inlet air pressure | Precise control via VFD or integrated controller |
| ATEX / hazardous area | Inherently safe: no electrical parts in fluid zone | Available in ATEX version |
| Noise level | Higher: characteristic exhaust beat at each stroke | Significantly quieter: no air exhaust |
| Portability | Lighter and portable: no motor, no electrical connection required | Requires fixed electrical supply |
| Installation | Can operate submerged; flexible installation options | Fixed installation; requires power connection |
| Best for | Hazardous zones, portable duty, variable flow, aggressive chemicals | Continuous high-volume transfer, energy savings, precise dosing |
Unsere vorgestellten Verderair-Membranpumpen
Verderair PURE
Die Konstruktion der Druckluftmembranpumpe Verderair PURE ist für den intensiven Einsatz, anspruchsvolle Chemikalien und schwierige Prozessbedingungen ausgelegt, wie...
| Max. Fördermenge | 660 l/min |
| Max. Förderdruck | 7 bar |
Verderair HC-PURE
Die hygienischen Doppelmembranpumpen der Verderair HC-PURE-Serie sind für verschiedene Hygieneanwendungen konzipiert. Die elektropolierten Oberflächen verringern das...
| Max. Fördermenge | 465 l/min |
| Max. Förderdruck | 7 bar |
Diaphragm and body materials
Diaphragm materials
The diaphragm is the component in direct contact with your process fluid. Selecting the correct material is critical for chemical compatibility, service life, and process safety.
| Category | Material | Price level | Flex life | Abrasion resistance | Chemical resistance | Min temp (°C) | Max temp (°C) |
|---|---|---|---|---|---|---|---|
| Thermoplastic (TPE) | Hytrel | €€ | B | A | B | -20 | 120 |
| Santoprene | €€ | A | A | B | -40 | 100 | |
| Verderlast® | €€ | A | A | B | -20 | 100–120 | |
| PTFE | PTFE (2-piece) | €€€ | B | C | A | 0 | 120 |
| PTFE (Overmolded) | €€€€ | A | C | A | -10 | 120 | |
| Rubber | EPDM | € | B | B | B | -40 | 100 |
| EPDM (Overmolded) | €€€ | A | B | B | -10 | 100 | |
| Nitrile (Buna-N) | € | B | B | C | -10 | 80–90 | |
| Viton (FKM) | €€€ | C | D | A | -20 | 120 |
A = Excellent B = Good C = Fair D = Not recommended
Body materials
The pump body material determines structural integrity, temperature tolerance, and resistance to the external process environment. Select based on your fluid chemistry and operating conditions.
| Category | Material | Price level | Mechanical strength | Abrasion resistance | Chemical resistance | Min temp (°C) | Max temp (°C) | Key limitations |
|---|---|---|---|---|---|---|---|---|
| Metallic | Aluminium | € | B | B-C | C | -20 | 100 | Corrosion risk with acids and alkalis; not for aggressive chemicals |
| Stainless steel (316) | €€ | A | B | A | -40 | 150 | Cost; chloride pitting possible | |
| Non-metallic | Acetal (POM) | €€ | B | B | A | -20 | 80–100 | Poor with acids and alkalis |
| Polypropylene (PP) | € | B-C | B | A-B | 0 | 80–90 | Limited temperature range; lower mechanical strength | |
| PVDF (Kynar) | €€ | B | B | A | -20 | 100–120 | More expensive than PP | |
| PTFE (Solid) | €€€ | C | C | A | 0 | 100 | Weak mechanically; usually lined, not structural | |
| UHMW-PE | €€ | B | A | A | -40 | 80 | Low temperature limit |
A = Excellent B = Good C = Fair D = Not recommended
Diaphragm pump applications
Chemical processing
The seal-less design of an air operated diaphragm pump eliminates shaft seal leakage risk when handling corrosive acids, alkalis, or solvents.
- Aggressive acid and solvent transfer
- Tanker and IBC unloading
- Filter press feed
- Polymer and additive dosing
- Electroplating bath transfer
Recommended pump: Verderair PURE
Diaphragm pumps in chemical processing →
Food and beverage
FDA-compliant materials and CIP/SIP compatibility make Verderair membrane pumps suitable for hygienic production environments.
- High-viscosity sauces and pastes
- Winery and brewery transfer
- Hygienic dosing and metering
- CIP return line pumping
Recommended pump: Verderair HC-PURE
Diaphragm pumps in food and beverage →
Hygienic applications
Verderair hygienic diaphragm pumps meet FDA and EC 1935/2004 food contact material requirements. The smooth, crevice-free internal design enables full CIP and SIP cleaning, making them the standard choice for hygiene-critical processes.
- Dairy, beverage, and brewing production
- Personal care and cosmetics manufacturing
- Hygienic chemical dosing
- Sterile and aseptic process transfer
Recommended pump: Verderair HC-PURE
Pharmaceutical
Zero contamination risk and full traceability of wetted materials for pharmaceutical production environments.
- Media preparation and buffer transfer
- Active ingredient dosing
- Tablet coating solution transfer
- Cosmetic cream and gel handling
Battery production
Lithium battery manufacturing relies on Verderair diaphragm pumps across multiple process steps requiring chemical resistance.
- Acid leaching and crystallisation
- Filter press feed for lithium slurries
- Flocculant dosing
Mining and minerals
No close-fitting internal parts to wear against abrasive material. Hytrel diaphragms extend service life in abrasive slurry duties.
- Slurry transfer and tailings handling
- Mine dewatering and sump pumping
- Reagent dosing in mineral processing
Water treatment
Self-priming, dry-run safe design for variable-flow and intermittent-duty water treatment applications.
- Coagulant and flocculant dosing
- Sludge and thickener transfer
- pH adjustment chemical dosing
Diaphragm pump applications
Chemical Processing
The seal-less design of an air operated diaphragm pump eliminates shaft seal leakage risk when handling corrosive acids, alkalis, or solvents.
• Aggressive acid and solvent transfer
• Tanker and IBC unloading
• Filter press feed
• Polymer and additive dosing
• Electroplating bath transfer
Recommended pump: Verderair PURE
Food and Beverage
FDA-compliant materials and CIP/SIP compatibility make Verderair membrane pumps suitable for hygienic production environments.
• High-viscosity sauces and pastes
• Winery and brewery transfer
• Hygienic dosing and metering
• CIP return line pumping
Recommended pump: Verderair HC-PURE
Why choose Verderair for your diaphragm pump?
Manufactured in-house
Every Verderair diaphragm pump, whether for industrial or hygienic applications, is designed and built in our own facilities. Full control over quality, faster delivery, and a shorter supply chain for spare parts and service in all 20+ markets we operate in.
ATEX certified for hazardous areas
The full Verderair AODD range is available as a complete ATEX diaphragm pump package in Zone 1 and Zone 2 certified configurations. Both metallic and non-metallic body options are available in conductive materials to prevent static accumulation in solvent and flammable fluid applications.
Anti-stall air valve design
The Verderair air valve prevents stalling even under moist compressed air or low air pressure. Anti-icing features ensure operation in cold or humid environments where condensation in the air supply would stall competing designs.
Broad material compatibility
Metallic options in aluminium, cast iron, and stainless steel 316L alongside non-metallic options in PP, PVDF, and conductive PP cover chemical and hygienic duties across virtually any process fluid.
Global support in 20+ markets
Local Verderair pump engineers are available for specification, installation support, and servicing. Genuine Verderair spare parts are stocked in each market for fast turnaround.
Proven service life
Verderair pumps are designed for extended diaphragm service life in continuous and intermittent duty. Our maintenance whitepaper covers the most common failure causes and how to prevent each one.
How to choose the right diaphragm pump
Use these three questions to identify the right Verderair configuration for your application.
Free whitepaper: 10 Ways to Kill your Diaphragm Pump
Curious about what you should be doing to preserve the life of your diaphragm pump? The following whitepaper has valuable insights into what can damage and even "kill" your diaphragm pump.
Frequently asked questions
Diaphragm Pumps
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How do EODD pumps compare to AODD on energy consumption?
A compressed air system converts only 10–15% of its input electrical energy into useful work at the pump. An EODD pump eliminates the compressor entirely and can deliver up to 80% lower energy consumption than an equivalent AODD pump on the same duty. For continuous high-run-time transfer applications, the EODD typically delivers payback within 12 to 24 months.
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What is the difference between the Verderair PURE and the Verderair VA?
The VA is a general-purpose AODD pump available in both metallic and non-metallic construction with a broad material choice. The PURE is engineered for the most aggressive chemical duties, with PTFE wetted parts throughout and a non-metallic body. For concentrated acids, strong oxidisers, or solvents requiring maximum chemical resistance, the PURE is the correct choice.
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Can a Verderair diaphragm pump handle solids?
Yes. Standard Verderair VA models pass solids up to 9.4 mm. HC-PURE sanitary models accommodate solids up to 25 mm. Hytrel diaphragms are recommended for abrasive solids duties to maximise service life.
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What diaphragm materials are available?
The Verderair range covers PTFE, EPDM, NBR (Buna-N), Hytrel, Santoprene, and Neoprene. PTFE is the standard recommendation for aggressive chemical and high-purity applications. Hytrel is preferred for abrasive slurries. EPDM and Santoprene cover food, beverage, and general industrial use.
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Are Verderair diaphragm pumps ATEX certified?
Yes. The full Verderair AODD range is available as an ATEX diaphragm pump in Zone 1 and Zone 2 certified versions. Both metallic and non-metallic body options are available in conductive materials to prevent static build-up in solvent and flammable fluid applications.
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What is the maximum flow rate of a Verderair diaphragm pump?
The Verderair VA delivers up to 1,200 l/min at a maximum discharge pressure of 8.6 bar. Across the full range, models are available from below 10 l/min up to 1,200 l/min to match a wide variety of industrial duty points.
Find the right diaphragm pump for your application
Our pump engineers are available across all major markets to support specification, selection, and installation. Whether you are replacing an existing pump, designing a hygienic process line, or evaluating diaphragm pump technologies for the first time, we can help.
Wie funktioniert eine Membranpumpe?
Eine Membranpumpe arbeitet mit einer flexiblen Membran, die sich hin und her bewegt, um ein variables Volumen innerhalb der Pumpenkammer zu erzeugen. Wenn sich die Membran nach oben bewegt, erzeugt sie ein Vakuum, das Flüssigkeit in die Kammer zieht. Wenn sich die Membran nach unten bewegt, drückt sie die Flüssigkeit aus dem Auslassventil. Dieser Pumpentyp wird häufig wegen seiner Zuverlässigkeit und seiner Fähigkeit verwendet, verschiedene Flüssigkeiten ohne Verunreinigung zu fördern, da die Flüssigkeit nicht mit beweglichen Teilen wie Zahnrädern oder Kolben in Berührung kommt.
Arten von Membranpumpen
Unser Verderair-Sortiment besteht aus zwei verschiedenen Arten von Membranpumpen, druckluftbetriebenen Doppelmembranpumpen und elektrischen Membranpumpen. Wie der Name schon sagt, besteht der Hauptunterschied zwischen den beiden in der Art und Weise, wie sie funktionieren, wobei erstere mit Druckluft angetrieben wird, während letztere mit einem Elektromotor betrieben wird.
Haben Sie eine Frage zur Funktionsweise einer Membranpumpe?
Brauchen Sie Hilfe? Unsere Pumpenexperten sind hier, um Ihre Fragen zu beantworten!
Anwendungen von Membranpumpen
Unsere Membranpumpen zeichnen sich durch eine hohe Vielseitigkeit und Zuverlässigkeit bei der Förderung einer Vielzahl von Flüssigkeiten und unter unterschiedlichen Bedingungen aus. Zu den Anwendungen gehören
- Chemische Anwendungen: Zu den Anwendungen einer Membranpumpe in der chemischen Industrie gehören die Oberflächenbehandlung von Metallen, das Entladen von Tankwagen, das Dosieren von Additiven und Polymeren sowie das Pumpen von Additiven mit Schwefelsäure. Der Verderair PURE ist unsere ideale Wahl für diese Anwendungen.
- Lebensmittel und Getränke: Eine Membranpumpe eignet sich auch für Anwendungen in der Lebensmittel- und Getränkeindustrie. Von der Aufbereitung über den Transport bis hin zur Filtration, Pasteurisierung und sogar CIP. Eine Membranpumpe von Verderair ist mit ihren verschiedenen Kombinationsmöglichkeiten von Materialien und Zertifizierungen die perfekte Wahl für die Lebensmittel- und Getränkeindustrie.
- Batterieproduktion: Die Herstellung von Lithiumbatterien kann ein langwieriger Prozess sein, und glücklicherweise sind Verderair-Membranpumpen für verschiedene Schritte bei der Herstellung dieser Produkte unerlässlich. Eine Membranpumpe ist in Schritten innerhalb des Prozesses wie der Flockungsmitteldosierung, der Filterpresse sowie dem Entladen unerlässlich. Die Verderair e-PUREzeichnet sich besonders durch eine Membranpumpe aus und ist aufgrund ihrer chemischen Verträglichkeit die beliebteste Pumpe für die Säurelaugung und -kristallisation sowie für deren Dosierung und Förderung.
- Pharmazeutische Anwendungen: In der pharmazeutischen Industrie spielen Membranpumpen in verschiedenen Bereichen eine wichtige Rolle. Zu den beliebtesten Anwendungen gehören Seife und Reinigungsmittel, das Umfüllen von Chemikalien, die Medienvorbereitung, die präzise Dosierung von Medikamenten und sogar die Tablettenbeschichtung.