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.

  1. Die beste Pumpe für Ihre Anwendung/
  2. Technologien/
  3. Membranpumpen

Built for the fluids other pumps cannot handle

The Verderair range of industrial and hygienic diaphragm pumps is designed and manufactured in-house by Verder Liquids 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

Diaphragm and body materials

Material Key properties Primary applications
PTFE Highest chemical resistance; FDA compliant; low friction Concentrated acids, solvents, oxidising chemicals, pharmaceutical and food-grade processes
EPDM Good resistance to dilute acids and alkalis; low cost Water-based media, food and beverage, paint and coatings, pharmaceutical
NBR Good petroleum and oil resistance; cost-effective Oil and fuel transfer, lubricants, general industrial use
Hytrel Highest abrasion resistance; excellent flex fatigue life Abrasive slurries, mining, wastewater with suspended solids
Santoprene Broad chemical resistance; long flex life General chemical transfer, water treatment, food processing
Neoprene Good water and weather resistance; UV stable Water-based slurries, seawater, general purpose

Diaphragm pump applications

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

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.