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.

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.

What is Verderair+ and how is it different from a standard air-operated diaphragm pump?

Verderair+ is an industrial air-operated diaphragm pump series built around a patented air valve design. Unlike conventional AODD pumps, the Verderair+ uses all available compressed air for moving fluid rather than wasting a portion through inefficient valve switching. The result is lower air consumption, quieter operation, and reduced running costs. It is fully manufactured in Europe, with an externally serviceable air valve that makes maintenance fast and straightforward.

What materials are available for Verderair+?

Verderair+ is available in both metallic and non-metallic construction, with a wide range of wet-side materials to match your fluid and application requirements. Whether you are handling aggressive chemicals, abrasive slurries, or viscous media, there is a material combination suited to your process. Contact a pump expert to discuss which configuration is right for your application.

Is Verderair+ ATEX certified?

ATEX certification is available across the Verderair+ range. Please refer to the individual model datasheets or contact our team to confirm the specific certification for the model and configuration you require.

How does the QR code on a Verderair+ pump work?

Every Verderair+ pump carries a QR code on the body of the pump. Scanning it gives you direct access to the ordering page for that specific pump and its compatible spare parts, as well as assembly and maintenance videos. It is designed to save time in the field, removing the need to search for documentation or part numbers manually.

Will I still have my personal contact person?

Yes. The customer portal complements your personal contact. Your usual sales contacts remain available as before.

Yes. The portal uses email verification and additional security checks during login. When signing in, you will receive a verification code by email that must be entered to access the portal. This helps ensure that only authorized users can log in. Access to the portal is restricted to approved users from your organization, and each user must create and manage their own account using their professional email address.

I don't have access to the customer portal?

If you do not yet have access or are unable to log in, please use our contact form.

I forgot my login details – what should I do?

Access to the Verder Customer Portal is managed through individual user accounts with email verification. Forgot your password? 1. On the login page, click “Forgot password”. 2. Enter the email address associated with your account. 3. Click “Submit”. 4. You will receive an email with a link to create a new password. 5. Follow the link and set a new password. No longer have access to your email address? Please contact the Verder support team so your access can be reviewed and updated.

Is there a charge for using the Verder Customer Portal?

The Verder Customer Portal is a free service for customers. There are no costs for using or accessing the portal. The customer portal is an additional digital order and information channel. Your usual sales contacts remain available for personal exchanges and to handle your business processes as usual.

What are the benefits of the Verder Customer Portal?

The Verder Customer Portal enables you to centrally and efficiently manage your pumps, spare parts, and orders throughout the entire lifecycle of your equipment. o Central overview of pumps, spare parts, orders, prices, delivery status, invoices, and credit notes o Direct access to all relevant information, documents, and technical data for your installed pumps o Fast and easy reordering directly from the installed pump or via order history o Accurate product and spare part selection tailored to your specific installation o Custom lists, printable overviews, and transparent processes o 24/7 availability with one‑click ordering o Secure login o Long‑term support for your pumps throughout their entire service life

Are IT security and data protection ensured?

Protecting your data is a top priority for us. The Verder Customer Portal uses modern security standards and email verification to ensure secure and controlled access. Specifically: Login requires your individual user account and password During login, a verification code is sent to your email address to confirm your identity Access is limited to authorized users from your company Each user must create and manage their own account using their professional email address User access can be deactivated immediately if required The portal only accesses the information necessary to provide the service This ensures that access to the portal remains secure, controlled and compliant with current data protection standards.

How does the login process work?

Access to the Verder Customer Portal is managed through individual user accounts and email verification. When signing in, you use your professional email address and password. During the login process, a verification code is sent to your email address, which you must enter to complete the sign-in. This additional step helps ensure that only authorized users can access the portal. This means in practice: Access is limited to authorized users from your company Each user must create and manage their own account using their professional email address Email verification codes provide an additional layer of security during login User access can be reviewed and deactivated when necessary The portal follows modern security and data protection standards This approach provides a secure and reliable way to access the customer portal while ensuring that only approved users from your organization can log in.

Why does my centrifugal pump deliver less than indicated on the nameplate?

This can have several causes. First, it must be checked that the pump is running in the right direction as indicated on the nameplate and manual. A centrifugal pump that turns in the wrong direction takes a lot of motor power, but delivers almost no flow. In addition, the capacity of the pump also depends on the speed of the pump. For the remainder of this explanation, we assume that the direction of rotation and speed are correct. The flow that a centrifugal pump delivers, is always a balance between what the pump can do and what the pipework connected to the pump allows. The pressure that a centrifugal pump (at a fixed speed) creates, will decrease slightly with the flow rate, but it is quite constant all in all. However, to push a larger flow through a pipe work, more and more pressure is needed. This necessary pressure consists partly of a static height difference (you want to use the pump to pump the liquid from low to high) and partly of friction losses. The static height difference is independent of the pumped flow, the friction losses with centrifugal pumps (which pump low viscous liquids) are usually quadratically proportional to the flow. So to pump twice the flow through a pipework, the pump has to press 4 times as hard, so 4 times more head is needed. When pumps deliver less flow than expected and than indicated on the pump nameplate, in practice the pump usually delivers the pressure indicated on the nameplate, but not the desired flow rate. The cause for this is not caused by the pump, but by an incorrect estimate of the friction losses. In other words: the pump delivers the expected pressure, but the pipework allows less flow at this pressure. In order to be able to pump the desired flow through the pipework, the pump would have to press harder, in other words more pressure is needed; requires more pressure than indicated on the pump nameplate. In other words, the pump delivers the pressure expected, but more pressure is needed to push the desired flow through the pipework. There are 2 possible reasons why a pump does not deliver the indicated pressure: - Either the pumped liquid is gaseous. Due to the gas phase in the liquid, the average specific gravity ρ is lower than that of water and the formula ρ * g * h produces a lower pressure. At higher gas concentrations, even a gas bubble collects in the impeller eye and the pump delivers even less pressure. - Either the pump is cavitating. Cavitation also collects a gas bubble in the impeller of the pump.

From which point is it better to switch from centrifugal to positive displacement pump (lobe/twin)?

In centrifugal pumps, the pressure is generated by centrifugal forces. These are themselves generated by the rapid rotation of the liquid in the pump casing. Centrifugal pumps therefore require speed to generate pressure. The greater the pressure required, the greater the internal fluid velocity in the pump. Viscosity creates friction in the fluid located between the impeller and the pump casing. This fluid friction creates resistance to spinning. So power is needed to overcome this friction. An increasing viscosity therefore increases the power consumption of the pump. This increase is all the faster at high speeds or therefore with pumps that have to deliver a high pressure. The impact of the viscosity on the power of centrifugal pumps delivering low pressure is smaller. Therefore, a centrifugal pump is not a good choice for generating high pressures with highly viscous liquids. With lobe pumps and screw spindle pumps, there is always a small play between the rotors and between the rotors and the pump casing. In order to make the pump as efficient as possible, these clearances are kept as small as possible, but to prevent the rotors from running into each other or in the pump casing, they are always present. These clearances form an open connection between the outlet and the inlet of the pump. With thin viscous liquids, these clearances between the rotors and between the rotors and the pump casing create an internal leak: some liquid is forced from the outlet of the pump (where there is a higher pressure) through this narrow passage back to the inlet. (where there is a lower pressure). This internal leakage rate increases as the viscosity of the pumped liquid decreases. Therefore, volumetric pumps are less efficient with low viscous liquids. The question now arises as to which viscosity a centrifugal pump is the better choice and from which viscosity it is better to choose a volumetric pump. The answer to this question is that it depends not only on the viscosity, but also on the required head and flow. So you cannot give a fixed viscosity value where it is better to switch from centrifugal to volumetric. With a high pressure head and a small flow rate, switching is better at a lower viscosity, while at a high flow rate with a low pressure head you can stay longer with a centrifugal pump. The example below should make this clear. When selecting a pump for 5 m³/h - 4 bar pressure, even with water (viscosity 1cP) less power is required with a rotary lobe pump than with a centrifugal pump. When selecting a pump for 40 m³/h - 1 bar pressure, a centrifugal pump still requires less power than a volumetric pump, even at a viscosity of 1,000 cP. In addition to the necessary power, the initial cost and maintenance costs also play a role in the choice of pump technology.

What is shear in a liquid and why is this important?

Shear is the difference in speed between 2 layers in the liquid. The degree of the shear is expressed by the shear rate, which represents the velocity gradient in the liquid. When 2 layers of liquid that are 1m apart have a speed difference of 1 m/s, then there is a shear rate of 1/s in the liquid between these 2 layers. As soon as a liquid is in motion, shear is created. The velocity is never the same for each liquid droplet, so there is always a relative movement of one droplet versus the other, thus creating shear. Even with so-called plug flow, shear will form on the wall because this wall is stationary or moves faster than the liquid and thus slows down or entrains the liquid. In pumps, there are moving parts as well as stationary housing. In view of the small distance between the moving parts and the housing, a large velocity gradient or high shear rate will develop in the fluid between them. The flow will also cause shear in the supply and discharge pipes, albeit a lower one. Shear cannot be avoided and is not a problem in itself. Sometimes a high degree of shear is even desirable. For example, in a high-shear pump a high shear rate is generated to form emulsions or dispersions, or in general, to mix liquids that are difficult to dissolve into each other more or less stably. However, the impact of shear on the microstructure of a fluid is not always positive or desirable. Shear, for example, can also damage sensitive liquids. Due to the shear stress between the liquid particles, an impact on the viscosity of the liquid is also seen in many complex liquids. Liquids whose viscosity is not influenced by the shear rate are called Newtonian liquids. They are typically chemically simple liquids: water, oil, sugar solutions, ... With much more complex liquids (preparations), the viscosity will decrease as the shear rate increases. These liquids are called thixotropic. As soon as the shear rate decreases, the viscosity increases again. The shear does not destroy the liquid structure and will not change it permanently. This means that a thixotropic liquid has the highest viscosity in a tank where it is at rest, so no shear. Due to the shear created by flow through a pipe, the viscosity decreases. In a pump, where the shear rate is much higher, the viscosity is at its lowest. When the liquid leaves the pump, the viscosity recovers as the shear rate falls back. With a small group of liquids, the viscosity actually increases with a higher shear rate. These liquids are called dilutant. Examples of dilatant liquids are honey and concentrated starch solutions. Due to their dilatant behaviour these liquids are very difficult to pump. The influence of the shear rate on the viscosity of these three types of liquids is shown graphically here:

What is the influence from speed on the pumpcurve of a centrifugal/rotary lobe pump?

The pump curve of a centrifugal pump gives the head, the absorbed power, the efficiency and the NPSH in function of the flow at a fixed speed. Usually the pump curve is published for water, or even: for a liquid with a specific weight of 1 kg / liter and a viscosity of 1 centipoise. With centrifugal pumps there is a formula to convert the pump curve from one speed to another: - Flow is directly proportional to speed - Head and NPSH are quadratically proportional to speed - Power input is proportional to speed to the power of three - Efficiency is independent of speed A lobe pump is a volumetric pump and therefore the flow rate delivered and the required power are initially directly proportional to the speed. This is also the case with highly viscous liquids and you can easily state that the flow and power vary linearly with the speed. The flow is the so-called stroke volume of the pump multiplied by the speed of the pump. The stroke volume of a rotary lobe pump is the volume of liquid that is moved per revolution of the rotors from the suction to the discharge of the pump. However, with thin-viscosity liquids, leakage occurs between the rotors and between the rotors and the rotor casing, causing the pump to deliver less flow. Before explaining the influence of speed on the pump curve with thin-viscosity liquids, we will first discuss the construction of the pump curve with water as an example. Per revolution, the pump initially moves the volume of water from the suction to the press again. However, under the influence of the pressure difference over the pump, a certain amount of water continuously flows back from the press (where there is a higher pressure) to the suction of the pump (where there is a lower pressure). This leakage flow rate is proportional to the square root of the pressure difference across the pump. So with a small pressure difference across the pump, this leakage flow rate will be small and most likely smaller than the flow rate of water the pump displaces through its rotation (the higher explained stroke volume * speed). Net, the pump still pumps water from the suction to the press. If the pressure difference across the pump becomes large, the leakage rate can exceed the volume the pump moves through the rotation and eventually net water flows from the press to the suction of the pump. In the graph shown here this is the case with a pressure difference greater than 7.5 bar. The leakage rate is independent of the speed. So if we increase the speed, then: - the flow we transfer from the suction to the press through the rotation will increase linearly with the speed - the leakage rate will remain the same Since the net flow the pump pumps is the difference between the two, the pump curves will shift upwards in parallel with increasing speed. You can see that visualized here.

Download Here Updates and New features Add dynamic update of time in Date/Time Settings page. Add settings restore icon UI button in Diagnostic page. Enabled I2T safety protection on motor. Allow to prime pump even when remote stop is active. Reduce flow rate updates to EEPROM in 4-20mA mode. Factory reset will be enforced at first run automatically. Implement settings restore function. Configure remote stop input pin settings based on user settings and add "Link Cable" option in Digital Output selection in I/O Settings page. Factory reset will be enforced at first run automatically. Implement settings restore automatically during firmware update. Add WiFi setup prompt on startup after factory reset. Implement WiFi module check at pump startup. Implement changes in 4-20mA high level input handling. Change 4-20mA output range for "Full Scale" mode. Implement adaptive motor feedback position error limit. Flash red LED quickly when display update has failed. Enhance RTC driver to reduce read time error. Improve contact pulse detection logic for more accurate timing. Change ADC sampling time to give a more accurate 4-20mA input reading. Implement logs upload to server via Device Update API. Implement maximum speed option in pump settings. Add boundary checking when setting maximum and current volume in fluid monitor page. Show alert pop up when fluid recovery is unavailable when there is no input in 4-20mA mode. Remove lower limit (10% of max speed) checking in setting 20mA scaling percentage. Log to flash when default calibration offset has been applied. Add "No Network" and "Scan Error" warning messages after a failed WiFi scanning. Add "PIN Code" label in WiFi setup page when returned from server. Change colours of the toggle switch. Show error pop up in operating page when motor failure is recovered during splash page. Flash red / white LEDs to indicate display update failure. Do not allow user to start flow calibration while prime tube alert is still on screen. Connect WiFi SSID with strongest signal strength. Display pairing PIN code in WiFi setup page for multi-tenancy support. Display WiFi setup prompt at startup if data reset to default because of settings version changed. Add “Total Pump Runtime” element in WiFi payload. Bug Fixes Fix in updating flow rate to server when selection arrow is pressed in Operating page. Fix flashing red LED when motor cable is disconnected at startup. Fix current volume in fluid monitor page not restored after a power cycle. Fix firmware update issue when hardware configuration EEPROM has not been programmed. Fix WiFi scanning issue after factory reset and WiFi setup prompt being skipped. Fix display corrupt issue after firmware update. Fix prime active / inactive logging on diagnostic page. Fix prime not working after flow rate changed by UP / DOWN arrow. Fix and align pump length to 10 characters in settings and UI. Fix issue in driver in reading motor registers. Fix issue in exported diagnostic log on USB flash.

I want to know more about Verder

Verder Liquids is a leading global manufacturer of industrial and hygienic pump solutions and part of the Verder Group. As a worldwide technology leader, we provide advanced pumping solutions as well as state-of-the-art analytical equipment to thousands of customers around the globe. Vital components, which help them to ensure economic, technological, and environmental progress. Day by day, to the benefit of many. Could there be a better explanation for our constant search for the better? Visit out Verder Group website

How can I contact Verder Liquids?

You can reach our pump experts via our contact form. They are more then happy to answer all your questions.

I am searching for documentation

Visit our Library; it contains literature, best practices, applications, manuals datsheets, brochures and more

What is the difference between an AODD and EODD.

An AODD is an Air Operated Double Diaphragm pump and an EODD is an Electric Operated Double Diaphragm pump. AODD pumps are driven by compressed air and EODD pumps are driven by a motor.

How can I order spare parts?

Write down the serial number of your pump and give us a call! We're always happy to help you.

Can I have a pump delivered on short notice?

Please allow 5 working days delivery time for our products.

Where are your pumps manufactured?

Our pumps are manufactured in Belgium.

How can I change a hose on my pump?

Changing a hose on your Verderflex pump is very easy. Please view our online tutorial. If this doesn’t help you, our pump experts can help you!

How does a peristaltic pump work?

A peristaltic pump is positive displacement pump that transfers a wide variety of fluids. This pump doesn’t have valves, seals and glands and it’s an inexpensive pump to maintain. Every peristaltic pump features flexible hoses or tubes, giving an open flow path which gives a high resistance to abrasion and permits the easy flow of solids and viscous media. Find out more about how a peristaltic pump works here.

What kind of pump is a Verderair pump?

Verderair pumps are air operated diaphragm pumps (AODD), delivering a smooth, reliable flow for all circumstances. The air valves design guarantees a perfect, non-stalling operation, even at low pressure. The air valves do not need any lubrication. Thanks to their unique design, the pumps are able to handle very abrasive and/or viscous products.

Are spare parts available for this pump?

Yes, spare parts are available to order for this pump. We offer maintenance kits, repair kits, dampeners, flow stop valves and all other relevant accessories. You can find more about spare parts here.

Diaphragm Pump

Name: One Minute with your Pump Expert - Diaphragm Pumps
Uploaded: 2025-01-27T13:17:47+01:00
Description: One Minute with your Pump Expert - Diaphragm Pumps

AODD and EODD diaphragm pumps, designed and manufactured

in-house by Verderair.

For chemical, hygienic, and demanding industrial fluid handling across

more than 20 global markets.

Contact an expert Browse the Verderair Range

Diaphragm pumps

A diaphagm pump, also knows as a membrane pump, is a positive displacement pump that enables users in industries to standardise on a pump type that is suitable for a wide variety of fluids. Verderair diaphragm pumps, manufactured in-house and to the highest standards in the industry, are available in different materials, both metallic and non metallic, to suit any specific needs in fluid handling, no matter how difficult.

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?

How does a diaphragm pump work?

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.

Contact an Expert

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

Our Verderair diaphragm pump range

Verderair VA

Available in metallic and non-metallic construction with many different wet-side materials, the VA range is compatible with chemically-aggressive and abrasive media.

Max. flow	1200 l/min
Max. discharge pressure	8,6 bar

View this pump type

Verderair PURE

The Verderair PURE is designed for heavy-duty operation, harsh chemicals and severe process conditions.

Max. flow	660 l/min
Max. discharge pressure	7 bar

View this pump type

Verderair HC-PURE

Our Verderair HC-PURE pumps are specifically designed with ultimate cleanibilty in mind which ensures hygienic durability for your pumps.

Max. flow	465 l/min
Max. discharge pressure	7 bar

View this pump type

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	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
Metallic	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

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

Pharmaceutical and Cosmetic

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

Diaphragm Pumps in Pharmaceutical and Cosmetic

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

Diaphragm Pumps in Battery Production

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

Diaphragm Pumps in Mining and Minerals

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 Pumps in Water Treatment

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.

What are you pumping?

If the fluid is chemically aggressive, select PTFE material configuration and a non-metallic body (Verderair PURE). For abrasive slurries, prioritise Hytrel diaphragms (Verderair VA). For food-grade, beverage, or pharmaceutical media requiring FDA and EC 1935/2004 compliance, select a hygienic body design (Verderair HC-PURE).

Speak to an engineer

What flow rate and pressure do you need?

Verderair AODD diaphragm pumps cover from below 10 l/min up to 1,200 l/min and discharge pressures up to 8.6 bar. Our engineers can provide pump curves for your specific duty point to confirm the correct model and size.

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Air or electric drive?

If compressed air is available on site and the environment is hazardous or portable operation is needed, an air operated diaphragm pump is the natural choice. If energy efficiency or precise flow control is a priority, the Verderair electrically operated EODD will deliver lower operating costs over the pump lifetime.

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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.

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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.

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How does a Diaphragm Pump work?

A diaphragm pump operates by using a flexible diaphragm that moves back and forth to create a variable volume within the pump chamber. As the diaphragm moves up, it creates a vacuum, drawing fluid into the chamber. When the diaphragm moves down, it pushes the fluid out of the discharge valve. This type of pump is often used for its reliability and ability to handle various fluids without contamination, as the fluid does not come into contact with moving parts like gears or pistons.

How do Diaphragm Pumps work?

Types of diaphragm pumps

Our Verderair range consists of two different types of diaphragm pump, air operated double diaphragm pumps, and electrically driven double diaphragm pumps. As their names imply, the key difference between the two would be the way the operate, with the former being driven by compressed air, while the latter is operated using an electric motor.

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Diaphragm Pump Applications

Our diaphragm pumps have high versatility and reliability in handling a diverse range of fluids and in varying conditions. Some of the applications include

Chemical applications: some of the applications of a diaphragm pump in the chemical industry include metal surface treatment, unloading tankers, dosing additives and polymers, as well as pumping additives with sulfuric acid. The Verderair PURE is our ideal pick for these applications.
Food and beverage: a diaphragm pump is also suitable for applications in the food and beverage industry. From preparation, to transport, to filtration, pasteurization and even CIP. A Verderair diaphragm pump, with its different possible combinations of materials and certifications, is a perfect choice for the food and beverage industry.
Battery production: lithium battery production can be a lengthy process and thankfully, Verderair diaphragm pumps are essential to various steps in the production of these products. A diaphragm pump,is essential in steps within the process such as floccuent dosing, filter press, as well as unloading. One diaphragm pump in particular, the Verderair e-PURE excels and is the most popular choice of pump for acid leaching & crystallisation, as well as its dosing and transfer due to its chemical compatibility.
Pharmaceutical applications: within the pharmaceutical industry, diaphragm pumps play a vital role within different areas. Some of the most popular applications include within soap and detergents, transferring of chemicals, media preparation, precise dosing of medicine and even tablet coating.

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Our Verderair diaphragm pump range

Verderair VA

Verderair PURE

Verderair HC-PURE

Diaphragm materials

Body materials

Chemical processing

Food and beverage

Hygienic applications

Pharmaceutical

Battery production

Mining and minerals

Water treatment

Chemical Processing

Food and Beverage

Pharmaceutical and Cosmetic

Battery Production

Mining and Minerals

Water treatment

Manufactured in-house

ATEX certified for hazardous areas

Anti-stall air valve design

Broad material compatibility

Global support in 20+ markets

Proven service life

What are you pumping?

What flow rate and pressure do you need?

Air or electric drive?

Diaphragm Pumps

How do EODD pumps compare to AODD on energy consumption?

What is the difference between the Verderair PURE and the Verderair VA?

Can a Verderair diaphragm pump handle solids?

What diaphragm materials are available?

Are Verderair diaphragm pumps ATEX certified?

What is the maximum flow rate of a Verderair diaphragm pump?

Question about how a diaphragm pump works?