Industrial Air-Operated Diaphragm Pump Solution

1.What is an Air Operated Double Diaphragm Pump and how does it work?

WYMA® is wholesale AODD pumps, which are positive displacement pumps powered by compressed air and are mainly used to pump fluids of various properties. What makes our pump work is the way compressed air drives two flexible diaphragms back and forth in alternating motion. This action creates suction and discharge pressure, so fluid moves steadily without interruption. Here’s how it operates: compressed air enters one of the pump’s air chambers, which pushes the diaphragm outward. At the same time, the other diaphragm pulls back through a shared connecting shaft. That movement creates a negative pressure(vacuum) on the liquid side, drawing fluid in through the inlet. Once the diaphragm reaches the end of its stroke, the air valve automatically shifts. That redirects air to the opposite chamber, forcing the second diaphragm to push fluid out through the discharge port. Meanwhile, the first diaphragm retracts, which begins the suction cycle again. This back-and-forth rhythm between both diaphragms allows it to deliver a smooth and highly consistent flow.

2.What are the materials used to make this type of pump? What are the differences between these materials? What are their common applications? How many sizes does WYMA offer?

We use common materials like aluminum alloy, stainless steel, engineering plastic and PVDF in our pumps because each one behaves differently with the fluids being moved.

How we match a material to an application depends entirely on its chemical compatibility with the medium. For example, aluminum alloy resists corrosion well with neutral fluids—such as water and oils—but does not hold up well against acids, alkalis, or other aggressive chemicals. That’s why we often apply it to handle glaze, paint, oils, and solvents. Stainless steel offers broader corrosion resistance, which makes it a reliable choice for general chemicals, alcohols, liquid pharmaceuticals, and beverages. When it comes to pumping acids, alkalis, salts, and many organic solvents, engineering plastic stands up to most common corrosive fluids. For even more demanding applications involving highly aggressive media, in these cases, PVDF becomes the material we choose over standard plastics. Our pumps are available in different port sizes, which refer to the diameter of the inlet and outlet. These are always equal except for some PVDF models. You’ll find our aluminum alloy pumps in six sizes: 1/2″, 3/4″, 1″, 1-1/2″, 2″, and 3″. Stainless steel comes in four: 1″, 1-1/2″, 2″, and 3″. Engineering plastic pumps are offered in seven: 1/4’’, 3/8’’, 1/2’’, 3/4’’, 1’’, 1-1/2’’, 2’’. PVDF pumps come in five configurations where inlet and outlet sizes are differ—for example, 3/8''&1/2'', 3/8''&1'', 1-1/4''&1-1/2", 2''&2-1/2", 3''&4".

3.Are there other Air Diaphragm Pumps available?

Yes! In addition to the aforementioned material-based options, we also offer aluminum alloy multi-function pumps. The versatility, which lies in their ability to connect to the air spray gun for paint spraying, can also accommodate double-in, single-out or double-in, double-out configurations. Customers can choose according to their specific needs. We currently offer two sizes of multi-function pumps: 3/8" and 1/2".

4.What are the main features and advantages of a pneumatic diaphragm pump?

Excellent sealing and leak-free operation: The pump has no mechanical seal components inside, effectively preventing fluid leakage. It is particularly suitable for conveying toxic, hazardous, corrosive, or expensive fluids.

Dry-priming capability: The pump can be operated without fluid (i.e., dry-running) without damage, making it an essential safety feature for some special operating conditions.

Adjustable flow & air pressure: This pump's flow rate and lift can be easily controlled by adjusting the air inlet and flow regulator, providing high flexibility.

Applicable media: This pump can handle fluids of various viscosities, including low-viscosity aqueous fluids, high-viscosity slurries, and fluids containing solid particles.

Simple structure and easy maintenance: The pump has relatively few parts, making disassembly, assembly, and maintenance relatively simple.

5.What are the main performance parameters of this pump? What do they mean?

For Air Paint Spray Diagram Pump, there are generally three main performance parameters: Flow Rate, Suction Height & Particle Diameter. A pump’s Flow Rate measures the sheer volume of fluid it moves within a set timeframe, which technicians usually expresse in LPM, GPM, or m³/h. This figure reveals the machine's fluid delivery strength and dictates the total workload the pump can finish within a certain time limit. When you opt a pump for a specific project, the peak flow rate should be ensured according to our actual needs. And what about Suction Height? It indicates the max vertical distance a pump can draw fluid from below the liquid level, usually in meters(m) or feet(ft). This value directly represents the pump's suction capacity, determining whether the pump has sufficient vacuum strength to empty the bottom of deep tanks or draw material from distant storage tanks. Finally, the Particle Diameter represent the solid diameter that can travel through the internal chambers without causing a clog. Because diaphragm designs vary across different models, this number tells you exactly which slurries, muds, or impure liquids the pump can survive. If your process involves heavy particulates, checking this spec ensures the pump handles the grit rather than seizing up mid-operation.

6.How does WYMA guarantee the quality of its pumps?

All of our Pneumatic Diaphragm Pumps are certified by the EU Mechanical MD-CE standard, ensuring safety, reliability, and durability. Customers can purchase with confidence.

7.Do WYMA stock all of pumps?

Yes, we stock all the models shown on our website. Please feel free to contact our professional team for details on quantity requirements and other details.

8.Can we customize the colors or include our logo?

No problem, we offer custom colors and logos. Please feel free to discuss customization details with our professional team.

9. How can I request the latest quote from WYMA?

You can click "Send Inquiry" on the top of the product introduction page of our website to jump to the inquiry content form to send us an inquiry. Our staff will reply to you as soon as possible to communicate the details and tell you how to place an order. Alternatively, you can contact us through the following contact information.

For 24 hours contact details as below:

Email:

sales01@wymatools.com / sales03@wymatools.com

Tel / WhatsApp / Wechat:

+86-133 6036 8438 / +86-136 2252 8472