WA Series

WA Series Air Operated Double Diaphragm Pumps

WA is a separate product line maintained alongside DP3X. It serves users who already operate WA pumps or need metallic and plastic bodies across 1 inch to 3 inch on a dedicated platform. No DP3X features are claimed.

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Models

Seven Models Across Two Body Types

Metallic bodies in aluminum, cast iron and stainless steel, plastic in polypropylene. All models share the same port sizes and pressure rating.

Black industrial double diaphragm pump with green seals and metal fittings on a white background

WA Series

2 Inch WA Series Metallic Air Operated Double Diaphragm Pump

651 LPM at 8.3 bar from a 29.6 kg aluminum body. The WA Series option for volume and material flexibility.

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Front view of a black industrial double diaphragm pump with brass center.

WA Series

1 Inch WA Series Metallic Air Operated Double Diaphragm Pump

133 LPM and 8.3 bar from a compact 8.6 kg aluminum body. The smallest metallic pump in the WA Series.

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Black industrial double diaphragm pump with green gaskets and metal feet on a white background

WA Series

1-1/2 Inch WA Series Metallic Air Operated Double Diaphragm Pump

340.7 LPM from a 23.4 kg aluminum body. A compact, rugged pump for tough transfer duty.

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Front view of a black industrial double diaphragm pump with green gaskets on a white background.

WA Series

3 Inch WA Series Metallic Air Operated Double Diaphragm Pump

897 LPM and 8.3 bar from a 49.8 kg aluminum body. The largest volume pump in the WA series.

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WA Series

1-1/2 Inch WA Series Plastic Air Operated Double Diaphragm Pump

378.5 LPM and 8.3 bar from a 28.1 kg polypropylene body. The chemical duty workhorse of the WA Series.

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WA Series

2 Inch WA Series Plastic Air Operated Double Diaphragm Pump

145 GPM from a 28.1 kg polypropylene body. A chemically resistant pump for acids, alkalis and solvents.

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WA Series

1 Inch WA Series Plastic Air Operated Double Diaphragm Pump

177.9 LPM and 8.3 bar from a 9.2 kg polypropylene body. A robust plastic pump for corrosive and abrasive fluids.

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By Port Size

Port Sizes From 1 Inch To 3 Inch

Choose the size that matches your piping, then select the body material that suits your fluid and environment.

1" WA Diaphragm Pumps

Two 1 inch WA pumps, one metallic, one plastic. Designed for like for like replacement and small transfer duties.

1-1/2" WA Diaphragm Pumps

Mid range transfer on the WA platform. Two models with metallic or plastic wetted parts, flow to 378.5 LPM, solids to 6.4 mm.

2" WA Diaphragm Pumps

Two 2 inch WA pumps for high volume transfer. Metallic and plastic bodies, 651 LPM max flow, 8.3 bar pressure, 6.4 mm solids.

3" WA Diaphragm Pumps

The largest metallic pump in the WA series. 3 inch port, 897 LPM flow, 8.3 bar pressure, 9.5 mm solids handling.

Who It Is For

Who Uses The WA Series

Operators who have standardized on WA pumps, or who need a second platform for body material variety without changing size or pressure.

Chemical plants using both metallic and plastic pumps for different fluids, with no need to switch platforms
Machinery builders who need a consistent pump size across multiple materials for a single machine line
Plants that require polypropylene bodies for strong acids or alkalis, with metallic options for high-pressure transfer
Facilities that already have WA pumps in service and want to maintain spare parts compatibility
Users who need a 3 inch pump with a polypropylene body for high flow and chemical resistance

Metalworking And Machine Tools Chemical Processing Water And Wastewater Treatment

Problems Solved

Why WA Exists As A Separate Platform

The WA series was not redesigned to fix DP3X issues. It was kept as a stable platform for users who rely on its consistent design and part interchangeability.

Replacing a WA pump with a DP3X model requires checking fit and part compatibility, which is not guaranteed
Some users need a polypropylene body in 3 inch, which is not available in the DP3X series
Operators with existing WA installations avoid retraining and retooling by sticking to the same platform
The WA series supports older model codes that are still in use, even if newer designs exist
Certain body material combinations, like aluminum in 1-1/2 inch, are only available in WA

Core Advantages

Key Features Of The WA Platform

Consistent Design Across Models

All WA pumps use the same air end and mounting dimensions. A 1 inch model can be swapped with a 3 inch model without changing the base plate or piping.

Material Variety In One Size

Each port size offers multiple body materials. For example, 1-1/2 inch WA pumps are available in aluminum, stainless steel and cast iron.

Plastic Bodies In Larger Sizes

Polypropylene bodies are available in 1-1/2 inch and 2 inch, which are not offered in the DP3X series.

No Performance Claims From DP3X

The WA series does not include the air distribution improvements or ceramic seals found in DP3X. It is not designed to match those features.

Range Data

Range Performance

The envelope across all seven WA models, taken from the individual data sheets.

Port sizes	1 inch, 1-1/2 inch, 2 inch and 3 inch
Maximum flow rate	133 LPM at 1 inch up to 897 LPM at 3 inch
Maximum operating pressure	120 psi (8.3 bar) across the series
Suspended solids max diameter	3.2 mm at 1 inch, 6.4 mm at 1-1/2 and 2 inch, 9.5 mm at 3 inch
Maximum dry suction lift	4.27 m to 8.3 m depending on model
Body materials	Aluminum, cast iron, 316 stainless steel, polypropylene
Air inlet	1/4 inch to 3/4 inch BSPT female, NPT available on request

Performance figures are transcribed from the Nuodean data sheet for this pump. Flow is measured at the pump discharge with water at ambient temperature; your duty point depends on air supply pressure, suction conditions, fluid viscosity and discharge head. Ask our engineers to confirm the duty point before you order.

Application Scenarios

Typical WA Series Duties

Chemical Transfer With Material Variety

A single plant uses aluminum for water, stainless steel for acids, and polypropylene for alkalis, all on the same 2 inch size.

Bulk Tank Unloading With Plastic Bodies

A 3 inch polypropylene WA pump handles high flow from a tank farm without corrosion, while a 2 inch aluminum model handles clean water.

Machine Shop Fluid Circulation

A 1-1/2 inch cast iron WA pump moves cutting fluid through a machine tool, while a 1 inch stainless steel model handles coolant.

Replacement Without Reengineering

A 1 inch WA pump fails. The replacement is ordered from the same model code, and the base plate and piping remain unchanged.

Guides For The WA Range

Comparison

DP3X Or WA Series Which Nuodean Pump Should You Buy

Compare the two core Nuodean AODD pump platforms to determine whether your facility needs the current generation DP3X or a direct like for like WA replacement.

Buying Guide

How To Size An Air Operated Double Diaphragm Pump

Sizing an air diaphragm pump from the existing pipe size or the headline maximum flow guarantees poor performance. Here is how to select the right displacement and port size from actual duty conditions.

Material Guide

Choosing The Right Diaphragm Material For Your Fluid

Diaphragm selection is a balance between mechanical flex life and chemical compatibility. Pick the right material to avoid premature failures and process contamination.

Answers

WA Series AODD Pumps FAQ

Is the WA series compatible with DP3X parts?

No. The WA series uses a different air end and mounting design. Parts from DP3X pumps are not interchangeable with WA models.

Why does the WA series have polypropylene in 2 inch and 3 inch?

These sizes are not available in the DP3X series. The WA platform supports polypropylene bodies in larger sizes for chemical transfer and corrosion resistance.

Can I upgrade from WA to DP3X?

Yes, but the air end, mounting and piping may not match. Check the drawings and dimensions before ordering. We can provide a comparison if needed.

Are the WA pumps ATEX certified?

We do not publish an ATEX certificate. The pumps are air driven with no electric motor, which is why AODD pumps are often specified in hazardous areas, but if you need certification for the installation ask us first and we will tell you exactly what documentation exists.

What lead time should I plan for?

It depends on the model code and the quantity, since material combinations are built to order. Send the code and the quantity and we will confirm a date with the quotation.

Specify A WA Pump For Your Duty

Send the fluid, the flow, the discharge head and your available air pressure. We will pick the size, the body material and the elastomers and send the full model code.

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