3 Inch WA

3" WA Diaphragm Pumps In Every Wetted Material

This pump is the largest in the WA series, built for bulk transfer where plants are standardized on WA. It maintains the WA platform's consistent footprint and mounting, so it replaces existing units without rework.

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Models

One Model, Three Body Materials

The 3 inch WA pump is available in cast iron, stainless steel and aluminum. Choose based on fluid chemistry, weight limits and site conditions.

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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Who It Is For

Who Uses This 3 Inch WA Pump

Plants that have standardized on the WA platform and need a high-capacity pump for bulk transfer without changing installation layout.

Chemical plants transferring bulk acids, alkalis and solvents between storage tanks and process lines
Oil and fuel facilities unloading road tankers and IBCs at ground level
Metalworking shops moving large volumes of quenching oil and cutting fluid through recirculation loops
Waste water treatment plants feeding filter presses and dewatering systems at high flow
Pharmaceutical and food processing plants handling bulk additives and condiments with minimal shear

Metalworking And Machine Tools Chemical Processing Water And Wastewater Treatment

Problems Solved

Why This Pump Was Built for WA Standardisation

The 3 inch WA pump maintains the WA platform's consistent dimensions and mounting pattern, so it fits where older WA pumps were installed.

A new pump that does not match the base plate or port alignment, avoided by keeping the same mounting footprint and port positions as other WA models
A pump that cannot handle solids in the fluid, solved by a 9.5 mm solids passage with a flap valve design
A pump that requires frequent air system maintenance, reduced by a robust air distribution system designed for continuous duty
A pump that fails under high discharge pressure, addressed by a 8.3 bar maximum operating pressure rating
A pump that is too heavy for the support structure, solved by offering aluminum as a lighter body option

Core Advantages

Three Key Features of the 3 Inch WA Pump

Consistent WA Platform Fit

The pump uses the same mounting pattern, port positions and base dimensions as other WA series pumps, so it replaces older units without cutting pipework or reworking the base.

High Flow With Solids Handling

The 3 inch port and flap valve design allow 897 LPM flow and passage of 9.5 mm solids, ideal for transferring slurries and liquids with suspended material.

Multiple Body Options

Available in cast iron, stainless steel and aluminum. The aluminum version weighs 49.8 kg, the stainless steel version 100.8 kg, and the cast iron version 96.7 kg.

Range Data

Performance Specifications

The envelope for the 3 inch WA metallic pump, based on the data sheet.

Port size	3 inch
Maximum flow rate	897 LPM (237 GPM)
Maximum operating pressure	8.3 bar (120 psi)
Suspended solids max diameter	9.5 mm (3/8 inch)
Maximum dry suction lift	5.4 m (17.6 feet)
Body materials	Cast iron, stainless steel, aluminum
Weight	Aluminum: 49.8 kg (109.8 lbs), Stainless steel: 100.8 kg (222.2 lbs), Cast iron: 96.7 kg (213.1 lbs)

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 Applications for the 3 Inch WA Pump

Tanker Unloading

Self priming with a 5.4 m dry lift allows road tankers and IBCs to be emptied from ground level without additional priming equipment.

Bulk Transfer Between Tanks

High flow at 897 LPM supports rapid transfer between storage tanks in chemical and fuel handling operations.

Recirculation of Cutting Fluid

Handles fluid with metal chips and debris, maintaining flow during long cycles without clogging.

Filter Press Feeding

Delivers consistent flow under rising pressure, dead heads when the cake builds, and restarts after discharge.

Guides for the 3 Inch WA Pump

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

3" WA Diaphragm Pumps FAQ

Can I replace an older WA pump with this 3 inch model?

Yes, the mounting pattern, port positions and base dimensions are identical to other WA series pumps. No pipework changes are needed.

Which body material should I choose for caustic liquid transfer?

Stainless steel is recommended for caustic liquids. Cast iron is suitable for less corrosive fluids. Aluminum is lighter but not recommended for aggressive chemicals.

What is the maximum solids size this pump can pass?

The pump handles solids up to 9.5 mm (3/8 inch) in diameter. This is due to the flap valve design and 3 inch port size.

Is this pump compatible with my existing air supply?

The pump operates at up to 8.3 bar (120 psi). Ensure your air supply can deliver that pressure and has a clean, dry supply to avoid valve wear.

How long is the lead time for this pump?

Lead time depends on the body material and quantity. Send the model code and required quantity, and we will confirm the delivery date with the quote.

Specify the 3 Inch WA Metallic Pump for Bulk Transfer

Send the fluid, required flow, discharge head and available air pressure. We will confirm the best body material and provide the full model code.

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