1 Inch WA

1 Inch WA Series Air Operated Double Diaphragm Pumps

The 1 inch WA pumps are built for straightforward replacement and small volume transfer. They share the same mounting and port layout as other WA models, so they fit into existing installations without modification.

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Models

Two Models, One Platform

One metallic pump for durability in abrasive or high-pressure service, one plastic pump for chemical resistance in low-solids applications.

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 seals and metal fittings on a white background

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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Who It Is For

Who Uses These 1 Inch WA Pumps

Maintenance teams replacing a pump that failed in a small transfer line, or engineers who need a compact pump for a tight space.

Electronics plants transferring cleaning solvents and photoresist where chemical resistance is needed
Machine shops moving small batches of cutting fluid or quenching oil with minimal solids
Pharmaceutical labs transferring low-viscosity liquids with a need for low shear
Food processing lines handling condiments or additives that must not corrode the pump
OEMs integrating a small pump into a system where space is limited and a drop-in fit is required

Metalworking And Machine Tools Chemical Processing Water And Wastewater Treatment Electroplating And Surface Finishing

Problems Solved

What The 1 Inch WA Pumps Solve

These pumps address common issues in small transfer lines where a larger pump is overkill and a custom solution is not practical.

A failed pump that no longer fits the existing base, solved by matching the WA platform dimensions exactly
A pump that cavitates on low flow, addressed by the 1 inch design with a balanced air distribution system
A plastic pump that cracks under pressure, avoided by using a metallic body in high-pressure service
A metallic pump that corrodes in acid, prevented by using the polypropylene version in corrosive fluids
A pump that cannot handle small solids, fixed by the 1 inch metallic model with a 6.4 mm solids passage

Core Advantages

Two Key Advantages Of The 1 Inch WA Design

Drop In Fit

The mounting holes, port positions and base dimensions are identical to other WA series pumps, so swapping in a 1 inch WA model does not require new piping or supports.

Material Matched To Duty

The aluminum, cast iron and stainless steel versions handle higher pressure and solids. The polypropylene version resists acids, alkalis and solvents without degradation.

Range Data

Performance Range

The envelope across both 1 inch WA models, taken from their individual data sheets.

Port size	1 inch
Maximum flow rate	133 LPM (35 GPM) for metallic, 177.9 LPM (47 GPM) for plastic
Maximum operating pressure	120 psi (8.3 bar) for both models
Suspended solids max diameter	6.4 mm (1/4 inch) for metallic, 3.2 mm (1/8 inch) for plastic
Maximum dry suction lift	4.6 m (15 feet) for metallic, 6.1 m (20 feet) for plastic
Body materials	Aluminum, cast iron, 316 stainless steel, polypropylene
Weight	8.6 kg (19 lbs) aluminum, 14.1 kg (31 lbs) cast iron, 16.3 kg (36 lbs) stainless steel, 9.2 kg (20.3 lbs) polypropylene

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 1 Inch WA Duties

Small Transfer Lines

Moving small batches of liquid between tanks or process steps where a larger pump would be oversized and inefficient.

Like For Like Replacement

Swapping a failed pump in a system that uses the WA platform, without changing the mounting or piping.

Chemical Handling

Transferring acids, alkalis or solvents in a lab or small production line where material compatibility is critical.

Low Shear Transfer

Moving sensitive liquids like emulsions or suspensions where minimal agitation is needed.

Guides For The 1 Inch WA Pumps

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

1" WA Diaphragm Pumps FAQ

Can I replace a 1 inch WA pump with a different model?

Yes, as long as the new model is from the WA series and has the same port size and mounting dimensions. The 1 inch WA pumps are designed to be drop-in replacements for each other across body materials.

Which 1 inch WA model should I choose for acid transfer?

Use the polypropylene model for acids and alkalis. The metallic versions are not suitable for strong corrosive fluids and may degrade quickly.

What is the difference in suction lift between the metallic and plastic models?

The plastic model has a higher dry suction lift of 6.1 m (20 feet), while the metallic model lifts 4.6 m (15 feet). This makes the plastic version better for high lift applications.

Are the 1 inch WA pumps ATEX certified?

We do not publish an ATEX certificate. The pumps are air driven and do not use electric motors, which makes them suitable for use in hazardous areas. If certification is required, contact us to confirm what documentation is available.

How long is the lead time for a 1 inch WA pump?

Lead time depends on the body material and elastomer combination. Send the model code and quantity to [email protected] and we will confirm the delivery date with your quote.

Select A 1 Inch WA Pump For Your Application

Tell us the fluid, the flow rate, the discharge head and the solids size. We will recommend the correct model and send the full part number.

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