1-1/2" WA

1-1/2" WA Series Air Operated Double Diaphragm Pumps

This size sits in the middle of the WA platform. It serves transfer duties where a plastic pump is too light for the fluid, but a full metal pump is not needed. The choice is between aluminum, cast iron, stainless steel or polypropylene body.

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Models

Two Models, One Platform

The metallic version uses aluminum, cast iron or stainless steel. The plastic version uses polypropylene. Both share the same air end and mounting dimensions.

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

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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Who It Is For

Who Uses The 1-1/2" WA Pumps

Operations that need a mid range pump with a clear choice between metal and plastic wetted parts, without switching to a different platform.

Chemical plants transferring acids, alkalis and solvents where the fluid is corrosive but not highly abrasive
Food and beverage makers handling condiments or additives that require a non-metallic wetted surface
Machine shops pumping cutting fluid with small metal chips that need to be handled without clogging
Pharmaceutical facilities moving shear sensitive liquids that must not be contaminated by metal particles
OEMs integrating a pump into a system where the body material must match the rest of the process line

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

Problems Solved

What The 1-1/2" WA Pumps Solve

These models are built for users who need a pump that fits a standard line size and offers material choice without compromise.

A plastic pump that cannot handle the pressure or temperature of the fluid, solved by the metallic versions with higher strength materials
A metal pump that corrodes in the fluid, solved by the polypropylene version that resists most chemicals
A pump that does not match the existing flange or mounting, solved by shared dimensions across both models
A pump that fails on dry starts or long dry runs, solved by the air end design that handles dry operation
A pump that cannot move fluids with small solids, solved by the 6.4 mm solids handling capability

Core Advantages

Two Key Choices For This Size

Metallic Or Plastic Wetted Parts

Choose aluminum, cast iron or stainless steel for strength and heat resistance. Choose polypropylene for chemical resistance and non-metallic contact.

Same Air End, Different Body

Both models use the same air distribution system and mounting. Swapping between materials does not require changing the installation.

Dry Lift To 5.8 Meters

The pump can prime from a lower level and handle dry starts, making it suitable for transfer from drums or tanks without a foot valve.

Flow To 378.5 LPM

The plastic model reaches 378.5 LPM, which is sufficient for most mid range transfer and filling duties without needing a larger size.

Range Data

Performance Range

The envelope across both 1-1/2 inch WA models, taken from the individual data sheets.

Port size	1-1/2 inch
Maximum flow rate	340.7 LPM (90 GPM) to 378.5 LPM (100 GPM)
Maximum operating pressure	120 psi (8.3 bar)
Suspended solids max diameter	6.4 mm (1/4 inch)
Maximum dry suction lift	4.27 m (14 feet) to 5.8 m (19 feet)
Body materials	Aluminum, cast iron, stainless steel, polypropylene
Air inlet	1/2 inch BSPT female

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 1-1/2" WA Duties

Mid Range Transfer

Moving liquids between tanks, IBCs or drums where the flow rate is above 340 LPM but not requiring a 3 inch pump.

Filling And Packaging Feed

Supplying liquids to filling heads at a steady rate with minimal pulsation, especially when using the plastic model for non-metallic contact.

Chemical Transfer With Solids

Handling fluids with small particles like chips or precipitates, where the 6.4 mm solids capacity prevents clogging.

System Flush And Recirculation

Running dry at the end of a cycle during clean down, with the pump maintaining prime and restarting reliably.

Guides For The 1-1/2" 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

1-1/2" WA Diaphragm Pumps FAQ

What is the difference between the metallic and plastic 1-1/2" WA pumps?

The metallic version uses aluminum, cast iron or stainless steel for the body. The plastic version uses polypropylene. The air end and mounting are identical. Choose metal for strength and heat resistance, plastic for chemical resistance.

Can I use the plastic model for acid transfer?

Yes, polypropylene resists most acids, alkalis and solvents. Check the specific fluid against the material data sheet. It is not suitable for strong oxidizing agents or high temperatures.

What is the dry lift on the 1-1/2" WA pump?

The dry lift ranges from 4.27 m (14 feet) to 5.8 m (19 feet), depending on the model. The plastic version has a higher lift due to lower weight and better air flow.

Are the pumps ATEX certified?

We do not publish an ATEX certificate. The pumps are air driven with no electric motor. If you need certification for a hazardous area, contact us with your application details and we will provide available documentation.

How do I choose between aluminum, cast iron and stainless steel?

Aluminum is lighter and suitable for non-abrasive fluids. Cast iron is stronger and handles higher pressure. Stainless steel resists corrosion in aggressive fluids. Match the material to the fluid and operating conditions.

Select A 1-1/2" WA Pump For Your Duty

Tell us the fluid, the flow, the discharge head and whether you need metal or plastic wetted parts. We will confirm the model and send the full code.

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