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

The WA66615X is a 1-1/2 inch metallic AODD pump in the WA Series, built for reliable transfer in chemical, industrial and process environments. It delivers up to 90 GPM, which is 340.7 LPM, at 120 psi or 8.3 bar, lifts 5.8 m dry, and passes suspended solids to 6.4 mm. The pump is available in aluminum, cast iron or 316 stainless steel, so it matches the fluid and environment. The air motor is stall free, so it starts under load and does not hang at mid stroke.

Maximum flow rate	90GPM(340.7LPM)
Maximum operating pressure	120psi(8.3bar)
Suspended solids max diameter	1/4"(6.4mm)
Fluid inlet	1-1/2"BSPT Or 1-1/2"NPT
Fluid outlet	1-1/2"BSPT Or 1-1/2"NPT

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Metalworking And Machine Tools Chemical Processing Water And Wastewater Treatment

Key Benefits

What The 1-1/2 Inch Metallic Build Buys You

The WA Series is a separate platform from DP3X, with its own design and performance profile.

Compact And Rugged For Tight Spaces

At 23.4 kg in aluminum, it is lighter than the 2 inch version and fits where larger pumps cannot. The bolted construction keeps the fluid path leak free, and the rugged body handles vibration and shock on a mobile or skid mounted setup.

Stall Free Operation In All Conditions

The air motor shifts the major valve positively, so the pump does not hang at mid stroke when starting under load or when the discharge is blocked.

Easy Access For Maintenance

Fluid caps and ball checks are accessible without removing the entire pump. This reduces downtime during routine checks or part replacements.

Material Choice Matches Fluid Risk

Aluminum for general duty, cast iron for abrasion resistance, 316 stainless steel for corrosion and hygiene. The model code sets the wetted materials, so you can match the pump to the fluid.

No Oil Required On The Air Line

The air distribution system is self lubricating and lube free, so there is no oil mist in the exhaust and no need to top up a lubricator.

Compatible With Standard Piping

The 1-1/2 inch BSPT or NPT fluid connections and 1/2 inch BSPT air inlet match common pipe sizes, so the pump fits into existing systems without rework.

Who It Is For

Who Buys This Pump

This pump is chosen when a plant needs a compact, reliable transfer solution for chemicals, oils or abrasive fluids, and wants to keep the weight and footprint low.

Chemical plants transferring acids, alkalis, solvents and additives between storage and process tanks
Machine shops moving cutting fluid, quenching oil and coolant with suspended chips
Pharmaceutical and food processing plants handling shear sensitive liquids where hygiene matters
OEMs integrating a transfer pump into skid mounted systems or filter carts
Maintenance teams needing a portable pump for sump, pit or tank emptying
Facilities replacing a competitor 1-1/2 inch AODD and wanting to keep the same pipework

Problems It Solves

Problems This Pump Is Bought To Fix

Most inquiries for this model come from plants that have a pump failing at one of these five points.

A centrifugal pump loses prime as the tank empties, while this pump self primes and runs dry without damage
Line blockages deadhead the pump, and an AODD simply stops and restarts when the valve opens
Abrasive fluids wear out close clearance pumps, but ball checks pass solids to 6.4 mm
Electric pumps bring area classification issues in solvent or flammable liquid areas, and air drive avoids that
A larger pump at 58.9 kg cannot be moved by two people, but 23.4 kg can

Application Scenarios

Where It Ends Up In A Plant

01

Tanker And Drum Unloading

Self priming with 5.8 m of dry suction lift, so it empties a drum or a small tanker from ground level without a foot valve.

02

Batching And Blending Transfer

Air throttling gives smooth flow control from a trickle to 340.7 LPM, which suits dosing into a mixer or a reactor.

03

Filter Press And Filtration Feed

The pump can be dead headed as the cake builds and the pressure rises, then restart when the press is stripped.

04

Sump And Pit Emptying

One person carries it to the pit, drops the suction hose in and runs it dry at the end without burning anything out.

Technical Features

How The Air End Is Built

The WA Series uses a separate platform from DP3X. Its air end design is not the same.

Stall Free Air Motor
The air motor shifts the major valve positively, so the pump starts under load and does not hang at mid stroke.
Bolted Construction For Leak Free Handling
The fluid section is bolted together, so there are no welded joints that can crack or leak under vibration.
Self Lubricating Lube Free Air System
No lubricator is fitted to the air inlet and none is needed, which removes both a maintenance task and oil mist in the exhaust.
Easy Access To Ball Checks And Fluid Caps
The fluid caps are removable without tools, and the ball checks are accessible from the top, so maintenance is fast.
Selectable Wetted Materials
The center body, fluid caps, manifold, seat, ball check, diaphragm, connection thread and hardware are each set in the model code.
Interchangeable Installation Envelope
Port positions and overall envelope match common brands, so the base, pipe spools and air line usually stay as they are.

Specifications

Published Performance

Transcribed from the performance table Nuodean publishes for this model in the series catalogue.

Maximum flow rate	90GPM(340.7LPM)
Maximum operating pressure	120psi(8.3bar)
Suspended solids max diameter	1/4"(6.4mm)
Fluid inlet	1-1/2"BSPT Or 1-1/2"NPT
Fluid outlet	1-1/2"BSPT Or 1-1/2"NPT
Air inlet	1/2"BSPT(1/2"NPT Available On Request)
Maximum dry suction lift	19feet(5.8m)
Sound level	70psi 60 cycles/min. 80.5db(A)
Weight	WA666150-X-C(aluminum)51.5 lbs(23.4kg); WA666151-X-C(stainless steel)84.5 lbs(38.3kg); WA666152-X-C(Cast Ironl)79.5 lbs(36.1kg)
Model series code	WA66615X-XXX-C, WA66618X-XXX-C, WA666150-X-C

Materials

Material Options

Set in the model code. Ask us if you need a combination the code allows but the sheet does not show.

Wetted body material	Aluminum, cast iron or 316 stainless steel

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.

Quality Control

Before It Is Crated

Every pump is run on air before it leaves, so the shift behaviour is checked rather than assumed
Sound level is published for the model at 70 psi and 60 cycles per minute so you can hold us to it
Ball, seat and diaphragm materials are checked against the ordered model code at assembly
The pump ships with the data sheet and both the fluid section and air section part lists

Customization

What You Can Change

Center body in aluminum, cast iron or 316 stainless steel
Fluid caps and manifold in aluminum, 316 stainless steel or cast iron
Seat in aluminum, 316 stainless steel, PVDF, carbon steel, hard stainless steel, Santoprene, Hytrel or nitrile
Ball check in neoprene, nitrile, Viton, PTFE, EPDM, acetal, polyurethane, stainless steel, Hytrel or Santoprene
Diaphragm in neoprene, nitrile, Viton, PTFE with Santoprene backing, EPDM, acetal, Hytrel or Santoprene
1-1/2 inch BSPT or NPT fluid connections, stainless steel or carbon steel hardware
1/2 inch NPT air inlet in place of the standard 1/2 inch BSPT, on request

Comparison

Against The Alternatives

Where this pump wins and where you should be buying something else.

Versus the 1-1/2 inch plastic pump	The plastic version handles acids and alkalis that would attack aluminum, at 378.5 LPM. Choose plastic when the fluid is corrosive and the flow is the priority.
Versus the 1-1/2 inch DP3X aluminum pump	The DP3X model weighs 29.6 kg and delivers 651 LPM. The WA Series is lighter in aluminum at 23.4 kg, but the DP3X gives more flow. Choose DP3X when volume is the main need.
Versus the 1 inch WA metallic pump	The 1 inch model gives 133 LPM and weighs 8.6 kg. The 1-1/2 inch model gives 340.7 LPM and is heavier. Choose the 1 inch when space or weight is the main constraint.
Versus the 2 inch WA metallic pump	The 2 inch model gives 651 LPM and weighs 29.6 kg. The 1-1/2 inch model gives 340.7 LPM and is lighter. Choose the 2 inch only when 340.7 LPM is not enough.
Versus a centrifugal pump	The centrifugal is cheaper to run at a fixed high flow with clean fluid. This pump wins when the tank runs dry, the line blocks, the fluid carries solids or the area cannot take a motor.
Versus the 1-1/2 inch flap valve pump	The flap valve model passes 50 mm solids, but the WA Series passes only 6.4 mm. Choose the flap valve when solids are larger than 6.4 mm.

Use Guide

Getting The Best Out Of It

Five things that decide whether this pump does 340.7 LPM or half of it.

Give It Real Air
Flow follows air. Use the full 1/2 inch inlet, keep the hose short and confirm the compressor can hold pressure at the flow the pump asks for.
Do Not Throttle The Suction
Throttle the discharge or the air, never the suction. Starving the suction is what causes cavitation, hard running and short diaphragm life.
Match The Elastomer To The Fluid
Diaphragm and ball material is chosen in the model code. Get the chemistry right and the pump lasts. Get it wrong and nothing else you do will save it.
Keep Suction Lift Honest
The published 5.8 m is a dry lift figure. Priming a flooded suction is always easier, so put the pump below the tank where the layout allows.
Stock The Two Repair Kits
One air section kit, WA66615-Air, and one fluid section kit, WA66615-Flu, coded for your diaphragm and ball material. Between them they cover almost every wear part.

Documents

Documents For This Pump

Straight from Nuodean's own literature: series catalogues.

PDF WA Diaphragm Pump Catalogue Series Catalogues PDF 4.0 MB Download

Need a 2D or 3D CAD model of this pump? CAD on request via WhatsApp.

Answers

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

What flow will this pump actually give me?

90 GPM, which is 340.7 LPM, is the maximum with a free discharge and full air supply. Real duty points are lower. Send us the discharge head and the air pressure you can hold and we will tell you where on the curve you land.

Can it run dry?

Yes. An air operated double diaphragm pump can be run dry and can be dead headed against a closed valve without damage. That is the main reason plants choose one over a centrifugal pump.

What is the largest solid it will pass?

1/4 inch, which is 6.4 mm, on the suspended solids figure from the data sheet. If your fluid carries bigger solids, look at the 3 inch models at 9.5 mm or the heavy duty flap valve pump at 50 mm.

Will it replace another brand of 1-1/2 inch AODD pump?

Usually yes. The WA Series pumps are built so that installation dimensions and footprint are compatible with other brands. Send a photo of the nameplate and the pipework and we will confirm before you buy.

Which diaphragm should I order?

PTFE with a Santoprene backing for aggressive solvents and acids, Santoprene for general duty and long flex life, Viton for hot oils and aromatics, nitrile for petroleum products. Tell us the fluid and the temperature and we will put the right code on the quotation.

How loud is it?

80.5 dB(A) at 70 psi and 60 cycles per minute, as printed on the data sheet. Slower cycling is quieter, and a piped exhaust takes more off.

What connections does it come with?

Fluid inlet and outlet are 1-1/2 inch BSPT or 1-1/2 inch NPT. The air inlet is 1/2 inch BSPT female, with 1/2 inch NPT available on request.