DP3X Series

DP3X Series Air Operated Double Diaphragm Pumps

DP3X is the generation Nuodean builds today. It keeps what worked in the earlier DP pumps and rebuilds the part that decides whether an AODD pump is worth owning, the air distribution system.

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Models

Fifteen Models In One Platform

Four port sizes and four body materials. The hydraulic end is shared inside a size, so the choice is chemistry, weight and price rather than performance.

Front view of a black industrial double diaphragm pump with red ports on a white background

DP3X Series

1 Inch Aluminum Air Operated Double Diaphragm Pump

133 LPM and 8.3 bar from an 8.6 kg aluminum body. The compact workhorse of the DP3X range.

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Front view of a stainless steel pneumatic double diaphragm pump with green diaphragm rings and red port caps.

DP3X Series

1 Inch Stainless Steel Air Operated Double Diaphragm Pump

133 LPM and 8.3 bar from a 16.3 kg stainless steel body. The corrosion resistant workhorse of the DP3X range.

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Front view of a black industrial double diaphragm pump with green trim and red port caps

DP3X Series

1 Inch Cast Iron Air Operated Double Diaphragm Pump

133 LPM and 8.3 bar from a 14.1 kg cast iron body. The durable workhorse of the DP3X range.

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Front view of a gray industrial double diaphragm pump with flanged ports and a black center block.

DP3X Series

1 Inch Non Metallic Air Operated Double Diaphragm Pump

177.9 LPM and 8.3 bar from a 9.2 kg non metallic body. The entry point for corrosion resistance in the DP3X range.

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Front view of an industrial double diaphragm pump with black manifold and silver chambers.

DP3X Series

1-1/2 Inch Aluminum Air Operated Double Diaphragm Pump

340.7 LPM and 8.3 bar from a 23.4 kg aluminum body. The mid-range volume pump in the DP3X series.

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Front view of a stainless steel industrial double diaphragm pump with red caps on a white background.

DP3X Series

1-1/2 Inch Stainless Steel Air Operated Double Diaphragm Pump

340.7 LPM and 8.3 bar from a 38.3 kg stainless steel body. The durable workhorse of the DP3X range.

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3D render of a black industrial diaphragm pump with red port and mounting feet

DP3X Series

1-1/2 Inch Cast Iron Air Operated Double Diaphragm Pump

340.7 LPM and 8.3 bar from a 36.1 kg cast iron body. The rugged workhorse of the DP3X range.

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Front view of a gray industrial double diaphragm pump with flanged connections and a central air valve.

DP3X Series

1-1/2 Inch Non Metallic Air Operated Double Diaphragm Pump

378.5 LPM and 8.3 bar from a 28.1 kg non metallic body. The chemical duty workhorse of the DP3X range.

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Front view of a black industrial double diaphragm pump with red caps and green accents.

DP3X Series

2 Inch Aluminum Air Operated Double Diaphragm Pump

651 LPM and 8.3 bar from a 29.6 kg aluminum body. The volume workhorse of the DP3X range.

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A silver metallic industrial double diaphragm pump with red caps and a central black manifold.

DP3X Series

2 Inch Stainless Steel Air Operated Double Diaphragm Pump

651 LPM and 8.3 bar from a 56.9 kg stainless steel body. The corrosion resistant workhorse of the DP3X range.

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Front view of a symmetrical industrial double diaphragm pump with a black manifold and a central gold filter.

DP3X Series

2 Inch Cast Iron Air Operated Double Diaphragm Pump

651 LPM and 8.3 bar from a 56.4 kg cast iron body. The heavy duty workhorse of the DP3X range.

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DP3X Series

2 Inch Non Metallic Air Operated Double Diaphragm Pump

548.8 LPM from a 28.1 kg non metallic body. The chemical duty workhorse of the DP3X range.

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Front view of a pneumatic double diaphragm pump with black manifolds and silver diaphragm chambers

DP3X Series

3 Inch Aluminum Air Operated Double Diaphragm Pump

897 LPM and 8.3 bar from a 49.8 kg aluminum body. The largest volume pump in the DP3X range.

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A black industrial diaphragm pump with green accents and a red port cover on a white background.

DP3X Series

3 Inch Cast Iron Air Operated Double Diaphragm Pump

897 LPM and 8.3 bar from a 96.7 kg cast iron body. The heavy duty volume pump in the DP3X range.

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Silver metallic double diaphragm pump with green gaskets and a red center cap.

DP3X Series

3 Inch Stainless Steel Air Operated Double Diaphragm Pump

897 LPM and 8.3 bar from a 100.79 kg stainless body. The high volume workhorse of the DP3X range.

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By Port Size

Start From The Port Size

Pick the size that matches your line, then choose the body material that survives your fluid.

1" DP3X Diaphragm Pumps

The smallest DP3X port size. Four body materials. Flow to 178 LPM, dry lift to 6.1 m.

1-1/2" DP3X Diaphragm Pumps

The middle ground in the DP3X series. Four body materials, 90 to 100 GPM, 6.4 mm solids, compatible with other brands.

2" DP3X Diaphragm Pumps

Four body materials, 651 LPM flow, 120 psi pressure, 6.4 mm solids. Compatible with other brands.

3" DP3X Diaphragm Pumps

The largest DP3X size. Three models in aluminum, cast iron and stainless steel, all rated for 897 LPM and 9.5 mm solids.

Who It Is For

Who Specifies DP3X

Plants that have already been let down by a pump that stalled, iced up, lost prime or could not be replaced without cutting pipework.

Chemical processing plants moving acids, alkalis and solvents where a seal failure is a safety event
Paint, ink and coatings makers who need shear gentle transfer into filling and batching lines
Metalworking and machine shops circulating cutting fluid and quenching oil that carry chips
Waste water and filtration operators feeding filter presses and dosing systems
Electroplating and surface finishing lines pumping plating chemistry that eats metal pumps
OEM builders who need a pump platform with published drawings and a stable model code

Metalworking And Machine Tools Paints Inks And Coatings Chemical Processing Food And Pharmaceutical

Problems Solved

What The DP3X Air End Was Redesigned To Fix

Every improvement in this generation answers a complaint that plants had about the previous one, or about somebody else's pump.

Stall out at mid stroke, fixed by a pilot air valve that gives the major valve a positive and faster shift signal
Ice on the air end and a screaming exhaust, fixed by an anti icing design with a built in vacuum chamber
Oil mist in the exhaust and an oiler to keep filled, removed by a self lubricating lube free air system
Air valve wear from a dirty compressed air supply, answered with dual ceramic dynamic seals on both valves
Heavy pulsation in the discharge line, reduced by faster trip over between strokes
Replacement pumps that do not fit the old base, avoided by keeping installation dimensions compatible with other brands

Core Advantages

Four Things That Define The Generation

Two Valve Air Distribution

A major air valve driven by a pilot air valve. The pilot is shifted mechanically by the actuator pin and pneumatically by supply air, so the changeover is decisive at every stroke instead of drifting.

Ceramic Seals On Both Valves

Dual ceramic dynamic seals resist wear, tolerate an imperfect air supply and keep the pump shifting cleanly through a long service life.

Lower Air Consumption

The anti icing design lowers discharge air pressure, which cuts the energy thrown away as cold exhaust and reduces the noise that comes with it.

Drop In Dimensions

Footprint, port positions and mounting are compatible with other brands, so a DP3X pump can replace an existing pump without changing the installation.

Range Data

Range Performance

The envelope across all fifteen DP3X 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	4.6 m to 8.3 m depending on model
Body materials	Aluminum, cast iron, 316 stainless steel, polypropylene and PVDF
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 DP3X Duties

Bulk And Tanker Transfer

Self priming with a long dry lift, so road tankers, IBCs and drum banks are emptied from ground level.

Filling And Packaging Feed

Air throttled flow control feeds filling heads smoothly without shearing emulsions or breaking pigment.

Filtration And Press Feed

Pressure rises as the cake builds, the pump slows and eventually dead heads, then restarts when the press is stripped.

Recirculation And Clean Down

System flush and reclamation duty where the pump has to run dry at the end of every cycle.

Guides For The DP3X Range

Working Principle

How An Air Operated Double Diaphragm Pump Works

Follow one full stroke through the pilot valve, the major air valve and both liquid chambers, and the rest of the pump stops being mysterious.

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

Aluminum Cast Iron Stainless Steel or Polypropylene Pump Body

Compare aluminum, cast iron, stainless steel and non metallic bodies by fluid, duty and weight, not by habit.

Answers

DP3X Series AODD Pumps FAQ

How is DP3X different from the older DP11 series?

DP3X inherits the DP platform and improves the air distribution system. Where a DP11 pump is already installed, the drawings and part lists for it are still on our download page and the replacement kits are still catalogued.

How do I read a DP3X model code?

Reading left to right the code sets the series and pump size, then center body material, fluid caps and manifold material, seat material, ball check material, diaphragm material, fluid connection type and hardware. Every data sheet on this site prints the full table.

Which DP3X size do I need?

Start from the flow you need at your discharge head, then check the solids size. 1 inch reaches 133 LPM, 1-1/2 inch reaches 341 LPM, 2 inch reaches 651 LPM and 3 inch reaches 897 LPM.

Are the 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 DP3X 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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