Qingdao Nuodean Pump Co Ltd — air operated double diaphragm pumps since the DP series
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Nuodean pump solution: spare parts and maintenance program
Solution

Maintain Your Installed Fleet Of AODD Pumps With Reliable Spares And Clear Documentation

A pump failure is not just a downtime event. It is a chain reaction: the line stops, the process halts, the shift waits. The fix should not be a search. The right spares should be known, available and matched to the pump's model code.

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Why It Matters

Why Spares Are Not A Guesswork Exercise

Every Nuodean pump model code includes the body material, port size, air inlet size and fluid section configuration. This means the correct repair kit can be identified from the code alone, even if the pump is ten years old. The kit is built to the same specification as the original.

What You Should Get From A Maintenance Program

  • The correct air section and fluid section repair kits are quoted for each pump model in your fleet
  • Exploded drawings and part lists are available for every model, showing every component and its location
  • Critical wear parts like diaphragms, balls and seats are identified and recommended for shelf stock
  • Inspection checklists are provided to guide routine rounds and catch wear before failure
  • The model code is used to confirm kit fit, not the pump's appearance or nameplate condition
Front view of a black industrial double diaphragm pump with red caps and green accents.
Step By Step

How A Maintenance Program Actually Works

Four steps to keep your pumps running without delays.

  1. Identify Each Pump By Model Code

    Problem. Pumps without readable nameplates or with faded labels make it hard to order the right kit.

    How we solve it. Use the model code from the pump body or the original purchase record. The code contains the port size, body material, air inlet size and fluid section configuration. We use this to match the correct repair kit.

  2. Select Kits Based On Model Code And Duty

    Problem. A generic kit may include parts that are not worn, or miss the parts that fail most often.

    How we solve it. We quote the air section kit and fluid section kit separately. Each kit includes only the parts that are replaced during a standard repair, based on the model code and typical wear patterns.

  3. Use Drawings And Part Lists For Assembly

    Problem. Assembling a pump without a guide leads to misalignment, leaks or premature failure.

    How we solve it. Each model has a published exploded drawing and part list. These show the sequence, orientation and fit of every component. Use them during repair to ensure correct assembly.

  4. Inspect And Stock Critical Wear Parts

    Problem. Waiting for a spare to arrive during a shutdown delays the restart.

    How we solve it. We recommend which parts to keep on the shelf based on the pump's duty and fluid. Diaphragms, balls and seats are the most common wear items. Keep one set per pump model in stock.

Pumps Involved

Pumps Most Often Maintained With Spares

Top-down view of a circular metallic component with concentric rings and mounting holes
Spare Parts

Spare Parts And Repair Kits For Diaphragm Pumps

Repair kits and individual parts for DP3X, WA, Specialty, ZG and flap-valve pumps. Model code identifies the kit.

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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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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.

View Specifications →
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.

View Specifications →
Related Guides

Guides Worth Reading First

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

Spare Parts And Maintenance Program FAQ

How do I find the right repair kit if the nameplate is unreadable?

Look at the pump body for the model code. It is stamped on the side of the body, near the air inlet. The code includes the port size, body material and air inlet size. Use that to identify the correct kit.

Are the repair kits for different model codes interchangeable?

No. The air section and fluid section kits are specific to each model code. Even small differences in port size or air inlet thread mean the kit will not fit. Always use the code to confirm fit.

Can I use the same kit for a pump with a different fluid?

The kit is built for the model code, not the fluid. But the wetted materials in the kit must match the fluid. If the fluid is corrosive, use a kit with the correct elastomers for that fluid.

Where can I find the exploded drawing and part list?

The drawings and part lists are published in the Nuodean catalogue and on the product page for each model. They show every component, its part number and its location in the pump.

Do I need to replace all parts in the kit at once?

Not all parts wear at the same rate. Replace only the parts that are damaged or worn. Use the exploded drawing to inspect each component during a routine round.

Get Your Spares Package Quoted

Send the model codes of your pumps. We will quote the air section and fluid section kits, provide the drawings and part lists, and recommend which parts to keep on the shelf.

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