Yamada Air-Operated Double Diaphragm Pumps
Yamada air-operated double diaphragm (AODD) pumps transfer liquids using compressed air and reciprocating diaphragms rather than an electric drive motor mounted on the pump.
Great Lakes Pump & Supply provides Yamada NDP, DP, and G Series pumps for industrial liquid transfer, chemical handling, process circulation, and other compatible fluid-handling applications. Available pump configurations vary by capacity, construction materials, diaphragm compatibility, and installation requirements.
Yamada AOD Pump Products and Accessories
Yamada AODD pumps use a positive-displacement pumping mechanism that can accommodate varying flow requirements and a range of liquid characteristics. Depending on the selected model, configurations may be suitable for chemicals, viscous liquids, suspended solids, or applications requiring self-priming capability.
The Yamada product range includes polypropylene, aluminum, stainless steel, PVDF (Kynar), and other body materials, along with diaphragms manufactured from PTFE, Hytrel, Santoprene, Buna-N, Neoprene, and additional materials.
Pump selection requires evaluating compatibility across all wetted components, not only the diaphragm. Body construction, check balls, seals, liquid temperature, and chemical concentration can affect suitability.
Yamada also offers accessories such as air filter/regulators, pulsation dampeners, pump controllers, dry-run detection equipment, diaphragm monitoring systems, and compatible control components.
Browse Yamada Pump Series
Great Lakes Pump & Supply provides nine Yamada pump-series destinations, ranging from compact chemical-transfer pumps to larger-capacity industrial AODD equipment.
Yamada NDP, DP, and G Series Pumps
NDP-5 Series
The NDP-5 Series provides compact, air-operated diaphragm pumping for lower-volume liquid-transfer applications. Its quarter-inch fluid connections and available construction materials make it an option for smaller industrial dosing, chemical transfer, and equipment-support installations.
Published maximum flow: 3.4 GPM.
DP-10 / DP-15 / G15 Series
These smaller Yamada diaphragm pumps offer different capacities and construction options within the three-eighth-inch and half-inch fluid-connection categories. They support applications requiring compact chemical or process-liquid transfer equipment.
Selection consideration: DP-10, DP-15, and G15 have different capacities and available materials. Verify the specific model rather than selecting solely by connection size.
NDP-15 Series
Yamada NDP-15 pumps provide half-inch fluid connections and multiple construction options for compatible chemical, industrial, and general liquid-transfer applications.
Published maximum flow: 13.5 GPM.
NDP-20 Series
The NDP-20 Series offers three-quarter-inch fluid connections for industrial liquid-transfer requirements exceeding the capacity of smaller diaphragm pumps. Construction materials and diaphragm options vary according to the selected configuration.
Published maximum flow: 31.7 GPM.
NDP-25 / G25 Series
Yamada NDP-25 and G25 pumps provide one-inch fluid connections for moderate-flow industrial pumping applications. The two series have different air-valve designs and available material configurations.
Published maximum flow: Up to 46.2 GPM for the NDP-25 Series.
NDP-32 Series
The NDP-32 features a one-and-one-half-inch suction connection and a one-and-one-quarter-inch discharge connection. This arrangement is intended to simplify replacement of certain existing diaphragm pumps where connection dimensions would otherwise require piping modifications.
Published maximum flow: 50.2 GPM.
NDP-40 Series
Yamada NDP-40 pumps provide one-and-one-half-inch fluid connections and multiple construction options for industrial chemical transfer and general process-liquid handling.
Published maximum flow: 107 GPM.
NDP-50 Series
The NDP-50 Series provides two-inch fluid connections for higher-volume liquid-transfer applications. Multiple body and diaphragm configurations support selection based on the pumped liquid, process conditions, and required flow.
Published maximum flow: 164 GPM.
NDP-80 Series
Yamada NDP-80 pumps provide three-inch fluid connections for larger-volume industrial liquid transfer. Available construction options include aluminum, stainless steel, cast iron, and polypropylene, depending on the specific model.
Published maximum flow: 215 GPM.
Published maximum flow ratings are manufacturer values. Actual operating flow depends on compressed-air supply, discharge pressure, fluid characteristics, and the selected pump configuration.
Selecting a Yamada AODD Pump for Your Application
Choosing a Yamada diaphragm pump begins with the required liquid flow, discharge pressure, available compressed-air supply, fluid viscosity, solids characteristics, and installation arrangement.
Construction materials are particularly important when handling chemicals. Pump bodies, diaphragms, valve balls, seals, and other wetted components must be compatible with the liquid concentration and operating temperature. Available material combinations vary by series.
Air-operated diaphragm pumps can provide self-priming capability and accommodate certain intermittent or variable-flow applications. However, actual suction performance, dry-running suitability, solids passage, and discharge capability depend on the selected model and operating conditions.
Air supply requirements must also be evaluated. The compressed-air system must provide sufficient pressure and airflow at the intended operating point, with appropriate filtration and regulation. Air consumption and compressed-air generation costs should be considered when comparing equipment options.
Pulsation dampeners, monitoring equipment, controllers, and other accessories may be appropriate depending on downstream equipment, liquid characteristics, and process-control requirements.
For replacement equipment, the existing model number, suction and discharge sizes, construction materials, diaphragm type, air connection, flow requirements, and available installation dimensions can help identify a suitable alternative. The NDP-32 may warrant particular consideration when replacing certain pumps with different inlet and outlet sizes.
Great Lakes Pump & Supply can assist with Yamada diaphragm pump selection, replacement equipment, and industrial pump service and repair .
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