Yamada
Yamada NDP-25BSW-PP — 1" Stainless Steel Diaphragm Pump, Ultimate Diaphragm
Yamada NDP-25BSW-PP — 1" Stainless Steel Diaphragm Pump, Ultimate Diaphragm
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Yamada builds the NDP-25BSW-PP as a 1" double-diaphragm pump in stainless steel, capable of 46.2 GPM. It passes solids to 1/8" (3 mm) and handles fluid to 212°F (100°C).
316 stainless construction is specified where corrosion resistance and cleanability both matter — dairy, brewing, fine chemicals and pharmaceutical transfer. Yamada's Ultimate two-piece diaphragm pairs a PTFE wetted face with an elastomer backer, giving PTFE chemical resistance with markedly longer flex life than solid PTFE. Ball check valves are the right choice for flooded-suction installations.
The non-metallic center body and glass-filled polypropylene air motor cut weight and remove a corrosion path in wet or chemically aggressive areas. It self-primes, tolerates running dry, and stalls harmlessly against a closed valve, so it suits batching and intermittent transfer where a centrifugal pump would be a poor fit.
Ordered online, shipped from Texas, priced well and backed by US support before and after the sale. Send us your application details if you want a second opinion on materials.
| Brand | Yamada |
|---|---|
| Model / MPN | NDP-25BSW-PP |
| Yamada item no. | 854140-U |
| Pump type | Air-operated double-diaphragm (AODD) |
| Series | NDP-25 |
| Port size | 1" |
| Maximum flow | 46.2 GPM |
| Air supply pressure | 20-100 PSI |
| Maximum fluid discharge pressure | Same as max air supply (1:1 pump) |
| Maximum solids | 1/8" (3 mm) |
| Displacement per cycle | Rubber 0.22 gal (833 cc) |
| Maximum dry suction lift | 18 ft |
| Maximum fluid temperature | 212°F (100°C) |
| Check valve type | Ball valve |
| Body / wetted materials | Stainless Steel (316) |
| Diaphragm material | Ultimate |
| Ball material | Ultimate |
| Air motor | Glass-filled polypropylene (non-metallic center body) |
| Air inlet | 3/8” Female NPT |
| Air exhaust | 3/4” Female NPT |
| Options | Glass-filled polypropylene air motor / non-metallic center body |
| Repair kit | K25-MW-1 |
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