Yamada
Yamada NDP-20BSW — 3/4" Stainless Steel Diaphragm Pump, Ultimate Diaphragm
Yamada NDP-20BSW — 3/4" Stainless Steel Diaphragm Pump, Ultimate Diaphragm
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This NDP-20BSW is a 3/4" NDP-20 air-operated diaphragm pump in stainless steel, rated to 31.7 GPM. It passes solids to 1/16" (2.0 mm) and handles fluid to 212°F (100°C).
316 stainless wetted parts take the aggressive chemicals and elevated-temperature service that aluminum cannot, and clean up for food, beverage and pharmaceutical work. 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.
It runs on plant air with no electrical supply at the pump, self-primes, and will sit stalled against a closed discharge without damage — useful on intermittent or dead-headed duty.
Stocked and shipped from Texas with fast dispatch and competitive pricing. Send over your application details if you want the material selection checked before ordering.
| Brand | Yamada |
|---|---|
| Model / MPN | NDP-20BSW |
| Yamada item no. | 855228 |
| Pump type | Air-operated double-diaphragm (AODD) |
| Series | NDP-20 |
| Port size | 3/4" |
| Maximum flow | 31.7 GPM |
| Air supply pressure | 20-100 PSI |
| Maximum fluid discharge pressure | Same as max air supply (1:1 pump) |
| Maximum solids | 1/16" (2.0 mm) |
| Displacement per cycle | Rubber 0.163 gal (615 cc) / PTFE 0.143 gal (539 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 | Standard |
| Air inlet | 1/4" Female NPT |
| Air exhaust | 3/4" Female NPT |
| Repair kit | K20-MW-1 |
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