NDP-20BSN
Air-operated double-diaphragm pump
- Fluid section
- Stainless steel (SCS14)
- Diaphragm
- Nitrile rubber (NBR)
- Ball / check valve
- Nitrile rubber (NBR)
- Fluid connections
- Rc 3/4
- Maximum catalog flow
- 110 L/min
- Seat material
- Stainless steel (SCS14)
Product photographs supplied by DENGFENG and matched by the supplied model filenames. Confirm the exact material configuration and nameplate with the quotation.
YAMADA / Pneumatic & Diaphragm Pumps
YAMADA
NDP-20BAN
NDP-20BAN is a 3/4-inch air-operated double-diaphragm pump with aluminum alloy (adc12) wetted sections and Nitrile rubber (NBR) diaphragms and ball valves. Its Japanese catalog configuration is rated up to 110 L/min. Compare materials, connection threads and the required operating duty before selecting a replacement.
Model: NDP-20BAN
Include quantity, destination, required condition and delivery date. Pricing and availability are confirmed individually.
Choose by configuration
What defines this model
- Fluid section
- Aluminum alloy (ADC12)
- Diaphragm
- Nitrile rubber (NBR)
- Ball / check valve
- Nitrile rubber (NBR)
- Fluid connections
- Rc 3/4Japanese catalog configuration. Confirm the supplied market version and thread standard; Rc and NPT are not interchangeable specifications.
- Maximum catalog flow
- 110 L/minCatalog maximum, not the flow at every duty point. Select using the pressure/flow curve with capacity margin.
- Seat material
- Stainless steel (SCS14)
Compare nearby models
Closest listed configurations in YAMADA NDP-20. These are comparison references; interchangeability has not been established.
Highlighted rows differ. On small screens, scroll the table sideways.
| Selection factor | This modelNDP-20BAN | NDP-20BSN | NDP-20BPN | NDP-20BAC |
|---|---|---|---|---|
| Fluid section | Aluminum alloy (ADC12) | Stainless steel (SCS14) | Glass-fibre-reinforced polypropylene (PP-GF) | Aluminum alloy (ADC12) |
| Diaphragm | Nitrile rubber (NBR) | Nitrile rubber (NBR) | Nitrile rubber (NBR) | Chloroprene rubber (CR) |
| Ball / check valve | Nitrile rubber (NBR) | Nitrile rubber (NBR) | Nitrile rubber (NBR) | Chloroprene rubber (CR) |
| Fluid connections | Rc 3/4Japanese catalog configuration. Confirm the supplied market version and thread standard; Rc and NPT are not interchangeable specifications. | Rc 3/4Japanese catalog configuration. Confirm the supplied market version and thread standard; Rc and NPT are not interchangeable specifications. | Rc 3/4Japanese catalog configuration. Confirm the supplied market version and thread standard; Rc and NPT are not interchangeable specifications. | Rc 3/4Japanese catalog configuration. Confirm the supplied market version and thread standard; Rc and NPT are not interchangeable specifications. |
| Maximum catalog flow | 110 L/minCatalog maximum, not the flow at every duty point. Select using the pressure/flow curve with capacity margin. | 110 L/minCatalog maximum, not the flow at every duty point. Select using the pressure/flow curve with capacity margin. | 110 L/minCatalog maximum, not the flow at every duty point. Select using the pressure/flow curve with capacity margin. | 110 L/minCatalog maximum, not the flow at every duty point. Select using the pressure/flow curve with capacity margin. |
| Seat material | Stainless steel (SCS14) | Stainless steel (SCS14) | PP-GF | Stainless steel (SCS14) |
No verified differences are recorded for these comparison fields. Confirm the full nameplate and suffixes before choosing a replacement.
How to check the fit
Match all wetted materials
Check the fluid, concentration, temperature and solids against the fluid section, diaphragm and ball/check-valve materials. Matching port size alone does not establish chemical compatibility.
Match connections and operating duty
Confirm the thread or flange standard, required flow at discharge pressure, air supply and suction conditions. Maximum catalog flow is not the delivered flow at every operating point.
Product information
Model & Configuration
Manufacturer catalog and model-code reference. Confirm the supplied unit against its nameplate and the applicable manual.
| Brand | YAMADA |
|---|---|
| Model number | NDP-20BAN |
| Product Type | Air-operated double-diaphragm pump |
| Series | NDP-20 |
| Japanese Product Code | 851317 |
| Nominal Port Size | 3/4 in (20 mm) |
| Fluid Inlet / Outlet | Rc 3/4Japanese catalog configuration. Confirm the supplied market version and thread standard; Rc and NPT are not interchangeable specifications. |
| Air Supply Port | Rc 1/4 |
| Fluid Section Material | Aluminum alloy (ADC12) |
| Diaphragm Material | Nitrile rubber (NBR) |
| Ball Valve Material | Nitrile rubber (NBR) |
| Seat Material | Stainless steel (SCS14) |
| Air Supply Pressure | 0.2–0.7 MPa |
| Maximum Discharge Pressure | 0.7 MPa |
| Maximum Flow Rate | 110 L/minCatalog maximum, not the flow at every duty point. Select using the pressure/flow curve with capacity margin. |
| Discharge Volume Per Cycle | 350 mLApproximate; depends on fluid, piping and operating conditions. |
| Maximum Air Consumption | 1200 L/min (ANR) |
| Maximum Solids | 2 mm |
| Weight | 9.0 kg |
| Dry Suction Lift | 3 m |
Selection & Installation
- NDP-20BAN: match the Aluminum alloy (ADC12) fluid section and Nitrile rubber (NBR) diaphragm/ball combination to the liquid, concentration and temperature.
- The Japanese product code 851317 specifies Rc 3/4 liquid ports and Rc 1/4 air supply. Confirm the nameplate and regional connection version before ordering.
- Use the model performance curve to check required flow at discharge pressure. The catalog maximum is 110 L/min; allow capacity margin rather than selecting only by this maximum.
- Confirm suction lift, viscosity, solids and available compressed-air capacity. Request installation dimensions and current unit photographs with the quotation.
- Aluminum NDP-20 models can look alike. BAC uses CR, BAN uses NBR, BAV uses FKM and BAT uses PTFE; appearance alone does not identify the diaphragm material.
Manufacturer documentation
- YAMADA NDP-20BAN specifications, dimensions and performance curve (Japan) ↗
- YAMADA NDP-20 material and model selection table ↗
Reference information reviewed September 2026. Check the applicable revision for your equipment.
More in Pneumatic & Diaphragm Pumps
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NDP-20BPN
Air-operated double-diaphragm pump
- Fluid section
- Glass-fibre-reinforced polypropylene (PP-GF)
- Diaphragm
- Nitrile rubber (NBR)
- Ball / check valve
- Nitrile rubber (NBR)
- Fluid connections
- Rc 3/4
- Maximum catalog flow
- 110 L/min
- Seat material
- PP-GF
NDP-20BAC
Air-operated double-diaphragm pump
- Fluid section
- Aluminum alloy (ADC12)
- Diaphragm
- Chloroprene rubber (CR)
- Ball / check valve
- Chloroprene rubber (CR)
- Fluid connections
- Rc 3/4
- Maximum catalog flow
- 110 L/min
- Seat material
- Stainless steel (SCS14)