Product photographs supplied by DENGFENG and matched by the supplied model filenames. Confirm the exact material configuration and nameplate with the quotation.
NDP-20BAV is a 3/4-inch air-operated double-diaphragm pump with aluminum alloy (adc12) wetted sections and Fluoroelastomer (FKM) 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.
Include quantity, destination, required condition and delivery date. Pricing and availability are confirmed individually.
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-20BAV | NDP-20BAC | NDP-20BAN | NDP-20BAT |
|---|---|---|---|---|
| Fluid section | Aluminum alloy (ADC12) | Aluminum alloy (ADC12) | Aluminum alloy (ADC12) | Aluminum alloy (ADC12) |
| Diaphragm | Fluoroelastomer (FKM) | Chloroprene rubber (CR) | Nitrile rubber (NBR) | PTFE |
| Ball / check valve | Fluoroelastomer (FKM) | Chloroprene rubber (CR) | Nitrile rubber (NBR) | PTFE |
| 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. | 100 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) | Stainless steel (SCS14) | Stainless steel (SCS14) |
No verified differences are recorded for these comparison fields. Confirm the full nameplate and suffixes before choosing a replacement.
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.
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.
Manufacturer catalog and model-code reference. Confirm the supplied unit against its nameplate and the applicable manual.
| Brand | YAMADA |
|---|---|
| Model number | NDP-20BAV |
| Product Type | Air-operated double-diaphragm pump |
| Series | NDP-20 |
| Japanese Product Code | 851319 |
| 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 | Fluoroelastomer (FKM) |
| Ball Valve Material | Fluoroelastomer (FKM) |
| 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 |
Reference information reviewed September 2026. Check the applicable revision for your equipment.
Air-operated double-diaphragm pump
Air-operated double-diaphragm pump
Air-operated double-diaphragm pump
Send us the full model number or a photo of your nameplate.
