NDP-20BAT
Air-operated double-diaphragm pump
- Fluid section
- Aluminum alloy (ADC12)
- Diaphragm
- PTFE
- Ball / check valve
- PTFE
- Fluid connections
- Rc 3/4
- Maximum catalog flow
- 100 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-20BPT
NDP-20BPT is a 3/4-inch air-operated double-diaphragm pump with glass-fibre-reinforced polypropylene (pp-gf) wetted sections and PTFE diaphragms and ball valves. Its Japanese catalog configuration is rated up to 100 L/min. Compare materials, connection threads and the required operating duty before selecting a replacement.
Model: NDP-20BPT
Include quantity, destination, required condition and delivery date. Pricing and availability are confirmed individually.
Choose by configuration
What defines this model
- Fluid section
- Glass-fibre-reinforced polypropylene (PP-GF)
- Diaphragm
- PTFE
- Ball / check valve
- PTFE
- 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
- 100 L/minCatalog maximum, not the flow at every duty point. Select using the pressure/flow curve with capacity margin.
- Seat material
- PP-GF
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-20BPT | NDP-20BAT | NDP-20BST | NDP-20BPN |
|---|---|---|---|---|
| Fluid section | Glass-fibre-reinforced polypropylene (PP-GF) | Aluminum alloy (ADC12) | Stainless steel (SCS14) | Glass-fibre-reinforced polypropylene (PP-GF) |
| Diaphragm | PTFE | PTFE | PTFE | Nitrile rubber (NBR) |
| Ball / check valve | PTFE | PTFE | PTFE | 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. | 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 | 100 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. | 100 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 | PP-GF | Stainless steel (SCS14) | Stainless steel (SCS14) | PP-GF |
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-20BPT |
| Product Type | Air-operated double-diaphragm pump |
| Series | NDP-20 |
| Japanese Product Code | 851664 |
| 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 | Glass-fibre-reinforced polypropylene (PP-GF) |
| Diaphragm Material | PTFE |
| Ball Valve Material | PTFE |
| Seat Material | PP-GF |
| Air Supply Pressure | 0.2–0.7 MPaMaximum permissible pressure depends on liquid temperature. Check the temperature-pressure chart in the model data sheet. |
| Maximum Discharge Pressure | 0.7 MPa |
| Maximum Flow Rate | 100 L/minCatalog maximum, not the flow at every duty point. Select using the pressure/flow curve with capacity margin. |
| Discharge Volume Per Cycle | 240 mLApproximate; depends on fluid, piping and operating conditions. |
| Maximum Air Consumption | 1400 L/min (ANR) |
| Maximum Solids | 2 mm |
| Weight | 8.0 kg |
| Dry Suction Lift | 1.5 m |
Selection & Installation
- NDP-20BPT: match the Glass-fibre-reinforced polypropylene (PP-GF) fluid section and PTFE diaphragm/ball combination to the liquid, concentration and temperature.
- The Japanese product code 851664 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 100 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.
- For the PP-GF body, check the liquid temperature-pressure chart. Chemical compatibility must include diaphragms, balls and seats as well as the body.
Manufacturer documentation
- YAMADA NDP-20BPT 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-20BST
Air-operated double-diaphragm pump
- Fluid section
- Stainless steel (SCS14)
- Diaphragm
- PTFE
- Ball / check valve
- PTFE
- Fluid connections
- Rc 3/4
- Maximum catalog flow
- 100 L/min
- Seat material
- Stainless steel (SCS14)
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