NDP-800 series
AVAILABLE May 25, 2026！
World-Class-Flow - Unmatched Efficiency!
NDP-800BS Series sets a new global benchmark in performance. By re-engineering the internal structure, we have achieved the maximum flow rate of 990 L/min, which is 6.5% higher than the previous NDP-80 series, while maintaining the superior diaphragm longevity and other conventional benefits our customers expect.
NDP-800 series has a nominal diameter of 3" (80 mm) and a maximum flow rate of approximately 990 L/min. The maximum size solid is 10 mm or less.
■ Key features
・ Diaphragm Longevity
・ Reset Button
・ C-Spool Technology
・ Powerful Base
・ All Bolted Design
■ Main Applications
Collection of Waste Liquid/Sludge/Transfer of Factory Wastewater/Transfer of Lubricant and Hydraulic Oil/Cleaning of Crude Oil and Raw Material Tanks/Collection of Rainwater/Wastewater Treatment during Regular Repair/Transfer of Latex/Transfer of Slurry/Mold Release Agent
Features
■ Maximum Discharge Volume
Comparison with existing model (NDP-80).
■ Independent Left and Right Pilot Valves
These activate the air switch valve at the stroke limit, and are also completely oil-free. Dynamic seals are eliminated as independent left and right types.
It is resistant to abrasion and ensures stable pump operation over a long period of time.
■ Yamada’s Proprietary Design Air Switch Valve “C-Spool”
The air switch valve in the center section of the diaphragm pump is completely oil-free, so it does not require regular lubrication.
The operation assist using a C-spring suppresses stoppages during operation, and achieves stable operation.
◆ Air Switch Valve “C-Spool”
| The C-spring Prevents Stoppages during Operation Achieves stable operation. |
Equipped with a Reset Button Downtime due to pump stoppages in the case of wear of the air switch valve is kept to a minimum. |
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| Completely Oil-free Both the air switch valve and the pilot valve that activates the air switch valve at the stroke limit are designed to be oil-free. Does not require regular lubrication. |
Simple Replacement No need to disassemble the pump when replacing it. |
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Specifications
Click on the model number to download the product datasheet (specifications, dimensions, and performance curves).
| Body Material | S: Stainless Steel (SCS14) |
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| Diaphragm Material | |||
| C: Polychloloprene (CR) | NDP-800BSC (855477) |
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| N: Buna N (NBR) | NDP-800BSN (855478) |
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| E: Ethylene Propylene Diene Monomer (EPDM) | NDP-800BSE (855479) |
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| V: Fluorelastomer (FKM) | NDP-800BSV (855480) |
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| T: Polytetrafluoroethylene (PTFE) | NDP-800BST (855481) |
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| H: Thermoplastic Polyester Elastomer (TPEE) | NDP-800BSH (855482) |
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| S: Thermoplastic Olefinic Elastomer (TPO) | NDP-800BSS (855483) |
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| H/T: Thermoplastic Polyester Elastomer (TPEE) | NDP-800BSH/T (855484) |
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| W: Polytetrafluoroethylene + Ethylene Propylene Diene Monomer (PTFE+EPDM) | NDP-800BSW (855485) |
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| Wetted Parts Material | |||
| Ball Valve |
NDP-800BSH/T, NDP-800BSW: PTFE Others: Same as the diaphragm material |
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| Valve Seat |
NDP-800BST, NDP-800BSW: SUS316 Others: Same as the diaphragm material |
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| Valve Stopper | Same as the body material (integrated type) | ||
| Center Disk | SUS316 | ||
| Specifications | |||
| Nominal Diameter | 3"（80 mm） | ||
| Material Connection | Suction Port | JIS flange 10K 80A equivalent | |
| Discharge Port | |||
| Air Connection | Supply Port | Rc 3/4 (W/air valve) | |
| Exhaust Port | Rc 1 (W/silencer) | ||
| Air Supply Pressure | 0.2 - 0.7 MPa | ||
| Maximum Discharge Pressure | 0.7 MPa | ||
| Water Discharge/Cycle |
NDP-800BST: 3500 mL ※1 NDP-800BSW: 4600 mL ※1 |
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| Maximum Flow Rate |
NDP-800BST: 690 L/min ※2 |
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| Maximum Air Consumption |
NDP-800BST: 7000 L/min（ANR） |
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| Maximum Size Solid | Maximum 10 mm | ||
| viscosity limit | Self-priming | Maximum 3 Pa·s | |
| push | Maximum 8 Pa·s | ||
| Suction Head Lift |
NDP-800BST: 2.4 m |
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| Net Weight |
NDP-800BST: 107 kg |
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※1 The water discharge is provided as a rough approximation only. The discharge will differ depending on factors such as the liquid to be transferred and the piping conditions.
※2 Maximum flow rate is a value indicating the pump capacity. We recommend selecting a size that allows some leeway, taking into account the impact on the life span of the diaphragm.
Dimentional drawing
Performance curve
Downloads
Parts List
| Body Material | S: Stainless Steel （SCS14） |
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| Diaphragm Material | ||
| C: Polychloloprene （CR） | NDP-800BSC （855477） |
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| N: Buna N（NBR） | NDP-800BSN （855478） |
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| E: Ethylene Propylene Diene Monomer (EPDM) | NDP-800BSE （855479） |
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| V: Fluorelastomer （FKM） | NDP-800BSV （855480） |
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| T: Polytetrafluoroethylene (PTFE) | NDP-800BST （855481） |
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H: Thermoplastic Polyester Elastomer （TPEE） |
NDP-800BSH （855482） |
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S: Thermoplastic Olefinic Elastomer (TPO) |
NDP-800BSS （855483） |
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H/T: Thermoplastic Polyester Elastomer (TPEE) |
NDP-800BSH/T （855484） |
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W: Polytetrafluoroethylene + Ethylene Propylene Diene Monomer (PTFE+EPDM) |
NDP-800BSW （855485） |
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Accessories
◆ Air Unit
2piece set (Air Filter + Regulator)
Removes moisture and debris from the supply air and protects the pump mechanism.
An air filter and regulator are included in one set depending on the usage conditions.
Yamada diaphragm pumps can be operated without lubrication with two sets of air except under the following conditions.
● DP-10 series, NDP-H series
● For continuous operation of minimum 1 hour
● For use with fluids and environments of minimum 70°C
● 2-piece set has a 3/4" inner diameter.
*Prepare the connection materials separately according to the usage conditions.
*Use the dedicated bracket and air hose when attaching to the pump.