NDP-500 series
The highest-flowing 2" pump on the market!
NDP-500 series has a nominal diameter of 2" (50 mm) and a maximum flow rate of approximately 780 L/min. The maximum size solid is 8 mm or less.
■ Key features
・ Unparalleled Flow Rate: Highest-flowing 2" diaphragm pump available.
・ Superior Efficiency: Drastically reduces operation costs.
・ Simplified Maintenance: Easy to maintain with a universal fastener and square flanges.
・ Proven Technology: Utilizes reliable components for long-lasting performance.
■ 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-50).
■ 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
| Body Material | S: Stainless Steel (SCS14) |
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| Diaphragm Material | |||
| C: Neoprene (CR) |
NDP-500BSC (855371) |
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| N: Buna N (NBR) |
NDP-500BSN (855372) |
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| E: EPDM | NDP-500BSE (855373) |
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| V: Viton(R) (FKM) |
NDP-500BSV (855374) |
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| T: PTFE (PTFE) |
NDP-500BST (855375) |
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| H: Hytrel(R) (TPEE) |
NDP-500BSH (855376) |
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| S: Santoprene(R) (TPO) |
NDP-500BSS (855377) |
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| H/T: Hytrel(R) (TPEE) |
NDP-500BSH/T (855378) |
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| W: PTFE+EPDM | NDP-500BSW (855379) |
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| Wetted Parts Material | |||
| Ball Valve |
NDP-500BSH/T, NDP-500BSW: PTFE Others: Same as the diaphragm material |
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| Valve Seat |
NDP-500BST, NDP-500BSW: 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 | 2"（50 mm） | ||
| Material Connection | Suction Port | JIS flange 10K 50A 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 ※1 | ||
| Maximum Discharge Pressure | 0.7 MPa | ||
| Water Discharge/Cycle |
NDP-500BST: 2400 mL ※2 NDP-500BSW: 2000 mL ※2 |
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| Maximum Flow Rate |
NDP-500BST: 680 L/min ※3 |
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| Maximum Air Consumption |
NDP-500BST： 6900 L/min（ANR） |
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| Maximum Size Solid | Maximum 8 mm | ||
| viscosity limit | Self-priming | Maximum 3 Pa·s | |
| push | Maximum 8 Pa·s | ||
| Suction Head Lift |
NDP-500BST: 3m Others: 5m |
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| Net Weight |
NDP-500BST: 57.8 kg NDP-500BSW: 57.4 kg |
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※1 The maximum supply air pressure for a type with a resin-made pump body will depend on the liquid temperature.
※2 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.
※3 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
◆ Performance Curve
◆ Dimensional Drawings
◆ CAD Data
Parts List
| Body Material | S: Stainless Steel （SCS14） |
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| Diaphragm Material | |||||||
| C: Neoprene（CR） | NDP-500BSC （855371） |
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| N: Buna N（NBR） | NDP-500BSN （855372） |
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| E: EPDM | NDP-500BSE （855373） |
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| V: Viton(R)（FKM） | NDP-500BSV （855374） |
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| T: PTFE | NDP-500BST （855375） |
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| H: Hytrel(R)（TPEE） | NDP-500BSH （855376） |
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| S: Santoprene(R)（TPO） | NDP-500BSS （855377） |
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| H/T: Hytrel(R)（TPEE） | NDP-500BSH/T （855378） |
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| W: PTFE+EPDM | NDP-500BSW （855379） |
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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.