NDP-20 series
Compact and High Water Discharge!
Safe Design with Intrinsically Explosion-proof Specification. An air-powered diaphragm pump that can transport highly flammable liquids at high pressure. Fully self-suction type that can pump out fluid efficiently, with no pump-priming required. This series of diaphragm pumps are suitable for slurry without the risk of leakage due to seal friction.
■ Main Applications
Collection of Waste Liquid/Sludge/Supply of Paint To Roll Coater/Collection of Cutting Oil/Application of Adhesives/Application of Mold Release Agent/Mold Coating Material
Features
■ 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 | A: Aluminum (ADC12) |
S: Stainless Steel （SCS14） |
P: GF Polypropylene （PP-GF） |
P: GF Polypropylene （PP-GF） |
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| Diaphragm Material | |||||
| C: Neoprene (CR) |
NDP-20BAC (851316) |
NDP-20BSC (851321) |
NDP-20BPC (851663) |
NDP-20BPC-FL (853819) |
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| N: Buna N (NBR) (NBR) |
NDP-20BAN (851317) |
NDP-20BSN (851322) |
NDP-20BPN (852596) |
NDP-20BPN-FL (853820) |
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| E: EPDM(EPDM) | NDP-20BAE (851318) |
NDP-20BSE (851323) |
NDP-20BPE (852407) |
NDP-20BPE-FL (853821) |
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| V: Viton(R) (FKM) |
NDP-20BAV (851319) |
NDP-20BSV (851324) |
NDP-20BPV (852597) |
NDP-20BPV-FL (853822) |
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| T: PTFE |
NDP-20BAT (851320) |
NDP-20BST (851325) |
NDP-20BPT (851664) |
NDP-20BPT-FL (853823) |
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| H: Hytrel(R) (TPEE) |
NDP-20BAH (851729) |
NDP-20BSH (851730) |
NDP-20BPH (851734) |
NDP-20BPH-FL (853824) |
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| S: Santoprene(R) (TPO) |
NDP-20BAS (852690) |
NDP-20BSS (852691) |
NDP-20BPS (852692) |
NDP-20BPS-FL (853825) |
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| H/T: Hytrel(R) (TPEE) |
NDP-20BAH/T (851875) |
NDP-20BSH/T (851876) |
NDP-20BPH/T (851877) |
NDP-20BPH/T-FL (853826) |
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| Wetted Parts Material | |||||
| Ball Valve | NDP-20B〇H/T: PTFE Others: Same as the diaphragm material | ||||
| Valve Seat | SMS1025 | SUS316 | PP-GF | PP-GF | |
| Valve Stopper | ADC12 | SCS14 | PP-GF | PP-GF | |
| Center Disk | NDP-20BAT: A5056 Others: SUS316 |
SUS316 | PP-GF SUS13 (Insert material) |
PP-GF SUS13 (Insert material) |
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| Specifications | |||||
| Nominal Diameter | 3/4"(20 mm) | ||||
| Material Connection |
Suction Port | Rc 3/4 | JIS flange 10K 20A equivalent |
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| Discharge Port | Rc 3/4 | JIS flange 10K 20A equivalent |
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| Air Connection |
Supply Port | Rc 1/4 (W/air valve) | |||
| Exhaust Port | Rc 3/4 (W/silencer) | ||||
| Air Supply Pressure | 0.2~0.7 Mpa *1 | ||||
| Maximum Discharge Pressure | 0.7MPa | ||||
| Water Discharge/Cycle |
Fluorine resin diaphragm: 240 mL *2 Other diaphragm: 350 mL *2 |
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| Maximum Flow Rate |
Fluorine resin diaphragm: 100 L/min *3 Other diaphragm: 110 L/min *3 |
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| Maximum Air Consumption | Fluorine resin diaphragm: 1400 L/min (ANR) Other diaphragm: 1200 L/min (ANR) | ||||
| Maximum Size Solid | Maximum 2 mm | ||||
| Suction Head Lift | NDP-20B○T: 1.5 m Others: 3 m | ||||
| Net Weight | 9.0 kg | 14.0 kg | 8.0 kg | 8.0 kg | |
*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
◆ Parts List
◆ CAD Data
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 1/4" inner diameter.
*Prepare the connection materials separately according to the usage conditions.
*Use the dedicated bracket and air hose when attaching to the pump.