Product Overview
The YAMADA NDP-5FPT YS (Part Number: 851306) is a premium air-operated double diaphragm (AODD) pump engineered by YAMADA — a globally recognized Japanese manufacturer renowned for precision fluid handling technology. This pump operates on a reciprocating, positive-displacement principle in which compressed air is alternately directed to two opposing diaphragm chambers via a patented air distribution valve, creating a smooth, pulsation-dampened pumping action. Unlike mechanically driven hydraulic pumps, the NDP-5FPT YS requires no electrical motor, no rotating shaft seals, and no mechanical drive train, making it inherently leak-free, self-priming, and safe for use in explosive or wet environments. The “FPT” designation indicates PTFE (polytetrafluoroethylene) wetted diaphragms and valve seats, while the “YS” suffix denotes Yamada’s specialized specification configuration. With a 1/2-inch port size, this model is ideally suited for precise transfer, dosing, and circulation tasks in demanding industrial fluid systems.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Air-Operated Double Diaphragm Pump (AODD) |
| Model Designation | NDP-5FPT YS / 851306 |
| Manufacturer | YAMADA (Japan) |
| Port Size | 1/2 inch (13 mm) inlet / outlet |
| Max Discharge Pressure | Up to 7 bar (0.7 MPa) air-driven |
| Max Flow Rate | Approx. 30–40 L/min (dependent on air supply and viscosity) |
| Wetted Materials | PTFE diaphragms, PTFE valve seats and balls (FPT specification) |
| Air Supply Pressure | 2–7 bar (recommended operating range) |
| Mounting & Connection | Standard threaded ports (Rc / NPT), foot-mount base |
| Self-Priming | Yes — dry-run capable without damage |
Engineering Features & Advantages
- Precision Performance: The patented Yamada air distribution valve ensures smooth, balanced diaphragm reciprocation with minimal pulsation, delivering consistent and repeatable flow rates for precision dosing and transfer applications.
- Industrial Reliability: Designed for dependable long-term operation in demanding industrial environments, with quality bearings and sealing systems ensuring extended maintenance intervals.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original YAMADA OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
Typical Industrial Applications
With a 1/2-inch port size, this model is ideally suited for precise transfer, dosing, and circulation tasks in demanding industrial fluid systems.
PRODUCT IMAGES
YAMADA NDP-5FPT YS / 851306 Air-Operated Double Diaphragm Pump
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Shop the genuine YAMADA NDP-5FPT YS / 851306 Air-Operated Double Diaphragm Pump. This Japan-made pneumatic hydraulic component features a positive displacement design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.