Yamada NDP-25BAN 1 in Aluminum AODD Pump, Buna-N Diaphragms
The Yamada NDP-25BAN is a genuine Yamada NDP-25 series air-operated double diaphragm (AODD) pump, built with an aluminum pump body and Buna-N (NBR) diaphragms and valve balls. It uses compressed shop air, not electricity, to reciprocate a pair of diaphragms that alternately draw fluid in on one side of the pump and push it out the other, which lets it run dry without damage, self-prime from a lift, and pass moderate solids without stalling.
With a 1 in port and up to 46.2 GPM, this pump is sized for medium-to-heavy duty transfer, dosing and wash-down work. As with any AODD pump, never run it against a fully closed discharge valve for an extended period, and keep the air supply filtered and regulated to protect the air valve.
Key Features
- Genuine Yamada air-operated double diaphragm (AODD) pump
- NDP-25 series, 1 in ports, up to 46.2 GPM
- Aluminum pump body construction
- Buna-N (NBR) diaphragms and check valve balls
- Self-priming, can run dry without damage, and stalls safely against a closed valve
Applications
- Fluid transfer, dosing and metering duty
- Marine, industrial, chemical and wash-down service
- Portable or fixed installation on tanks, totes or drums
- Solvent, chemical and general liquid transfer
Specifications
- Brand: Yamada
- Manufacturer: Yamada America
- Model / Manufacturer Part Number: NDP-25BAN
- Pump Type: Air-operated double diaphragm (AODD)
- Series: NDP-25
- Port Size: 1 in
- Maximum Flow: 46.2 GPM
- Maximum Air Inlet Pressure: 100 psi
- Body Material: Aluminum
- Diaphragm / Valve Ball Material: Buna-N (NBR)
- Condition: New
Frequently Asked Questions
Q: Can this pump run dry?
Briefly, yes, since it is self-priming, but running dry for an extended period accelerates wear on the diaphragms and check valves. Avoid prolonged dry running whenever possible.
Q: How often should the diaphragms be replaced?
There is no fixed interval. Diaphragms are a wear item that fail from flex fatigue, chemical attack or dry-running, so replace on a schedule that matches your duty cycle and inspect at the first sign of reduced flow or fluid at the muffler.
Q: Is a filter-regulator required?
Not required, but strongly recommended. A filter-regulator on the air supply keeps moisture and debris out of the air valve, which is the leading cause of erratic cycling and premature air motor wear.
Q: Can I convert it to a different diaphragm material later?
In most cases yes, with the matching repair kit for that elastomer, provided the wetted-parts material of the kit is compatible with the pump body material.
Not sure this is the right part? Send us a picture of your Pump Plate to https://www.clrmarine.com/Contact-Us and the CLR Marine team will confirm the correct pump.
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