Yamada 780106 Cast Center Disk for NDP-20
The Yamada 780106 is a genuine Yamada center disk, Cast Iron, used in NDP-20 series air-operated double diaphragm (AODD) pumps. It clamps the outer bead of the diaphragm to the center rod, transferring the reciprocating motion of the air side to the diaphragm on the wet side. It has to stay flat and true or the diaphragm will flex unevenly and fail early.
Genuine Yamada replacement parts are machined and molded to the original factory tolerances, so fit, alignment and seal engagement match the component being replaced. One or two per pump. Always compare the exact part number against your pump's nameplate before ordering, since Yamada varies internal components by both pump size and body material / elastomer combination.
Key Features
- Genuine Yamada replacement center disk
- Material: Cast Iron
- Fits NDP-20 series AODD pumps
- One or two per pump
- Molded or machined to factory tolerances for correct fit and seal engagement
Applications
- NDP-20 series AODD pump service and rebuilds
- Scheduled preventive maintenance
- Restoring lost flow, leaks, or erratic cycling
- Marine, industrial, chemical and wash-down service
Specifications
- Brand: Yamada
- Manufacturer: Yamada America
- Manufacturer Part Number: 780106
- Part Type: Center Disk
- Material: Cast Iron
- Fits: NDP-20 Series
- Condition: New
Frequently Asked Questions
Q: What causes this kind of structural part to need replacement?
Wear from repeated contact with a moving component, corrosion or chemical attack from the pumped fluid, or physical damage from an impact or overtightened fastener during a previous rebuild.
Q: Is this part likely to wear out again soon after replacement?
Not under normal duty. These are structural components rather than flexing wear items, so a correctly torqued, correctly matched replacement typically lasts for the working life of the surrounding assembly barring abrasive or corrosive service.
Q: How do I confirm this is the correct part for my pump?
Match the part number to your pump's nameplate model and suffix, since Yamada varies this component by both pump size and body material across the model range.
Q: Does this part need to match the pump body material?
Yes. Mixing dissimilar materials in the wetted path can cause galvanic corrosion or chemical incompatibility, so match this part to the body material and elastomer combination already on the pump.
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 center disk.
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