Yamada 581000 Air Valve Cap B for NDP-40 to NDP-80
The Yamada 581000 is the genuine replacement air valve cap b specified for NDP-40, NDP-50 and NDP-80 Series pumps. It is part of the air distribution system that gives the pump its cycle.
Air motor parts fail from dirt and from water. Moisture carried in the supply corrodes the machined faces and the springs; scale and pipe debris score the sliding surfaces and lodge under valve faces. The result is a pump that hesitates, stalls at the end of a stroke, cycles unevenly or exhausts continuously without moving product.
Key Features
- Genuine Yamada replacement air valve cap b
- Fits NDP-40, NDP-50 and NDP-80 Series pumps
- One per pump
- Part of the air distribution system that cycles the pump
- Machined to the factory specification for correct valve timing
- Direct replacement, no modification or adjustment required
Applications
- NDP-40, NDP-50 and NDP-80 Series pumps
- Air motor overhauls and rebuild work
- Curing stalling, hesitation or continuous exhaust
- Service after moisture or debris has entered the air supply
- Scheduled preventive maintenance on hard working pumps
- Marine, industrial and transfer duty
Specifications
- Brand: Yamada
- Manufacturer: Yamada America
- Manufacturer Part Number: 581000
- Part Type: Air Valve Cap B
- Fits: NDP-40, NDP-50 and NDP-80 Series pumps
- Quantity Used: One per pump
- Series Port Size: 2 in on the NDP-50 Series
- Condition: New
Frequently Asked Questions
Q: Does the air motor need lubricated air?
These pumps are designed to run on clean dry air without a lubricator. What matters far more is keeping moisture and debris out.
Q: Can I replace one air motor part on its own?
You can, but if the assembly is open it is worth renewing the gaskets, seal rings and springs at the same time. They are inexpensive and reaching them is the expensive part.
Q: Why does the pump exhaust continuously without cycling?
Air is crossing between passages that should be isolated - a failed gasket, a worn seal ring or a valve face that is no longer flat.
Q: Does air pressure affect how long the air motor lasts?
Yes. Running at more pressure than the duty needs increases impact and wear throughout the motor, so set the regulator to the lowest pressure that gives the flow you need.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct air valve cap b.
CLRMarine
