Yamada 682515 Muffler for NDP-20 to NDP-40
The Yamada 682515 is the genuine muffler for NDP-20, NDP-25 and NDP-40 Series pumps. The pump exhausts its spent air on every stroke, and this is the part that handles that exhaust - taking the sharp edge off the noise without choking the flow the pump needs to breathe.
What clogs it tells you something. Oil and dirt mean the air supply needs filtering; pumped product in the exhaust means a diaphragm has split and the air motor has been passing product for a while, in which case the muffler is the least of the problems and the pump needs opening up.
Key Features
- Genuine Yamada replacement muffler
- Fits NDP-20, NDP-25 and NDP-40 Series pumps
- One per pump
- Reduces exhaust noise without choking air flow
- Restores lost flow caused by exhaust back pressure
- Direct replacement, no modification required
Applications
- NDP-20, NDP-25 and NDP-40 Series pumps
- Restoring performance lost to a clogged exhaust
- Routine air motor service
- Noise reduction in enclosed engine rooms and plant rooms
- Service after a diaphragm failure vented product into the air side
- Marine, industrial and transfer duty
Specifications
- Brand: Yamada
- Manufacturer: Yamada America
- Manufacturer Part Number: 682515
- Part Type: Muffler
- Fits: NDP-20, NDP-25 and NDP-40 Series pumps
- Quantity Used: One per pump
- Series Port Size: 1 in on the NDP-25 Series
- Condition: New
Frequently Asked Questions
Q: Can I run the pump without a muffler?
It will run, and it will be extremely loud. It also leaves the exhaust port open to whatever is in the surrounding air, which then gets drawn back into the motor.
Q: Why does the pump slow down in cold weather?
Expanding exhaust air cools sharply and can ice up the exhaust. A pump that recovers after standing is usually icing rather than failing.
Q: Can the exhaust be piped away?
Yes, and it is common practice where fumes or noise matter. Keep the pipe generously sized and as short as practical, because a long or narrow run creates the same back pressure as a blocked element.
Q: Can a blocked muffler really reduce flow?
Yes, and noticeably. Exhaust back pressure works against the air motor on every stroke, so the pump runs slower and uses more air for less output.
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 muffler.
CLRMarine
