Yamada 771465 Muffler Element for NDP-5 and NDP-15
The Yamada 771465 is the genuine muffler element for NDP-5 and NDP-15 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.
In cold or humid conditions the exhaust can also ice up, since expanding air drops in temperature sharply. A pump that slows down after running for a while in cold weather and recovers after a rest is usually icing rather than wearing out.
Key Features
- Genuine Yamada replacement muffler element
- Fits NDP-5 and NDP-15 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-5 and NDP-15 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: 771465
- Part Type: Muffler Element
- Fits: NDP-5 and NDP-15 Series pumps
- Quantity Used: One per pump
- Series Port Size: 1/2 in on the NDP-15 Series
- Condition: New
Frequently Asked Questions
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.
Q: How often should it be replaced?
Whenever it is visibly dirty or the pump has lost speed for no other reason. On a clean dry air supply it lasts a long time; on a dirty one it can need attention every few months.
Q: There is product in the exhaust. What does that mean?
A diaphragm has split and the pump has been venting product into the air side. Replace the diaphragms and check the air motor internals, not just the muffler.
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.
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 element.
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