Yamada 15CHST Chrome Steel Check Valve Ball
The Yamada 15CHST is the genuine chrome steel check valve ball for Yamada air operated double diaphragm pumps taking this ball size. Each fluid chamber has an inlet ball and an outlet ball, and they are what make the pump one way: the diaphragm creates suction and pressure, and the balls decide which direction the fluid is allowed to travel.
Material choice matters here as much as anywhere in the pump. A ball has to resist the fluid chemically and resist abrasion mechanically, and it has to have enough mass to drop back onto its seat quickly at high cycle rates. Getting it wrong shows up as a pump that will not hold prime.
Key Features
- Genuine Yamada replacement chrome steel check valve ball
- Material: chrome steel
- Fits Yamada air operated double diaphragm pumps taking this ball size
- 4 per pump - two on the suction side and two on the discharge side
- Restores check valve sealing and suction lift
- Replace balls and valve seats as a matched set
Applications
- Yamada air operated double diaphragm pumps taking this ball size
- Restoring lost flow and slow priming
- Rebuilding a wet end after abrasive service
- Scheduled liquid end overhauls
- Replacing balls worn flat or undersize
- Marine, industrial and chemical transfer duty
Specifications
- Brand: Yamada
- Manufacturer: Yamada America
- Manufacturer Part Number: 15CHST
- Part Type: Chrome Steel Check Valve Ball
- Material: Chrome steel
- Fits: Yamada air operated double diaphragm pumps taking this ball size
- Quantity Used: 4 per pump
- Condition: New
Frequently Asked Questions
Q: How do I tell if a ball is worn?
Roll it on a flat surface and look along the edge. A worn ball wobbles or shows a dull flat band where it has been seating, and it will usually be visibly smaller than a new one when the two are held together.
Q: Do I have to replace the seats as well?
It is strongly advised. The ball and seat bed into each other, so a new ball on an old grooved seat seals against a worn profile and wears quickly to match it.
Q: Why does the pump lose prime overnight?
Usually a leaking suction check ball. With the pump stopped, a ball that no longer seals lets the column of liquid in the suction line drain back, so the pump has to lift dry again from cold.
Q: Can I run a different ball material than the pump was built with?
You can, provided it is compatible with the fluid and rated for the temperature. Weight matters too, since a ball that is too light is slow to reseat at high cycle rates.
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 chrome steel check valve ball.
CLRMarine
