Yamada 630313 Stainless Steel Check Valve Ball
The Yamada 630313 is a factory stainless steel check valve ball used in Yamada air operated double diaphragm pumps taking this ball size. It is a simple part doing a demanding job - lifting off its seat and dropping back onto it on every stroke, several hundred times a minute, in whatever the pump happens to be moving.
The usual failure is not dramatic. Output falls off gradually, the pump starts taking longer to prime, and the operator turns the air pressure up to compensate - which loads the diaphragms harder and shortens their life as well. Rolling the old balls on a flat surface will usually show the flat spot straight away.
Key Features
- Genuine Yamada replacement stainless steel check valve ball
- Material: stainless 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: 630313
- Part Type: Stainless Steel Check Valve Ball
- Material: Stainless steel
- Fits: Yamada air operated double diaphragm pumps taking this ball size
- Quantity Used: 4 per pump
- Condition: New
Frequently Asked Questions
Q: Should all four balls be changed together?
Yes. They have done the same work, and a mixed set of new and worn balls gives uneven check action between the two chambers.
Q: Does ball wear damage anything else?
Indirectly. Operators compensate for the lost output with more air pressure, and the extra pressure is taken by the diaphragms and the center rod.
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.
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 stainless steel check valve ball.
CLRMarine
