Is the valve core of the cut-off ball valve hollow?
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Today, one of our company’s pneumatic valves started leaking internally. When we opened it to check the valve core, we found that the ball valve element had indeed corroded. What’s interesting, though, is that the ball valve element was hollow. After communicating with the manufacturer, they said that the valve cores of ball valves weighing less than 16 kilograms are hollow. I wonder if any expert can explain whether such a standard exists Is it still a quality issue? Is it still the issue of cutting corners?
Two methods: 1. Verify whether it is accurate based on the standards at the time of ordering. 2. Have them provide **standards to prove it**. But the people who placed the order at that time should have known, right?
The valve ball is corroded; it is necessary to determine whether there was an error in the material selection during design or whether the manufacturer failed to use the appropriate materials. The valve core is generally solid; it’s not clear whether it can be hollow depending on the pressure rating.
Valve ball corrosion is caused by process operation errors. It’s quite puzzling that the valve ball is hollow
Refer to GB/T 12237-2007 Steel ball valves for use in the petroleum, petrochemical, and related industries
A specialty from Wenzhou; maybe your price is too low – that’s the quality you can expect at that price.
I never even thought there was such a thing as a hollow sphere; I need to pay attention to that when signing the technical agreement next time. :L
It is usually a solid ball; some manufacturers use hollow balls in order to save costs
I’ve never encountered this; normally it should be solid