Quality issues with PPR dual-check ball valves
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PPR double-toggle ball valve for water inlet in water ring pumps; the typical opening angle of this valve is 45 degrees. The water used for feeding is the circulating water from the tank, with a pH level of 5–10. When the pH is below 7, it is necessary to add alkali to the tank (to protect the vacuum pump). Over time, particulates may appear in the water, and the valves often get damaged as well as their handles cease to function. Could you please tell me the reasons for this and what solutions are available? What kind of valve should be replaced?
It can be replaced with a diaphragm valve; in the case of a ball valve, particles can get stuck on the ball, and forcing it will cause damage!
Sometimes I think it’s a problem with the opening angle of the valve; keeping it at 45 degrees leads to prolonged exposure to circulating water. But carbon steel flanged ball valves are a bit better, though it takes a little longer
Can a diaphragm valve regulate water flow?
Can a diaphragm valve regulate water flow?
If it’s this type of impurity, the problem lies in the way it is used. It’s better to close the valve gradually when shutting it.
If it’s this type of impurity, the problem lies in the way it is used. It’s better to close the valve gradually when shutting it.
Ball valves are not suitable for such an opening degree; they must be either fully open or fully closed, otherwise their lifespan is very short. Or switching to a butterfly valve would also be better than a ball valve.