The valve seat of the check valve in the diaphragm pump is always damaged
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The company has installed an environmental protection system that includes diaphragm pumps, with parameters of 1000 L/h and a pressure of 3 Kg； The pipeline is about 30 meters long, and the medium used is a water purifier (containing activated carbon in the form of small particles). Within less than 10 minutes of operation, the ceramic ball in the check valve damaged the steel valve seat; the ceramic ball got stuck there, preventing the chemical from being delivered. Does anyone know what’s causing this? Is there a problem with the pump selection?
I wonder what the flow rate requirement is when the device is in operation? Furthermore, the medium contains small particles that accumulate at the valve seat position, affecting the flow rate
Let’s see how it works with the tee replaced by polytetrafluoroethylene
Contact the pump manufacturer and ask to change the material of the valve seat to a non-metallic, flexible material to see if that helps. If that doesn’t work, then this application is not suitable for diaphragm pumps; consider other types of positive displacement pumps instead
The ceramic ball is completely stuck in the valve seat, which prevents any flow of fluid; when it was removed to check for leaks, the valve seat still remained sealed
Stainless steel ones won’t work, and polytetrafluoroethylene is too soft.
Could it be a problem with the pump selection?
It could also be a quality issue with the pump; it’s a small pump with a capacity of 1 cubic meter. I’m not sure which brand you purchased it from.
The problem lies in the pump selection; the small particles of activated carbon in the medium can abrade the valve seat.
The material of the valve seat and the ball is a critical factor; currently, both are made of rigid materials, which require high purity of the medium (the presence of particles is absolutely not acceptable). If the ball is slightly raised by particles or damaged, its sealing performance deteriorates. It is recommended to use materials for the valve seat and the ball that have greater tolerance.