I have a few questions regarding vertical self-priming pumps!
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The device is equipped with a vertical self-priming pump for transporting sewage; the WFB type represents a sealless design. I’m very curious about how its sealing mechanism works Also, I don’t see any filling point for this pump; how is it lubricated?
The centrifugal force generated by the rotation of that impeller above prevents the liquid from coming out
In other words, a pump with this structure indeed has no mechanical seal. Also, do you know how lubrication is done?
Go to the motor to find the bearing oil filler port.
Dynamic seal with a K-type seal (similar to an oil seal, but without a spring), lubricated by the medium.