Reasons for low output of semi-open impellers
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What clearances need to be considered for a semi-open impeller inside a volute? What are the gaps at the rear of the leaves and between the impeller and the front end?
Check some information; it should state there how to adjust the wear-resistant disk
For semi-open impellers, attention should be paid to the clearance at the front end, which should be between 0.5 and 2 mm depending on the properties of the medium!
It depends on what type of unit you have; it would be better if there are pictures. If the production volume isn’t high, there might be a problem with the gap between the impeller and the mouth ring!
The gap has little impact; generally, the rear gap is made larger than the front gap. The total gap is generally 1.5 mm, with 1 mm left for the rear gap. Check whether the volute flow channel is blocked; we have encountered this issue before.
The gap has little impact; generally, the rear gap is made larger than the front gap. The total gap is generally 1.5 mm, with 1 mm left for the rear gap. Check whether the volute flow channel is blocked; we have encountered this issue before.
The gap has little impact; generally, the rear gap is made larger than the front gap. The total gap is generally 1.5 mm, with 1 mm left for the rear gap. Check whether the volute flow channel is blocked; we have encountered this issue before.
The gap has little impact; generally, the rear gap is made larger than the front gap. The total gap is generally 1.5 mm, with 1 mm left for the rear gap. Check whether the volute flow channel is blocked; we have encountered this issue before.
The gap has little impact; generally, the rear gap is made larger than the front gap. The total gap is generally 1.5 mm, with 1 mm left for the rear gap. Check whether the volute flow channel is blocked; we have encountered this issue before.
What was said on the third floor is correct – the gap at the front end has a significant impact on the pump’s performance. It depends on the particle size of the medium; the faster the motor speed, the more pronounced the effect.
Moreover, the gaps are already adjusted by the manufacturer at the time of production. If adjustment is necessary, it is best to do so by adding shims to the end face of the pump body or to the root of the impeller; try to avoid using adjustment screws, as moving the impeller by pulling on the bearings can easily result in either too much or too little compression of the seal, which affects its service life and may even cause leakage