How are non-metallic mouth rings used in centrifugal pumps in chemical plants
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Previously, some companies recommended non-metallic materials for shell gasket rings to us. I’m not sure how widely they are used; has any chemical plant tried using non-metallic gasket rings?
The main issue is the difficulty in determining appropriate prices for comparison~~~ It cannot be welded or glued together~~~ Even when installed using an interference fit, there’s a risk of cracking or loosening~~~ The cost-performance ratio isn’t good； Even if corrosion resistance is required, high-nickel cast iron can be chosen~~~~~~~
There are many; the sealing rings of plastic pumps are generally made of PTFE, SIC, or ceramics
I’ve used it; it’s filled with PTFE and is used in multi-stage pumps. It requires some adjustment, but it works very well
In my opinion, for mouthpieces, it’s better to use metal; non-metallic materials are suitable only for pumps where requirements regarding flow rate and head are not high
It’s completely normal; even the graphite sleeves used normally can serve as non-metallic mouth rings
I haven’t encountered it yet; it’s just that non-metals are prone to deformation – could it fall off?
It depends on the material being processed; for non-metals, weak acids are usually used for corrosion