Which type of pump is recommended?
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I have two operating conditions: 1) Solid content of 1%, liquid density of 1.2, the solids are activated carbon particles, and the temperature is 70°C. 2. The solid content is 25%, the specific gravity of the slurry is 1.3; the solids are product particles that are relatively fine. Fiberglass-reinforced plastic corrosion-resistant pumps are currently being used. Could you recommend a more suitable pump? The user requires no leakage, and it’s not feasible to use external cooling water for the mechanical seal – how should I choose a pump in this case?
Depending on the impurity conditions, a static mechanical seal can be selected. If you have detailed data, it can help you choose several pumps.
Based on the information provided by LZ, the recommendations are as follows: 1. If the medium contains a certain amount of solid particles, semi-open or fully open impellers can be used; if the amount is very small (for example, 1%), closed impellers can also be chosen； 2. If it is not possible to supply a sealing fluid from the outside, then the PLAN31 sealing and flushing scheme can be used. If the medium temperature is 70 degrees, PLAN41 may be necessary (the decision ultimately rests with the pump manufacturer based on the actual operating conditions). PLAN41 requires external cooling water; if no cooling water is available, the manufacturer can be asked to install an air cooler.
In my opinion, these are technical requirements to be presented to pump manufacturers; the companies responsible for selection should be more professional. If you are a designer at a manufacturer, this requires in-depth discussion
You didn’t specify whether it is corrosive, the flow rate, or the head. Diaphragm pumps can be considered. What’s wrong with the current fiberglass-reinforced plastic corrosion-resistant pumps? Isn’t it useful? 2 What specific particles are they? Pumps made of UHMWPE material can also be considered
Thank you all! After comprehensive consideration, the self-cleaning function of chemical process pumps is sufficient for handling 1% particles, while slurry pumps with 4-speed motors are appropriate for dealing with 25% fine particles; no cooling water is required, although this results in a shorter service life for the mechanical seals compared to normal operating conditions ； It’s indeed hard to make a choice