About shielded pumps
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Can a shielded pump be used as a stabilizer for a liquefied gas pump? What is the typical outlet pressure of a shielded pump in kilograms? Is the failure rate high? Is it easy to repair? Those that have been used can share their experiences; thanks!
I’ve never seen ones used for transporting liquefied gas; our centrifugal pumps are used for transporting aromatic compounds； The outlet pressure depends on the design of the pump; the failure rate is not very high, but there is a significant risk of cavitation and poor cooling (cooling is usually achieved using the medium itself, and liquefied gas may have limitations in this regard) ； Repairing it is quite troublesome; most of the time, the device has to be sent back to the factory for repair
We initially used shielded pumps, which kept breaking down, so we later switched to centrifugal pumps.
A shielded pump can be used, but the brand of the pump is very important; German brand Heymatic is the preferred choice, followed by Japanese brands such as Imperial and Nikkiso. Other brands should not be considered
There are models with multiple stages, and the head pressure they can achieve can reach several hundred meters; they are more suitable for clean media. If they break down, in mild cases it is necessary to replace the bearings at the front and back, while in more severe cases the unit needs to be sent back to the factory. Once it breaks, the repair costs are quite high.
This post was last edited by *aowu0515 on 2019-11-10 08:15. A diaphragm pump can be used as a liquefied gas pump, but care must be taken to avoid drawing it to vacuum. As long as there is no downtime and the operating parameters are within the rated range, the failure rate is very low. Shielded pumps have a wide range of head and flow rates; specific details should be discussed with the manufacturer based on one’s own requirements, and there is definitely a suitable model available. Repairing it is inconvenient; it generally has to be sent back to the factory for repair, which is costly. If your application often involves vacuum conditions, it is recommended to use a liquefied gas petroleum pump (scraper pump).
A well-chosen shielded pump is very useful; it has a simple structure and is easy to maintain! The key is to choose the right type; it’s particularly unsuitable for media containing solid impurities, while it works very well in environments with high cleanliness levels! For outlet pressure, multi-stage pumps from Dalian Empire were previously used, capable of handling 30+ kilograms.
No problem – we use shielded pumps for liquefied gas; they’ve been in use for several years now and are very reliable. The ones from Dalian Empire will work just fine
Shielded pumps are very useful and can be used as liquefied gas pumps, but care should be taken not to evacuate them completely.
To ensure safety and stability, a shielded pump used for liquefied gas must be equipped with a reverse return pipeline