What type of pump should be used to draw the material from the 200-liter tank and pump it into the high-level tank?
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In our daily production, we need to transfer organic solvents packaged in 200-liter steel tanks purchased from external suppliers into tanks located at a height of 10 meters. We have used pneumatic diaphragm pumps for this purpose; the solution works well, but the diaphragms tend to break easily, resulting in high maintenance costs； I also used a so-called self-priming pump produced in Ningbo, whose impeller was made of fluororubber. The impeller was in contact with the pump casing, which allowed it to evacuate air on its own and pump the material without the need for pre-filling with water. However, fluororubber does not have very good resistance to solvents; over time, the impeller would swell due to this and needed to be replaced. I also saw information on barrel pumps, but they are mainly foreign-made products; domestic versions are now available as well, but there are concerns about their quality. Moreover, the pumping speed of barrel pumps is a bit too slow. I wonder if there are any other self-priming pumps in China that do not require water filling before use, in order to facilitate the extraction of materials from large numbers of packaging barrels; or if there are any better suction methods available. I would appreciate some advice from those who know more about this. Thank you!
We have been using gear pumps, and they work fairly well. The only issue is that the mechanical seals of these gear pumps tend to leak from time to time, requiring repairs; no problems have arisen so far during use
10 meters is too high; a single pump has to both draw in fluid and push it out, and the pipe diameter is limited, so the flow rate will definitely be restricted. Using an intermediate tank with a pipeline pump will make pumping much easier; a gear pump is the preferred choice for the upstream stage
Imported pneumatic diaphragm pumps are used; the diaphragm of such pumps is a crucial element, and it’s important to choose the right type. PTFE diaphragms are too hard, while EPDM diaphragms can also be considered. However, it’s essential to purchase diaphragm pumps from well-known brands such as Yamada, Weldon, or Ingersoll Rand. Domestic diaphragm pumps tend to break down easily and are not reliable.
Based on the experiences of those upstairs, I checked the specifications for gear oil pumps, and it states that such pumps are not suitable for transporting liquids that are highly volatile or have a low flash point, such as gasoline and benzene. And what I am transporting is propylene; is it feasible to use a gear pump?
Can’t we use a centrifugal submersible pump? Here is a manufacturer’s website link for a pump for your reference: http://www.samsco.com.cn/info/21831.htm! This post was last edited by Li Yiheng on 2008-2-17 13:21]
Compressed air can be used to be pushed into the tank, with the discharge pipe inserted at the bottom of the tank to expel the material using air.
It is recommended to use fluorine alloy magnetic self-priming pumps; for details, please contact Chen Bingrong from Wu Xin Fluorine Pumps
To go back to the 7th floor and deliver the materials at a height of 10 meters means dealing with a pressure of around 0.1 Mpa. Using compressed air to compress plastic buckets is an extremely unreliable and unsafe method; this approach is simply not viable.:)