There are many electromagnetic metering pumps on Taobao priced at over 400 yuan, claimed to be corrosion-resistant; if the valve is made of PTFE, isn’t this price too low?
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I want to buy a small pump for use in the laboratory, one that can transfer organic solvents from one bottle to a higher bottle gradually, so that I don’t have to pour the solvent manually each time; I just need to press the start button. I saw many electromagnetic metering pumps on Taobao, priced at four to five hundred yuan. It is stated that the valve core and the inlet and outlet valves are made of PTFE. I wonder: if the valve core is indeed made of PTFE, wouldn’t a cost of four to five hundred yuan be insufficient? If I use it to extract organic solvents such as dichloromethane, ethyl acetate, petroleum ether, and methanol, will the valve get corroded? Thank you very much for consulting experts who have used such electromagnetic metering valves!
Could it be an overstatement? It’s not polytetrafluoroethylene; calling it that is incorrect ； I have doubts; if it really uses a PTFE valve core, is it possible to keep the price low enough?