PTFE can also be corroded; pump manufacturers that use stainless steel for the diaphragms in reciprocating or pneumatic pumps
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Currently, for component monitoring, it is necessary to draw a small amount of liquid out of the reactor and then return it to the reactor. The gaskets used in the system are made of PTFE, and they have performed well without suffering any corrosion. Therefore, a domestic pneumatic diaphragm pump was chosen; however, after it was in use for a short time, the PTFE balls in the check valves at the inlet and outlet, as well as the PTFE diaphragm itself, became corroded and shrank in size. It was thought that this was due to the quality issues of the domestic products, but the same problem occurred when a pneumatic diaphragm pump imported from Japan, made of what is called Teflon, was used. I can’t figure out why corrosion occurs either. Since the reactor body is made of 304 steel, which is resistant to corrosion, I thought that using stainless steel for our diaphragms and check valve balls should solve the corrosion problem. However, I haven’t been able to find any manufacturers that produce such components. Do any of you know of any manufacturers that specialize in sausage production?
Or should a volumetric pump with a different flow rate (100 L/h) be used instead? Gear pump or peristaltic pump?
The liquid is drawn from the top of the tank to the bottom and then returned into the tank; a suction height of 5 meters is sufficient, with the tank pressure being 0.4 Mpa
If the medium is only corrosive and poses no harm to the human body, a plunger metering pump can be chosen; if it is harmful, a diaphragm metering pump is a better option. Almost any common material can be used – just specify it to the manufacturer.
What are the components of the liquid? Please provide it
The possibility of corrosion is low; it’s likely that wear has occurred. There must be components in the material inside the reactor that cause significant wear (such as powdered materials added). For workstations like this, the problem can be solved by using a stainless steel pump body, a Teflon diaphragm, and a stainless steel valve ball.
Teflon material does not corrode. Are there any impurities in your material? It’s possible that it has been worn out. What is the material that you are transporting? What’s the temperature?