What type of level gauge should be used for 40% hydrofluoric acid, and should it be installed on the side wall?
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Urgent request: What type of level gauge should be used for 40% hydrofluoric acid, and should it be installed on the side wall? Generally, a manufacturer’s product is used
For side-wall installation, an anti-corrosion magnetic flap level gauge can be considered.
In principle, it is fine to use an anti-corrosion type magnetic float level gauge, but given the corrosiveness of the medium, it is necessary to carefully select the material for the parts in contact with the liquid.
Generally, PP or ones lined with PTFE are used; check what material your tank is made of, and use something that matches it
We used PP connecting rods before, but they got corroded; later we used those that do not come into contact with liquid, but this time it is required to use mechanical ones. Could it be that there was a problem with the previous PP material?
Then the magnetic flap level gauge made of PP material
Hydrofluoric acid – damn, what a deadly acid! Just seeing it in a beaker is enough to make one so scared they’ll wet themselves~~~
PP material should be polypropylene, a thermoplastic resin produced by the polymerization of propylene. Based on the arrangement of methyl groups, it is divided into three types: isotactic polypropylene, atactic polypropylene, and syndiotactic polypropylene. Polypropylene can resist hydrofluoric acid at concentrations of less than 40% and nitric acid at concentrations of less than 25%, with a maximum operating temperature of 107°C. Polytetrafluoroethylene: Its operating temperature should not exceed 250°C. It can withstand hydrofluoric acid at a concentration of 70%. You can refer to this article: https://wenku.baidu.com/view/7258dd12866fb84ae45c8d37.html
Differential pressure double-flange capillary level gauge; the diaphragm is typically made of 316 material, or a PTFE diaphragm can be used. This diaphragm can be manufactured by oneself or obtained from a distributor. During installation, be sure to press the PTFE diaphragm tightly against the transmitter’s flange diaphragm, and apply Vaseline or medical ultrasound coupling gel to remove any air. It has a slight impact on measurement accuracy, but it has a low cost of use and satisfactory results. College students, one-on-one, hurry up and go!