Application of rigid waterproof casing.

The opening degree of rigid waterproof casing main pipe is determined by the size of the water impact in the pipeline, the main pipe opening degree is large when the flow rate is high: the pipe opening degree is small when the flow rate decreases: when the flow rate is close to zero, the main pipe is closed. The whole process coincides with the principle of water hammer speed closure, so the water hammer effect is very good. Rigid waterproof casing closure, in the diaphragm type upper and lower cavity to form a pressure difference can only be achieved, that is, after the closure of the main pipe, the slow closure of the pipe can only be closed, so it is impossible to produce slow closure and speed closure synchronization phenomenon.
Desalination medium contains a low concentration of acid or alkali, they have a large corrosive rigid waterproof casing. Rigid waterproof casing is corroded manifestation of expansion, aging, low strength, with the use of rubber-lined rigid waterproof casing are poor in essence is the rigid waterproof casing is not resistant to corrosion caused. Improve the rigid waterproofing casing for good corrosion resistance, but the rigid waterproofing casing diaphragm and can not withstand the up and down folded and broken, resulting in mechanical damage, the valve life becomes shorter. Now the better way is to use the water treatment special ball valve, it can be used to 5 ~ 8 years.