China Pumping Solutions Leader
Diaphragm pump is divided into electric diaphragm pump and pneumatic diaphragm pump
How high temperature diaphragm pump can withstand is determined by the pump material. At present, the shell selection supports PP plastic, alloy, stainless steel, cast iron four kinds. The shell material is different not only in mechanical strength and weight, but also in high temperature resistance and acid corrosion resistance.
On the diaphragm pump can withstand how high the temperature, to determine the material of the pump itself, taking into account the diaphragm pump housing tolerance temperature is usually higher, so it is more necessary to pay attention to the diaphragm inside the pump, different diaphragm function and temperature tolerance as follows:
Polypropylene film: PP material, can resist moderate strength corrosion, has good chemical resistance, is a low cost and high universality of the film, the current use of this film is to adapt to ordinary acid and alkaline liquid, poor temperature tolerance, the upper limit of the temperature is 65℃.
Polyvinylidene fluoride: PVDF material, with very reliable corrosion resistance, is currently mainly used to deal with chemical liquids containing solvents, can deal with high acid and alkaline liquids without corrosion, temperature adaptability is also good, tolerance temperature upper limit of 90+℃.
Polyformaldehyde: It has the advantages of good solvent resistance and wear resistance, low friction power and hygroscopic properties when used, but it is not high in temperature tolerance, at 65℃.
PTFE, PTFE material, in addition to part of the high velocity of liquid, can pump most of the chemical liquid, such as nitric acid and aqua regia suction can also freely, the medium temperature adaptability is very reliable, + 170 ℃, but considering the reciprocating diaphragm pump transportation behavior works, in actual use is Yong medium of dealing with the temperature below 120 ℃. In addition, it should be noted that the general plastic housing is not more than 90℃ temperature tolerance, which means that the use of this diaphragm to transport high temperature media, also need to cooperate with the metal pump body.
Fluorine plastic: specially used to deal with high concentration of acid media diaphragm, in the transport of any concentration of acid and alkaline liquid can not be damaged, the temperature tolerance is up to 170℃ above, excellent performance brings a higher price compared to other diaphragms, so customers are advised to choose the appropriate diaphragm according to the actual properties of the medium.
In summary, the diaphragm pump can withstand how high the temperature, customers should be combined with the actual water conditions to determine the pneumatic diaphragm pump internal diaphragm.
SAIKEN Pumps is a manufacturer and distributor of diaphragm pumps
