Corrosion-resistant centrifugal pump the difference between the fluorine plastic F4 and F46 raw materials

Corrosion-resistant centrifugal pump is applicable to transport any concentration of strong acid, strong alkali, salt, antioxidant and other corrosive liquid chemical centrifugal pump, the commonly used material has nonmetallic material, such as fluorine plastic, the shell adopts metal shell lining fep ( 聚全氟乙丙烯) And flow components in plastic alloy (all 聚四氟乙烯、聚全氟乙丙烯) Is made. When we we purchase in fluorine plastic corrosion-resistant centrifugal water pump, the pump manufacturer usually ask you to F4 material or F46 material? Then the two raw materials how to distinguish?

from the heat resistance points:

F4 material is PTFE corrosion-resistant centrifugal pump, Chinese name: PTFE, is a kind of engineering plastics, it use a wide range of high and low temperature range, excellent chemical stability, high electrical insulation, the surface of the file is not sticky, good lubricity, atmospheric aging resistance, incombustible and self-extinguishing. The relative density of 2. 1 - 2. 3, the glass transition temperature of 327 degrees. Non-stick coating can be used in the 260 ℃ continuous and 290 - the highest working temperature 300 ℃, low friction coefficient, good wear resistance and excellent chemical stability. Widely used in high temperature resistant, Continuous use under 260 ℃) High-frequency insulation, micro coaxial cable wire and cable, industrial control cables, insulation casing around the cable.

anti-corrosive centrifugal pump F46 material is FEP, Chinese name: FEP, is a modified ptfe material. F46 ptfe similar characteristics and a thermoplastic good processing performance. Non-stick coating melt flow form non-porous membrane when baking, has excellent chemical stability, excellent non-stick characteristics, the highest temperature is 200 ℃. Mainly used in high insulation, high temperature resistant, corrosion resistant coating layer of wire and cable and sheath, can be in continuous use under 200 ℃ in a wide temperature and frequency range with low dielectric constant, dielectric loss and high dielectric strength. In the air can't burn ( The limit oxygen index > 95%, extremely V - UL94 flame 0)

F46 - scope of heat-resistant 200 ℃ ~ 270 ℃, the F4 - scope of heat-resistant 200℃~280℃。

from the color points:

F4 white opaque, F46 ashen white, translucent.

from nature to distinguish: PTFE (

F4) For ptfe, heat resistance and corrosion resistance are good, but any medium corrosion resistance, color is off white, commonly used for lining fluoride pipelines, valves, seals, bar, etc. , FEP ( F46） For fep, color is transparent, corrosion resistance and PTFE, more commonly used for lining fluoride or perfluorinated pump.

F4 and F46 have strong corrosion resistance and chemical stability, F4 material F46 hard some physical properties, heat resistance than F46, approximately 200 degrees, but the F4 forming is more difficult, so many parts of complex shape with F46 by system. Both use together, can increase the wear resistance.

聚全氟乙丙烯( F46） Cheaper, PTFE ( F4) Your point. Therefore, F4 material corrosion resistance than F46, if it is acid alkali liquid, we'd better choose F46 material.

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