The application temperature of the main raw material of the valve refer to the matters needing attention when using fluorine-lined anti-corrosion valve

The application temperature of the main raw material of the valve refer to the matters needing attention when using fluorine-lined anti-corrosion valve

Valve main raw material application temperature reference, such as 304 stainless steel plate, 316 stainless steel plate, brass, Inconel alloy, K manganese Nell alloy, manganese Nell alloy, Hastelloy B, Hastelloy C, titanium alloy, nickel base alloy, alloy 20, type 416 stainless steel plate 40RC, 440 stainless steel plate 60RC, 17-4PH, No.6 alloy (Co-Cr), chemical nickel, stainless steel, etc..
Valve main raw material application temperature
Raw material
Low limit /℃ Low limit /°F limit /℃ limit /°F304 type stainless steel plate -268-45031660 Type 0316 stainless steel plate -268-450316600 brass -273-460232450 Inconel alloy -240-4006491200K manganese El alloy -240-4004829 Manganese nello-Hastelloy B-371700 Hastelloy C-5381000 titanium alloy -316600 nickel base alloy -198-32531660020 alloy -45-50316600416 stainless steel plate 40RC-29-20427800440 stainless steel Steel plate 60RC-29-2042780017-4PH-40-404278006 alloy (Co-Cr) -273-4608161500 chemical nickel -268-450427800 stainless steel -273-460316600 butyl rubber -40-4093200 fluorine glue -23-10 204400 tetrafluoroethylene -268-450232450 polyester -73-10093200 high pressure polyethylene -73-10093200 chloroprene glue -40-4082180 lined fluorine plastic anti-corrosion valve needs to pay attention to the use of fluorine plastic valve used by the medium temperature: Our company’s various lined fluorine plastic valve, the polyphenylene sulfide is F46(FEP), the use of the medium temperature shall not exceed 150℃(medium temperature can be 150℃ in the short term, long time application temperature should not exceed 120℃), otherwise, the parts of the valve lining F46 soft, variant, resulting in the valve closed, leakage is large. Customers in the use of all kinds of fluorine lined plastic valves, should try to understand, grasp the application of technical standards, easy to select, use the right, improve the service life of the valve.
Fluorine-lined anti-corrosion valves have been used in crude oil, chemical plants, pharmaceuticals, metallurgical industry, electric power engineering and other fields touching strong acid and alkali and other strong etched media devices, but how to select and use the pair of fluorine-lined valves, according to our customers over the years of on-the-spot use of work experience, Fluorine-lined anti-corrosion valve is used to solve the medium temperature, working pressure, pressure differential and other types of application scope summarized as follows:
1, lined with fluorine plastic valve used by the medium temperature: Our company’s various lined fluorine plastic valve, the polyphenylene sulfide is F46(FEP), the use of the medium temperature shall not exceed 150℃(medium temperature can be 150℃ in the short term, long time application temperature should not exceed 120℃), otherwise, the parts of the valve lining F46 soft, variant, resulting in the valve closed, leakage is large.
If the medium temperature used in the short term temperature in 180℃, long-term temperature within 150℃, you can choose another kind of polyphenylene sulfide; PFA, but PFA lining polyphenylene sulfide will be more expensive than F46 lining price.
2. No negative pressure. Fluorine lined plastic valves should be used as far as possible in the pipeline there is negative pressure, if there is negative pressure, easy to lead to the fluorine lined plastic layer of the inner wall of the valve is sucked out (puffed up), decaying, resulting in valve opening, closing failure.
3, working pressure, pressure difference should not exceed the allowable range. In particular, the bellows are sealed with fluorine plastic regulating valves and cut-off valves. Because the metal bellows are made of PTFE material, the working pressure and low pressure are easy to cause the metal bellows to crack.
Bellows sealed with fluorine plastic regulating valve, applicable range of working pressure, low pressure, can be changed to four fluorine packing sealing.
4, fluorine plastic valve used by the medium standard is not suitable for hard particles, crystals, residue, etc., in order to prevent the valve in the open, cancel the operation of the valve heart, high pressure gate valve lining fluorine plastic layer or fluorine bellows. The medium has hard particles, crystals, impurities, when used, the valve core, high pressure gate valve can be changed into Hastelloy.
5, lined with fluorine plastic regulating valve should be in accordance with the necessary platform flow (Cv value) appropriate use of valve diameter. In the selection, should be based on the must platform flow (Cv value) and other performance parameters to calculate the valve should choose nominal diameter and valve opening degree, such as the valve diameter selection is too large, is bound to make the valve long-term operation under the premise of relatively small opening degree, coupled with medium pressure, so that it is easy to make the valve core, rod suffered medium impact and then the valve caused vibration, The valve stem is under the influence of the medium all year long, and even the valve seat will be broken.
Customers in the use of all kinds of fluorine lined plastic valves, should try to understand, grasp the application of technical standards, easy to select, use the right, improve the service life of the valve.