Polytetrafluoroethylene sealed disc valve
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I would like to ask everyone: what is the temperature tolerance of disc valves with PTFE sealing surfaces? Is it more prone to aging, and does its service life need to be shorter compared to alloy steel sealing surfaces? Thank you......
Although both can resist corrosion, the choice depends on the temperature of the medium and the price you are willing to pay. Generally, PTFE seals can withstand temperatures up to around 100 degrees; if the temperature exceeds this level, their service life will be reduced. And the cost of the alloy is a bit high.
If the temperature exceeds 150 degrees, it is recommended to use a triple-eccentric metal-sealed butterfly valve, which offers much better durability; moreover, the sealing surface can be welded with STL. Actually, the price can’t be that much higher either.
If the temperature exceeds 150 degrees, it is recommended to use a triple-eccentric metal-sealed butterfly valve, which offers much better durability; moreover, the sealing surface can be welded with STL. Actually, the price can’t be that much higher either.
It can withstand temperatures up to 200 degrees; it’s best to consult a professional manufacturer and provide them with your specific requirements, so that they can help select the appropriate model.
Fluorinated-lined valves are primarily used in applications where certain metal valves are not suitable; their use is limited by pressure and temperature factors, they have poor tolerance to vacuum conditions, and they are also not appropriate for use with media that cause wear
Disc valves with PTFE sealing surfaces should not be exposed to temperatures exceeding 150°C. Leakage is mainly a problem caused by wear.
Alloy steel has good wear resistance; as the previous friend mentioned, its cost is high. It ultimately depends on the medium in which it will be used – the temperature of the PTFE sealing surface is 150 degrees
There are generally two types of lining materials: one is F46 (i.e., FEP), which can be used at temperatures ranging from -30°C to 120°C. For applications where the temperature is between 120°C and 150°C, we recommend using PFA material； The recommended operating temperature should be between -30°C and 120°C, with the normal operating temperature being below 100°C ； When using PFA material, the maximum instantaneous operating temperature should not exceed 150°C. Compared to alloy steel, in addition to considering the temperature of the medium, the pressure of the process medium must also be taken into account. Linered valves can generally handle pressures up to 150LB (PN2.0); when the medium pressure exceeds 1.0 MPa, it is not possible to expect them to last long. If they are not operated frequently, a lifespan of one year is considered good. Of course, the price of the alloy is several times or even a dozen times that of the lining; it depends on your choice