Valve with PTFE Lined have been widely used in petroleum, chemical, pharmaceutical, metallurgy, electric power and other industries in contact with acid and alkali and other strong corrosive media devices, but how to choose and use good Valve with PTFE Lined, according to the experience of our users over the years of field application, When selecting fluorine-lined anti-corrosion valve, it should put forward the following precautions for the use of several conditions such as medium temperature, pressure, pressure difference:

1.Temperature Limits: PTFE-lined valves, using F46 (FEP), should not exceed 150°C for continuous use (short-term peaks up to 150°C are acceptable, but long-term should be within 120°C) to prevent softening and deformation. For temperatures below 180°C short-term and 150°C long-term, consider using PFA, although it's more expensive.

2.Avoid Negative Pressure: Fluoroplastic valves should not be used under negative pressure as it can cause the lining to bulge or peel, leading to failure in opening or closing.

3.Control Pressure and Differential: Especially for PTFE-bellows sealed valves, high pressure and differential can lead to bellows rupture. Consider switching to a four-fluorine packing seal for high differential applications.

4.Avoid Abrasives: Fluoroplastic valves should not be used with media containing hard particles, crystals, or impurities that could damage the valve internals. If such media is present, consider using Hastelloy for the spool and seat.

5.Proper Sizing: Choose the correct valve size based on the required flow rate (Cv value). Oversizing can lead to long-term operation at low opening degrees, causing valve core and stem vibration and potential breakage due to continuous media impact.
Some common examples like：Flange Butterfly Valve PTFE Lined，PTFE Lined Ball Valve