Ptfe Valve

Ptfe Valve

The PTFE valve is a kind of valves, whose main material is PTFE. A PTFE valve is also a device that regulates the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. PTFE Valves are technically pipe fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. The components of PTFE valves are gaskets, body, bonnet, ports, disc, seat, stem, spring, trim and so on. The main parts of a PTFE valve are the body and the bonnet. These two parts form the casing that holds the fluid going through the valve. The bonnet is the casing through which the stem passes and that forms a guide and seal for the stem. They have the similar structure with the common valve. The main material for these parts is PTFE.

PTFE is polymer which is extensively used in chemical, mechanical, electronic & electrical industries due to its unique characteristics. Therefore, PTFE valve has the follow features:  firstly, chemical inertness to all known chemicals, however attacked by molten alkali metals, chlorine, trifluorides, fluorine & related fluorine complexes at elevated temperature & pressure;  Secondly, resistance to solvents, insoluble in all solvents up to 260°C and certain high fluorinated oils swell & dissolve PTFE at temperature close to crystalline melting point.; Thirdly, wide operating temperature range -250°C to +260°C, at atmospheric pressure; Fourthly, lowest coefficient of friction among all known metals & nonmetals; Fifthly, negligible water absorption. Sixthly, resistance to radiations, electrical properties remain practically unchanged during & after irradiation, both in air & vacuum; Last but not least, excellent weathering resistance.