1/4'' Anti Corrosive PTFE Diaphragm Solenoid Valve AC220V

Polytetrafluoroethylene (PTFE), commonly known as "Plastic King", is a high molecular polymer produced by polymerizing tetrafluoroethylene monomer, with a chemical formula of (C2F4)n. It has excellent heat and cold resistance and can be used for long periods of time at -180～260ºC. This material has the characteristic of being resistant to acids, alkalis, and various organic solvents, and is almost insoluble in all solvents. At the same time, PTFE has the characteristic of being resistant to high temperatures, and its friction coefficient is extremely low, so it can be used as an ideal coating for cleaning the inner layer of water pipes in addition to its lubricating function. On October 27, 2017, the International Agency for Research on Cancer of the World Health Organization released a preliminary reference list of carcinogens, and PTFE was listed in the third category of carcinogens.

Physical and chemical properties:

 Density: 1.3±0.1 g/cm3; Boiling point: 400 ºC; Melting point: 327ºC; Molecular formula: (C2F4)n; Molecular weight: 100.015; Flash point: -119.7±7.1 °C; Exact mass: 99.993614; LogP: 1.90; Appearance: colorless gas; Vapor pressure: 19951.6±0.1 mmHg at 25°C; Refractive index: 1.35; Storage conditions: Store at room temperature in a sealed, dark, ventilated and dry place; Stability: Stable at normal temperature and pressure, avoid moisture, heat, and high temperature. It has no true melting point and slowly decomposes above 450℃, directly becoming gas. At 327℃, the mechanical strength suddenly disappears. It is insoluble in any solvent. It is not corroded by any substance except for reacting with molten alkali metals. Even if boiled in hydrofluoric acid, aqua regia, fuming sulfuric acid, or sodium hydroxide, it does not undergo any changes.
PTFE is a white, odorless, tasteless, and non-toxic powder, commonly known as "Plastic King". It has excellent chemical stability, corrosion resistance, sealing performance, high lubricity, non-stickiness, electrical insulation, and good aging resistance. It is heat-resistant and can be used at a working temperature of up to 250℃. It is also cold-resistant and has good mechanical toughness at low temperatures. Even at a temperature of -196℃, it can maintain a 5% elongation rate. It is corrosion-resistant and exhibits inertia to most chemical drugs and solvents, and can withstand strong acids, alkalis, water, and various organic solvents. It has good weather resistance and has the best aging life among plastics. It is highly lubricated and has the lowest friction coefficient among solid materials. It is non-adhesive and has the smallest surface tension among solid materials, and does not adhere to any substance. It is non-toxic and has physiological inertness, and can be implanted in the human body for a long time as an artificial blood vessel or organ without any adverse reactions.

Solubility in water: Insoluble
Ptfe Valve
1. Characteristics: There are three types - granular, powder, and dispersed liquid. It is transparent when neutral, and becomes grayish-white as thickness increases.
2. Density (g/mL, 25℃): 2.1-2.3
3. Relative vapor density (g/mL, air=1): Undetermined
4. Melting point (ºC): 327
5. Boiling point (ºC, normal pressure): 400
6. Boiling point (ºC, 5.2kPa): Undetermined
7. Refractive index: 1.37 (20℃)
8. Flash point (ºC): Undetermined
9. Specific rotation (º): Undetermined
10. Autoignition temperature (ºC): Undetermined
11. Vapor pressure (kPa, 25ºC): Undetermined
12. Saturated vapor pressure (kPa, 60ºC): Undetermined
13. Combustion heat (KJ/mol): Undetermined
14. Critical temperature (ºC): Undetermined
15. Critical pressure (KPa): Undetermined
16. Logarithmic value of oil-water (octanol/water) partition coefficient: Undetermined
17. Explosive upper limit (% V/V): Undetermined
18. Explosive lower limit (% V/V): Undetermined
19. Solubility: Insoluble in any solvent. [2]

PTFE GASKETS FOR SCREW

Soluble Ptfe Pipe, Soluble Ptfe