Line four fluorine pneumatic valves of different material characteristics of each have what advantage

Lining four fluorine pneumatic valve as used to implement the on-off and flow control of a piping system components, has been in the petroleum, chemical industry, metallurgy, water and electricity and widely used in many fields. Among known pneumatic valve technology, its seal form is mostly adopts the sealing structure, sealing materials for rubber, etc. Suitable for nitric acid and aqua regia, all kinds of organic acid, acid, oxidizing medium or high temperature sulfuric acid, high temperature and strong alternating acetic acid, alkali and a variety of organic solvents and other strong corrosive medium.




using pneumatic valve rod rotating plate for open/close together, to open closed with pneumatic valve adjustment. Pneumatic valve adopts split type combination. Convenient for assembly and seal adjustment, pneumatic valve work only whole fluorine plastic seat and the rubber fluorine plastic board contact with the medium. Pneumatic valve body channel inner surface is smooth, fluid resistance small, CV value is high, the flow capacity is strong, torque is moderate, completely reach the zero leakage of medium, small volume light weight structure compact switch quickly beautiful shape process reasonable reliable performance, convenient operation with long service life. Can withstand any other than the molten alkali metals and fluorine element corrosive medium, chemical oil medicine is food paper such as hydropower environmental protection system of iron and steel smelting gas liquids semifluid of on line and the container quickly cut off and regulating equipment use the ideal product.
four fluorine pneumatic valve lining material that can be used more common including the perfluorinated ethylene FEP ( F46) , three fluoride PCTEF ( F3) , the polypropylene: RPP, polyvinyl chloride (PVC) : hard) PVC, poly tetrafluoroethylene PTFE ( F4) Poly (vinylidene chloride PVDF ( F2) Several kinds of materials such as polyolefin, PO. So what use material is better, the different material in production features, what are the advantages and let below small make up to you to introduce:
1, the whole fluorine ethylene FEP ( F46)
applicable medium: any organic solvent or reagent, thin or thick inorganic acid, alkali, ketone, aromatic hydrocarbons, chlorinated hydrocarbons, etc.
use temperature: - 85 ~ 150
features: mechanics, electricity performance and chemical stability of basic same as F4, but prominent advantage is still hit high toughness, good weatherability and radioactive.
2, poly (vinylidene chloride PVDF ( F2)
use medium: resistant to most chemicals and solvents used
temperature: -
features: 70 ~ 100 the gentlemen and strength and compression strength is better than the F4, bending resistance, weather resistance, radiation resistance. Light and aging resistance, etc. , is characterized by good toughness, easy to shape.
3, 3 fluoride PCTEF ( F3)
applicable medium: all kinds of organic solvent and inorganic corrosion liquid ( Oxidizing acids)
use temperature: - 195 ~ 120
features: heat resistance, electric properties and chemical stability after F4, mechanical strength, creep properties, hardness than the F4 better.
4, polypropylene: RPP
applicable medium: aqueous solution of inorganic salts, inorganic acids, alkali thin or thick solution of a class.
use temperature: - 14 ~ 80
features: one of the plastic lighter, its yield, tensile and compression strength and hardness are better than that of low pressure polyethylene, four fluorine pneumatic valve adopts the lining of the material has a outstanding rigidity, good heat resistance, easy forming, excellent inexpensive. Modified seasonal, liquidity, bending elasticity.