The Regular Polymer Materials Brief Used For Ball Valve Seat

The Regular Polymer Materials Brief Used For Ball Valve Seat

1. PTFE-F4
Teflon (PTFE-F4) has excellent heat resistance, cold resistance, non-sticky, good self-lubricating, low coefficient of friction (0.05) and other characteristics. 
The main scientific characteristics:
(1) Long term work temperature between  -250 ~ 260 ℃
(2) Afford 5 MPa load,
(3) The density 2.2 g/cm, 
(4) Thermal conductivity 0.25 W/(mc),
(5) Linear expansion coefficient (10 ~ 15) × 10-5  
(6) Tensile strength 10 to 30 MPa
(7) Elastic mould 400 Mpa
(8) Medium: Strong acid, concentrated alkali, strong oxidants and any concentration of boiling hydrofluoric acid and other media.



2. PCTFE-F3
PCTFE-F3 has excellent cold resistance, high strength and hardness.
The main scientific characteristics:
(1) Long-term work temperature between  -195~120℃
(2) The density 2.1g/cm3
(3) Thermal conductivity 0.058W/(m.c) 
(4) Linear expansion coefficient (415~710)×10-5/℃
(5) Elastic mould 1300MPa
(6) Medium: higher temperatures inorganic acids, lower temperatures salt solution strong oxidants, room temperature organic media.



3. PFEP-F46
PFEP-F46 has high temperature and low temperature resistance
The main scientific characteristics:
(1) Long-term work temperature between -85 ~ 205 ℃
(2) The density 2.1g/cm3
(3) Thermal conductivity 0.25W/(mc) 
(4) Linear expansion coefficient (9.5 to 19.6) x 10-5/ ° C
(5) Tensile strength 20 MPa
(6) Medium: various concentrations of inorganic acid, alkali, alcohol, ketone, hydrocarbon, halogenated hydrocarbon, phenylene, grease and detergent.



4. Polyether ether ketone (PEEK) 
PEEK has thermosetting plastic heat resistance, chemical stability and thermoplastic molding process performance.
The main scientific characteristics:
(1) Long-term work temperature up to 240 ℃
(2) The density 1.3g/cm3
(3)Tensile strength 162MPa
(4) Medium: sulfuric acid, nitric acid, 200 ~ 260 ℃ steam