Document 4QoGNx5E4w3xLrr5jVE7DBLEQ
Application
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Heat
E.2.15 (Petroleum and Mining))
PTFE-containing composite fluorine-based elastomers 9002-84-0
packings,
gaskets
PTFE
Plant piping, pumps, valves, heat exchangers, pressure vessels
Seat gaskets, fluororubber O-rings, gland packings
attached
Materials that can be used for seal members are selected according to the temperature and fluid. In specifications where fluorine-based materials are used, temperatures of 150C or higher, resistance to fluid, or purity is required, and they are expensive, but are used because they cannot be substituted with other materials.
(VALQUA product catalogs, etc.)
The amount of raw materials used for this product is 44,823 tons/year, but the amount used only in Japan for the applications is estimated to be 1,470 tons/year. The amount used in one product is <20~50% by weight, which has a huge impact on the industries where it is used. Applications include long piping in chemical plants and petroleum refinery plants, and they are also used inside industrial equipment attached to them. In these industrial plants, production is carried out in a continuous flow from raw material input to final materials, so production would be impossible without even portion of this part. For the domestic production scale for the applications in which PFAS is used: Fuel oil production amount at petroleum refinery plants: 132,589,000 KL/year Ethylene and propylene use amount at petrochemical plants: 11,500 thousand tons/year 260C (PTFE), 200C (fluororubber)
Resistance (Highest Working Temperature) Weather Resistance Chemical Resistance
NonAdhesiveness Purity
PVC
PP
High-Density PE Silicon Resin
Silicon Rubber
PEEK (Polyether Ether Ketone) Remarks
No influence of direct sunlight
Stable against most chemicals. Slightly affected by molten (solutions), high-temperature chlorine trifluoride. Wet resistance (Contact angle with
alkali metals fluorine, and
water 110)
No impurities are eluted (ppb level or less) when in contact with chemicals Heat resistance < 90C
Heat resistance < 130C
Heat resistance < 70C
Silicone resin is inferior in solvent resistance, chemical (strong acid and strong alkali) resistance, and water resistance Silicon rubber is inferior to fluororubber in mechanical strength and solvent resistance when used as a seal member Heat resistance < 240C, PEEK is inferior to PTFE in acid resistance. PEEK is basically injection-molded, and cannot be blended with materials
Heat resistance https://www.kda1969.com/study/study_pla_compare.ht m Chemical resistance https://www.kda1969.com/study/study_pla_chem.htm List of physical properties of rubber https://www.kayocorp.co.jp/common/pdf/rub_propertylist.pdf