Commonly used pneumatic valve sealing surface material is introduced

and soft seal material ( Ding eyes rubber ( NBR。 Ding eyes rubber oil resistance is excellent; Heat resistance is better than that of natural rubber, butylbenzene rubber; Good air tightness and water resistance. Ding eyes can be divided into butyl rubber eyes - , d eyes - And the eyes - And so on. Rubber is suitable for the temperature - phase eyes ~ + degree of petroleum products, benzene, toluene, water, acid and alkali medium.
( Fluorine rubber ( FKM。 Fluorine rubber heat, acid and alkali resistant, oil resistant, resistant to saturated water and steam, compression permanent deformation is small, good air tightness. Apply to the temperature - fluorine rubber ~ + degree of petroleum products, water, acid, alcohol.
( Ptfe ( PTFE。 Teflon high temperature resistance, chemical corrosion resistance, low friction coefficient, but low mechanical strength, creep, and elastic. It applicable temperature is equal to the degree of corrosion medium.
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hard seal material ( Copper alloy. Copper alloy in the water or steam corrosion resistance and abrasion resistance are better, suitable for PN or less. MPa, medium temperature shall not exceed the degrees, can use insert structure or overlaying welding and casting method on the ontology. Commonly used brand for ZCuAlFe ( Aluminum bronze, ZCuZnMnPb ( Casting brass.
( Chromium stainless steel. Chromium stainless steel has good corrosion resistance, is often used for water, steam and oil, medium temperature shall not exceed the degrees. Commonly used brand have Cr, Cr.
( Company is alloy. Company too hard alloy corrosion resistance. The erosion resistance and abrasion resistance and other comprehensive performance is very good, suitable for all kinds of different USES pneumatic - valve type and temperature ~ + degree of different kinds of medium, strong corrosive medium, in particular, is one of a kind of ideal sealing surface material. Company too stand alloys due to their high prices, we adopt welding.
( Nickel base alloy. Nickel-based alloy is another kind of important materials in the field of corrosion resistance, there is a commonly used for sealing surface material: monel, hartz alloy B and C hartz alloy. Monel is the main material of hydrofluoric acid corrosion resistance, suitable for temperature - ~ + degree of alkali, salt, food, without air medium acid solvent. Hartz alloy, hartz alloy C B is pneumatic valve sealing surface materials of the most comprehensive corrosion resistance of materials, apply to the temperature degrees ( Hardness of RC corrosive acid, sulfuric acid, phosphoric acid, wet gas HCI, strong oxidizing medium; At the same time, apply to the temperature degrees ( RC without chlorate solution, strong oxidizing medium.
( Iron base alloy. Iron base alloy in the developing process of the new seal face material, its abrasion resistance, scratch resistance is better than that of Cr, but also has certain corrosion resistance, can substitute for Cr. Apply to the temperature less than or equal to degree of corrosive medium. Commonly used brand have WF, WF iron base powder.