usually refers to static seal between two stationary seal face. Sealing method is mainly used washer.

Gasket material

(1) non-metallic materials: such as paper, flax, leather, asbestos, plastics, rubber and so on.

Paper, hemp, leather and the like, have pores, easy to penetrate, to be impregnated with oil, wax or other impermeable material. General valve rarely used.

Asbestos products, there are asbestos tape, rope, asbestos rubber board and so on. Which asbestos rubber sheet, dense structure, good pressure resistance, heat resistance is also very good, and the valve in the valve itself and the pipe flange connection, is widely used.

Plastic products have a good corrosion resistance, the use of more common.

Rubber products, soft, all kinds of rubber were certain acid, alkali, oil, water-resistant ability.

(2) Metal material: Generally speaking, metal materials, high strength, heat resistance and strong. But does not this lead, only to take it resistant to dilute sulfuric acid properties. Common varieties of brass, copper, aluminum, mild steel, stainless steel, Model alloy, silver and nickel.

(3) Composite materials: for example, metal covers (internal asbestos) washer, wave washer combination, wound gaskets.
 



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