Valves are commonly manufactured using materials such as stainless steel, brass, cast iron, and others. However, upon closer inspection, one finds that the bolts used in these valves are almost invariably made of stainless steel. If you look carefully, you will notice numbers inscribed on them—such as 4.6, 4.8, 5.6, 6.8, and so on. Why are these numbers present, and what significance do they hold?
In the realm of industrial sealing solutions, two elastomeric materials frequently employed are Nitrile Butadiene Rubber (NBR) and Ethylene Propylene Diene Monomer (EPDM). While both NBR and EPDM exhibit excellent sealing properties, they possess distinct characteristics that make them suitable for different applications.
PTFE Film is a high-performance film material based on polytetrafluoroethylene resin, made by molding, turning or blow molding. It is widely used in high-end industrial fields such as electrical insulation, sealing, anti-corrosion lining, etc., and is known as the "King of Plastics" for its excellent performance.
Non-asbestos gaskets are composite materials made from various organic fibers (such as aramid fibers and cellulose fibers), inorganic fibers (such as glass fibers and mineral fibers), synthetic rubbers (such as nitrile rubber and EPDM rubber), and fillers, through a precision manufacturing process. They are designed to mimic or even surpass the physical and chemical properties of asbestos gaskets, while being completely free of asbestos.
Non-asbestos gaskets are composite materials made from various organic fibers (such as aramid fibers and cellulose fibers), inorganic fibers (such as glass fibers and mineral fibers), synthetic rubbers (such as nitrile rubber and EPDM rubber), and fillers, through a precision manufacturing process. They are designed to mimic or even surpass the physical and chemical properties of asbestos gaskets, while being completely free of asbestos.
Stainless steel valves are widely used industrial components, primarily applied in sectors such as machinery, environmental protection, petrochemicals, chemicals, and urban construction. Specifically: stainless steel ball valves are mainly used in the petroleum, chemical, and metallurgical industries; stainless steel butterfly valves are predominantly found in petrochemical and metallurgical applications; stainless steel check valves are primarily utilized in metallurgy, chemicals, and petrochemicals;
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