Swivelling check valves (valves) KOP with nominal diameters (nominal bore) from DN 50 to DN 1200 for nominal pressures up to PN 40 MPa (400 kgf/cm2) inclusive, designed for automatic prevention of reverse flow of working medium on pipelines for water, steam, hydrocarbons, their mixtures, as well as other working media, in relation to which the materials of the main parts of the valves are corrosion-resistant, with operating temperature up to +560°C depending on material versions and parameters of the working medium.
Valves (hereinafter also referred to as "products") are designed for operation in areas with temperate and cold climates in the versions "U", "XL" and "UHL", respectively, placement category "1" according to GOST 15150.
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