Intended for use in pipeline systems, circulation systems of drilling rigs, tanks, reservoirs, tanks, gas distribution stations, etc. in the passage of crude oil, gas, oil-gas-water mixture, oil products, incl. petrols, diesel fuels. They can be installed both in the middle (section) and at the ends of pipelines, in tanks, reservoirs, tanks, gas distribution stations as shut-off devices, which do not require special maintenance. Available: uncoated, coated with C5M, coated with second coat, coated with ceramic. Gaskets: rubber compounds, silicone compounds, recyclable silicone, vtorosilicon. We deliver from stock or manufacture to order. Individual execution and kitting are possible.