21 April, 2021-, a ball valve made of composite materials manufactured by JSC «SPLAV SPA» named after A. Ganichev» delivered to LLC «Orgsintez» for the prototype testing within a year and a half. A mixture of acids was used as a working medium used for washing containers from various chemicals. Since then, no problems have been identified with the operation of this equipment. The average service life of lined shut-off valves under such conditions is about 4-6 months.