Background. Prolonged operation of shut-off valves of main gas pipelines leads to gradual wear of the sealing elements of ball valves and valves and a violation of their tightness. Timely detection of leakage of the shut-off valves at an early stage allows you to keep the equipment in working condition and avoid the consequences caused by large volumes of gas leaks. https://sportsplazanyes.shop/product-category/mens-jackets/