Check valve for use in steam generating boiler, has cylindrical element fixed with rotary control unit fixed in elevation with respect to body controlling coaxial movable rod for transmitting screwing effort to closing valve

摘要

The valve has a seat (5) installed on a product body (1) with a mechanical connection system. The system allows a cylindrical cage (6) for permitting passage of steam flow to maintain a position of the seat and a closing unit (3) guided via a cylindrical element. The cylindrical element is integrated with a closing spring (10) and fixed with a rotary control unit (13) fixed in elevation with respect to the body controlling a coaxial movable rod (12) for transmitting screwing effort to a closing valve.