adjacent to it with a coating of a sealant which forms the seal toward the outside of the valve preventing fluid from leaking and also forms the seal within the valve which regulates fluid flow application_number US 58436790 A description reference is first made to fig1 illustrating a ball valve of the prior art in fig1 the entire valve 1 which comprises a valve housing 2 and a ball stopper 3 is illustrated in the valve housing 2 the housing seat of stopper 3 is indicated as 4 while 5 and 6 designate the inlet connection and outlet connection of the fluid flowing in the direction of arrow f the neck portion 7 which accommodates the annular groove 8 housing a seeger ring 9 or similar component for the position adjustment of the stopper 3 the stopper 3 is controlled by a handle 10 and an intermediate control rod 11 this houses an 0 ring gasket 12 providing the seal preventing the fluid from escaping toward the outside the stopper 3 is tightly closed between two other gaskets 13 14 housed in corresponding seats provided in valve housing 2 at this point the basic structure of the valves of the prior art which have been described is one with the valve housing 2 in a single piece reference is now made to the embodiments of the present invention illustrated in fig1 12 illustrated for ease of comprehension in different scales in which equivalent parts are indicated with the same reference numbers the valve considered as the whole is indicated by 20 in fig1 this valve assembly 20 includes a valve housing 21 fig2 which has a construction similar to the valves of the prior art two flat seats 25 and 26 opposite and parallel are found in.