Such a structure has the advantage of having a one piece body which can be moulded or machined in a single piece and the assembling of the assembly of the valve as well as its installation on {HEAD ~ a pipe} by clamping {TAIL ~ flanges} makes it possible to constitute the valve by means of simple parts without bolts or nuts 
by clamping
Such a structure has the advantage of having a one piece body which can be moulded or machined in a single piece and the assembling of the assembly of the valve as well as its installation on { HEAD ~ a pipe } by clamping { TAIL ~ flanges } makes it possible to constitute the valve by means of simple parts without bolts or nuts
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