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 a pipe by clamping flanges makes it possible to constitute the valve by means of {HEAD ~ simple parts} without bolts or {TAIL ~ nuts} 
without
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 a pipe by clamping flanges makes it possible to constitute the valve by means of { HEAD ~ simple parts } without bolts or { TAIL ~ nuts }
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