valve with an inner behaelterdruck implication rules.

摘要

1. Valve of the double effect type adapted to be interposed between two media (7, 7') which are capable of relative variations in pressure, the valve ensuring isolation of the two media (7, 7') with respect to each other below a relative pressure difference corresponding to a determined threshold, the valve ensuring, on the contrary, the communication between the two media (7, 7') beyond a pressure difference exceeding said threshold, of the type comprising a sheet (1) of elastically deformable material, provided with a slot (5), each face (2, 2') of the sheet (1) being in communication with one of the two media (7, 7'), the deformation of the sheet (1) under the effect of the pressure difference between the two faces, beyond a certain value, causing opening of the slot (5) and communication of the two media (7, 7'), characterized on the one hand in that it is constituted by a valve body forming sleeve (10) inserted, with interposition of sealing means (12), in a slot of corresponding format and made in the wall separating the two media, the elastically deformable sheet or membrane (1) being placed in position transversely inside said valve body (10), this membrane being imprisoned by its periphery between two shoulders such as rings (3, 4) forming a holding frame blocking the circular perimeter of the membrane, and connected inside the bore of the sleeve (10), and, on the other hand in that it comprises a plurality of adjusting members (16, 16', 16", 17, 17', 17", 18, 18', 18") bearing on one face of the membrane at least at the level of slot (5) and adapted to reduce the active length of said slot of which part is adjusted blocked by said adjusting members, said latter being provided to be removable and the removal of one or more adjusting members making it possible to adjust the freedom of movement of the membrane and the threshold of response and of opening of the latter at the pressure differences.