Pressure relief valve

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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F16K 17/04 (2006.01) F16K 1/44 (2006.01)

Patent

CA 2634960

A pressure relief valve for blown fibre closures is provided having constituent components fabricated from plastic. An adaptor (101) is provided for connection to a blown fibre closure, and a body (104), welded to this adaptor (101), is provided to enclose a piston (102) and a spring (103) within, such that they are protected from the ingress of silt and water. The piston (101) is arranged to provide a double seal such that a pressure relief valve plug (208) and an opening (213) in the enclosing body (104) are closed or opened simultaneously to prevent the ingress of silt and/or water on the one hand and the unhindered escape of pressurized fluid on the other.

Soupape de décharge pour enceintes en fibres soufflées, dont les composants constitutifs sont façonnés à partir de plastique. Un adaptateur (101) est installé en vue du branchement sur une enceinte en fibres soufflée et un corps (104), soudé à cet adaptateur (101), est aménagé pour contenir un piston (102) et un ressort (103), de telle sorte qu'ils soient protégés de l'irruption de vase et d'eau. Le piston (101) est agencé de façon à assurer une double étanchéité de telle sorte qu'un bouchon (208) de soupape de décharge et une ouverture (213) dans le corps (104) qui l'entoure soient fermés ou ouverts simultanément pour empêcher l'irruption de vase et / ou d'eau d'une part et l'échappement sans entrave du fluide sous pression d'autre part.

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