Valve for sampling fluids flowing through a pipe - suitable for toxic or reactive polymerisation systems

• Main Author: FRANCIS CASPARD ET ALAIN STEENAKKER
• Format: Patent
• Language: English; French
• Published: 08.01.1982
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

A valve for sampling a fluid flowing through a pipe comprises a hollow stem mounted radially on a cylindrical barrel installed in line with the pipe. The stem is blanked off to seal the radial outlet until inserted sufficiently to submerge a lateral entry into the stem bore. Pref. when the stem is retracted, the end of the stem is flush with the bore profile of the barrel. The stem is shifted by e.g. a screwed collar or a rack mechanism, pref. operated electromagnetically. No system descrived for flushing the stem when in the closed (withdrawn) position. Esp. useful for sampling hazardous materials such as acrylonitrile or materials which may decompose or react in any fittings which incorporate stagnant zones, e.g. unstabillised acrylic monomers, for taking intermittent samples on line without exposing the sample. LA PRESENTE INVENTION CONCERNE UNE VANNE, POUR LIQUIDES, EN PARTICULIER POUR PRISES D'ECHANTILLONS.ELLE COMPORTE UN CONDUIT PRINCIPAL 2, UN CONDUIT SECONDAIRE 7 PERPENDICULAIRE AU CONDUIT PRINCIPAL ET UN PISTON 8 COULISSANT DANS LE CONDUIT SECONDAIRE ET MUNI D'UNE TETE D'OBTURATION 9 DU CONDUIT SECONDAIRE ET D'UN CANAL DE SORTIE SECONDAIRE 11. LEDIT PISTON EST MOBILE ENTRE UNE POSITION "REPOS" SELON LAQUELLE LA TETE D'OBTURATION FERME TOTALEMENT LE CONDUIT SECONDAIRE ET UNE POSITION "PRELEVEMENT" SELON LAQUELLE LE CANAL DE SORTIE SECONDAIRE COMMUNIQUE AVEC LE CONDUIT PRINCIPAL, PERMETTANT AINSI A UNE PARTIE DU LIQUIDE DE S'ECOULER PAR LEDIT CANAL.UTILISATION: PRELEVEMENT DE LIQUIDES TOXIQUES ETOU POLYMERISANT FACILEMENT.