CLAPET ANTI-RETOUR ETANCHEITE METAL/METAL OU METAL/CAOUTCHOUC NON-RETURN VALVES METAL/METAL OR METAL/RUBBER DESIGNATION Les clapets anti-retour Duff Norton Europe empechent I'inversion du debit dans un circuit ou protegent des surpressions qui peuvent se produire a certains endroits d'un circuit. Le clapet guide peut etre ou non equipe d'un joint en caoutchouc synthetique qui le rend totalement etanche sur circuit eau, gaz, air comprime, etc. TARAUDAGE - ref. 4000 KM : BSPP-F/F - DN 1/4" a 2" (BSPP) - ref. 4100 KM : NPT-F/F - DN 1/4" a 2" (Briggs) PRESSION DE SERVICE Voir tableau DEscRIpTIoN - 4000 KM : acier traite nickel chimique, taraudage BSPP - 4100 KM : acier traite nickel chimique, taraudage NPT - 4000 IM : acier inox 316 L, taraudage BSPP - 4100 IM : acier inox 316 L, taraudage NPT RESSORT Acier inox pour tous les modeles ETANCHEITE STANDARD METAL/METAL, sur demande, clapet avec joint NITRILE, *VITON®, E.P.D.M, etc... (ajouter EC apres M, KM ou I). Standard en *VITON®. Exemple : 4021 KMEC 0,5 bar. TARAGE STANDARD 0,5 bar circuit d'aspiration. Autres tarages sur demande, de 0,1 bar a 10 bar. 4,5 bar circuit de refoulement. Pour EC tarage maxi 0,5 bar. DESIGNATION Duff Norton Europe non return valve for low or high pressure hydraulic circuits prevents reversal of the flow in a circuit or protects the circuit against overpressure. The guided plug can be equipped with a synthetic rubber seal which gives it a complete tightness to water, gas, compressed air. TAppING -ref 4000 KM BSPP-F/F - 0 from 1/4" to 2" -ref 4100 KM NPT-F/F - 0 from 1/4" to 2" WORKING PRESSURE See table DESCRIPTION Body -4000 KM: chemical nickel plated steel, BSPP tapping -4100 KM: chemical nickel plated steel, NPT tapping -4000 IM: stainless steel 316L, BSPP tapping -4100 IM: stainless steel 316L, NPT tapping SPRING Stainless steel on all models TIGHTNESS METAL/METAL. On request, plug with seal, NITRILE, *VITON®, E.P.D.M. (Add EC to the reference after KM or I). Standard: *VITON®. For example: 4021 KMEC 0.5 bar STANDARD CALIBRATION 0.5 bar for vacuum ciruits. 4.5 bars for reversing circuits. Other calibration on request, from 0.1 to 10 bars. For EC max calibration is 0.5 bar.