H4SV-20-C advise our customers with an eye on their individu Helical gear box H4

Flender/Flender Gear Units/Helical gear box H4

filled with oil from the suction line because of the reduced pressure. The filled tooth spaces firmly enclosed by the housing run into the pressure zone where they are discharged by the meshing of the teeth. The power ratings of the assigned motors have been adapted to maximum operating viscosity of 5 cSt (see motor data on page . pressure relief valve set to an opening pressure of 8 bar is integrated into the pumps which serves for protecting the system. The disk springs in the pressure relief valve keep the valve closed against the oil pressure until the pressure builds up to such an extent that it overthrows the spring force, moves the valve body, and cross sectional area opens. Technical data of pump: Operating temperature: max. 1 Operating pressure: max. 2 bar Manometric suction pressure: max. -0.6 bar Pump materials: Housing: Grey cast iron GG2 Shafts for system sizes 0 - 0: 4 Cr Mo S4 for system sizes 0 - 1: 1 Mn Cr S5 or 4 Cr Ni Mo 6 Gears for system sizes 0 - 0: 4 Cr Mo S4 for system sizes 0 - 1: Nodular graphite cast iron GGG 4 Bearing bushes: Multilayer metal jour- nal bearing out of PTFE (bronze parti-cles embedded) Shaft seals: Viton Technical data of pressure relief valve: Operating temperature: max. 1 Operating pressure: max. 2 bar Pressure relief valve materials: Housing: Grey cast iron GG 2 Valve cone: 1 Mn Cr S5 Threaded bush: Grey cast iron or Steel Counter nut: Grey cast iron or Steel -rings: VitonGroupe de pompage, de rf.-pice 1, 1 selon norme-usine Flender 5 Nous employons des pompes engrenages vanne intgre limitatrice de pression. Leffet refoulant de cette pompe est engendr par lengrnement des dentures lune dans lautre. Lorsque les deux engrenages tournent, les dents situes du ct aspiration dgagent des inter dents qui, en raison de la dpression engendre, se remplissent immdiatement avec lhuile arrivant par la conduite daspiration. Les inter- dents remplis tournent, envelopps par le carter de pompe et la pice intermdiaire. Ils a