Jesco MAGDOS LK Operating Instructions Manual

Hydraulic installationSystem piping 17© Lutz-Jesco GmbH 2015Subject to technical changes.150225BA-10221-02-V03Stepper Motor-driven Diaphragm Dosing Pump MAGDOS LK Operating Instructions8.2 System pipingn The system piping must not exert any force on the connections andvalves of the dosing pump.n This means that steel piping should be connected to the dosing pumpby means of flexible pipe sections.n The nominal diameters of the pipework and the installed fittingsshould be rated the same as or greater than the nominal diameters ofthe dosing pump‘s suction and discharge valves.n The suction line should be kept as short as possible.n You should avoid intertwined hoses.n Avoid loops, since air bubbles can collect.8.3 Aligning the dosing headabcFig. 9: Aligning the dosing headWhen connecting the dosing lines to the dosing pump, you must observethe direction of through-flow (see arrow b).The dosing head must bealigned vertically.The suction valve c must always point downwards. Accordingly, arrowb and pressure valve f always point upwards. This is irrespective ofthe positioning of the dosing head to the drive.8.4 Hydraulic connections8.4.1 Connecting hose clipsChoose the hose connection according to the condition of the hose(material, inner diameter, wall thickness) in order to ensure maximumpressure resistance.8.4.1.1 Sizes 4/6 and 6/9abcdeabcde4/6 6/9Fig. 10: Hose clips 4/6 and 6/9 (internal and external diameters in mm)Perform the following working steps:1. Cut the hose a to length neatly and at an exact right angle.2. Place a gasket that is suitable for the dosing medium between theconnection e and the valve.3. Screw the connecting piece e to the dosing pump‘s valve using theunion nut b.4. Thread the union nut c and the clamping ring d onto the hose.5. Plug the hose a all the way in to the grommet of connection piecee.6. Push the clamping ring d onto the grommet of connection piece eand screw it to the union nut c.7. Carry out the same procedure with the connection to the dosingpump‘s other valve.ü Hose clip connected.