VARISCO V Series Instructions For The Installation, Use And Maintenance

Also see for V 100-2: Operating manual Operating manual Instructions for the use and maintenance

Contents

VARISCO V Series Instructions For The Installation, Use And Maintenance Manual pdf 9 page image

910.3 Mechanical shaft sealIf the pump has a reservoir for quench liquid (such as option +O2), check that thelevel of liquids is approximately 3/4 of the reservoir volume. The liquid in the reser-voir must be compatible with the pumped liquid. Unless otherwise specified, theshaft seal gaskets are PTFE.10.4 Axial rotor adjustmentAfter many hours of operation, the clearance between the rotor and cover can increase causing loss of capacity and pressure. It is possi-ble to take up part of the clearance by adjusting the lock rings which fix the eternal ball bearing.To adjust the lock rings, use a prong spanner.❑ Loosen the security dowels.❑ Loosen the internal lock ring❑ Tighten the outer lock ring as far as it will go.❑ Loosen the outer lock ring as shown in the table below.❑ Tighten the inner lock ring and fix the security dowels.Note: In the models V 120-2, V 150-2, V 151 and V 200only the internal lock ring is fixed and the following twooperations should be carried out:❑ Loosen the outer lock ring by 1/8 of a turn❑ Fix the security dowel ( models V25-2 and V30-2 do nothave security dowels).10.5 Regulation of the by-pass relief valve(Example of setting not 8 bar)The by-pass must be set with the pump in operation❑ Unscrew the cap❑ Loosen the lock nut (if fitted).❑ Tighten the regulation screw almost as far as it will go (turn the screw clockwise to load the spring).❑ Adjust the delivery valve of the piping system until the pressure gauge reading on the deliveryside is the required setting (in our exam-ple, 8 bar).❑ Loosen the regulation screw (turn it anticlockwise to unload the spring) until the pressure gauge reading starts to fall below the setting(eg 8 bar).❑ At this point, the by-pass is set and the delivery valve can be opened to let the system operate normally.❑ To reset the by-pass to a higher or lower pressure, follow the same procedure.❑ When the spring is not compressed, the regulation screw can be freely unscrewed. It is not advisable to unscrew any further.Attention: It is essential to use caution when working with inflammable or corrosive liquids.11 DISASSEMBLYIf the pump is under warranty, do not disassemble without consulting the manifacturers or their authorized representative. If this is notobserved, warranty will not apply.Before opening the pump, ensure that:❑ the liquid inside is not under pressure❑ if liquefied gas is being pumped, that all the gas has been vented❑ if not liquids are being handled, that the liquid has cooled.For large, heavy pumps (eg V 100-2, V 120-2, V 151, V 150-2, V 180 and V200) adequate hoisting equipment is necessary to handle thecomponents.Ensure that machined surface are protected before hoisting or moving with cables or other devices.Do not use water to clean the pump and its components. If this is inevitable, dry carefully and coat will oil.option+O2fig. 8inner bearing coverouter bearing cover.K pumps andPacked glandClass 2Class 3Viscosityup to 600 cSt and up to 180 deg C (1)from 600 to 6000 cSt and up to 180 deg CClass 3OthersClass 1Class 2Class 3 over 6000 cSt and over 180 deg CPump typeClass1 1/80,187V25-2V30-21/40,371/30,51/80,25V50-3V60-2V70-2V80-21/40,51/30,71/60,3V85-21/30,7—1/40,5V90-2V100-21/21,0V120-2V150-2V1513/41,5V180V200231/40,51/30,71/30,73/321/30,72/31,5Note: The upper figure is the fraction of a turn of the outer lock ringwhile the lower figure is the corresponding distance in mm between therotor and cover.fig. 9