VARISCO M Series Instructions For Use And Maintenance Manual

VARISCO M Series Instructions For Use And Maintenance Manual Manual pdf 11 page image

Varisco S.p.A.Z.I. Nord - Terza Strada, 9 - 35129 PADOVA – ITALYTel.+39.049.8294111 Email: export@variscospa.comFax+39.049.8076762 Web: www.variscospa.com11Therefore, during assembly, it is necessary to be careful not to move excessively the axis of thehollow shaft. Oil the male shaft of the motor/converter, place it so that its key is in line with thecorrispondant bore.Engage the propeller shaft until the two flanges (the motor’s and the pump’s) were connect. Thenturn the motor/converter until the bolts holes of the flanges coincide. Let the pump shaft hit themotor shaft and tighten the grub screw (line it up with the cavity set it up on the gearmotor shaft).6.1.2.2 BEARING HOUSING VERSION(WITH ELASTIC JOINT)Insert the half-joints (or pulleys, if belt drive is employed) at the ends of the shaft without using ahammer or other tools which may damage parts inside the support. For assembly, use the threadedhole on the end of the shaft.The accurate alignment of motor and the male shaft of the pump is an essential condition for aproper operation.If the pump is delivered completed, the alignment has already been carried out at the factory.Nonetheless, it is possible that during the positioning on the floor a misalignment may occur,therefore it is necessary to remove the joint cover and check its alignment by means of a rulerbefore startup. If the foundation is not properly leveled, the base may buckle. The tolerances usuallyallowed in joints used by the company are:• Allowed radial variation = 1%• Allowed angular variation = 1°6.1.3 DIRECTION OF ROTATIONThe direction of pump rotation is shown on the label pump and described on the orderconfirmation.The direction of pump rotation sets the direction of the flow through the progressing cavity pump.Any different setup must be agreed with the supplier and approved by the same.By changing the direction of pump rotation, the product flow reverses.If the pump turns clockwise, seen from the motor side, it intakes from the orifice at the end anddelivers from the middle one; if the pump turns counterclockwise it intakes from the middle orificeand delivers from the one at the end (see below).Usually, the pump can work in both directions, be it mounted with packing or with a mechanicalseal (unless it uses omokinetic joints which allow just one direction).It is advisable, though, to use the pump turning counterclockwise to prevent that the packing rings(or the mechanical seal) or other parts were subject to high pressure that could be difficult tomonitor.The pumps with a mechanical seal, though reversing, shall always turn in the direction indicated onthe pump label.This direction of rotation shall be preset upon the order while the seal assembled shall be preset atthe factory.