DESMI PUMPING TECHNOLOGY A/S P a g e | - 23 -Tagholm 19400 Nørresundby - DenmarkPhone.: +45 96 32 81 11Fax : +45 98 17 54 99E-mail: desmi@desmi.comwww.desmi.com10.2 Connecting the motor and the pumpIf you intend to use the pump in a potentially explosive environment, the pump mustbe connected to an explosion-proof motor/gearUse coupling approved by ATEXCarefully shield the coupling between the pump and motor1. Before connecting the motor and the pump, check that the pump shaft can revolve easilyand regularly.2. When connecting the motor with the pump, you must make sure that the pump shaft and themotor shaft are on precisely the same centre line and that there are a few mm between theshaft ends3. Pump types HD, CD, PD and ED must be connected to the motor by means of an elasticcoupling.4. If a ROTAN standard coupling is used, the pump and the motor are aligned as described inthe following section.Other couplings are fitted and aligned in accordance with the coupling supplier’s instructions– refer to these!10.3 Aligning the motor and the pumpIf a ROTAN standard coupling is used, the motor and the pump are aligned as follows.Other couplings are aligned in accordance with the coupling supplier’s instructions with regardto the maximum permitted tolerances for eccentricity and non-parallelism.1. Check the centring between the pump shaft and the motor shaft by means of a straightedge.Place the straightedge over the two coupling pieces 2-3 places on the circumference – 90°apart. Any misalignment will become evident in the form of a gap of light between thestraightedge and the coupling hub.2. Centring may deviate by a maximum of 0.05 mm when both halves of the coupling rotate.3. Check the parallelism/gap between the halves of the coupling, using an air gap gauge.ATEXATEXATEX
