Equipment for hazardous areas from jbj Techniques Limited

7 This guide is for the installation of JXL couplings when a bellhousing is used. Coupling pins are tightened to the correct torque prior to leaving our premises; these values should be re-checked prior to installation. Under no circumstances should the couplings be assembled with the pins tightened to any torque other than the specified values. Fit the relevant coupling hub onto the motor shaft. As a general rule the face of the coupling flange will be flush with the end of the motor shaft with any necessary offset being applied to the hub fitted to the pump shaft. In any case the correct setting distance must be maintained, tighten grub screw(s) and re- check the setting distance. Fit the pump centring to the pump (when supplied) then fit the relevant coupling hub to the pump shaft, position the hub suitably to obtain the correct setting distance, tighten grub screw(s) or clamp screw(s) if the pump has a spline shaft, and re-check the setting distance. When the coupling assembly is to be mounted in a vertical position, we strongly recommend the use of the additional grub screw positioned at 90 degrees to the key slot, to reduce the risk of the coupling hubs creeping down the shafts. If the additional grub screw is not to be used it must be removed from the coupling hub. Assemble the pump and motor to the bell housing ensuring that there is no loose matter i.e. grub screws washers etc remaining inside the housing and that no rotating component is within 5.0mm of any non rotating part. Tighten all bolts to the correct torque values. We recommend the use of shake proof washers with all bolts. Tightening Torques for JXL Couplings Maintenance Axial Misalignment All couplings plus or minus 50% of flange gap (dimension C) setting distance. Periodically check flange alignment and resilient elements for wear. We recommend the resilient elements are inspected on an annual basis. Worn elements must be replaced. Misalignment must be rectified. Inspection and maintenance is the responsibility of the end user. Note All JXL couplings are capable of accepting a momentary overload of twice nominal torque and have an operating temperature range of -50°C to +105°C. TX note During operation bellhousings and JXL couplings do not generate heat therefore operational surface temperature will depend on the temperature of mating components and surroundings. Refer to BS EN 13463:1 9.3.2 f) Equipment ‘T’ class or maximum temperature (T max) to be determined by machine builder. Hazardous Area Bellhousings / JXL Installation