5 www.jbj.co.uk/couplings.html #DriveLineHarmony Introduction ® Fludex Fluid Couplings Off Starting Continuous operation G_MD10_EN_00115 Operation of the delay chamber To select the operating oil for low temperatures, ensure that the pour point of the oil is sufficiently low and that it is compatible with the sealing elements. The temperature limits of the N-EUPEX add-on coupling are shown in part 7 of this catalogue. If other displacement couplings are combined with a FLUDEX coupling, their respective temperature limits must be taken into account. For use at temperatures below -20 °C, FLUDEX couplings are generally delivered without oil filling. For use at temperatures below -15 °C, FLUDEX couplings are exclusively delivered with NBR seals (Perbunan). Balancing is a two-level balancing with the specified oil quantity or a 75%filling. FLUDEX couplings can be delivered with or without oil filling. Starting torque can be reduced without increasing continuous operating slip by using a type of coupling with a delay chamber. On these couplings part of the oil filling is initially stored inactively in the delay chamber. The starting torque is considerably reduced because of the thus reduced starting filling in the working chamber of the coupling. The filling in the delay chamber runs very slowly, mostly only at the finish of the starting operation, from the delay chamber into the working chamber, causing the active filling in it to rise gradually and the continuous operating slip to reach a value corresponding to the whole filling. Technical Specifications Balancing FLUDEX couplings In deviation from the balancing specifications in Chapter E, all FLUDEX couplings complying with DIN ISO 21940 are balanced to balancing quality G6.3 for 1800 rpm. For operating speeds higher than 1800 rpmmicro-balancing, based on operating speed, can be requested. FLUDEX couplings are balanced in accordance with the half parallel key standard. Other balancing standards must be specified in the order. Add-on couplings are subject to the standards as set out in Chapter E. Oil filling » Delivery without oil filling. » Delivery with oil filling. » Delivery without oil filling but with oil filling quantity specification in litres. Hollowshafts of the FA, FGand FV series Variant of FLUDEX hollow shafts only with finished bore. Operating temperature range of FLUDEX couplings FLUDEX couplings are suitable for ambient temperatures of between -40 °C and +40 °C.
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