2 www.jbj.co.uk/couplings.html #DriveLineHarmony up to 110°C 160°C FPM NBR ATEX up to 85°C 110°C ex 1) With transmitter up to 85°C NBR 160 °C + EOC transmitter (125°C) Thermal switching equipment By adding thermal switching equipment leakage and loss of the hydraulic fluid as well as a risk to and contamination of the environment in the event that the coupling overheats can be avoided. 2 • Shaft and hollow shaft: Steel with a yield point higher than 400 N/mm . If the set temperature is exceeded, the switching pin is released from the fusible element, emerges 10 mm from the housing and actuates the switchgear while the coupling is rotating. The switchgear can cut out the drive motor and/or trigger an optical or acoustic alarm signal. The housing of the coupling remains closed and no operating fluid will escape. Fusible safety plugs The thermal switching equipment does not work if amachine side is blocked and the coupling housing is connected to this side. If the coupling is stationary, the • Blade wheel and housing: Cast aluminumAlSi10Mg orAlSi9Mg. •Add-on parts: Grey cast iron EN-GJL-250, spheroidal graphite cast iron EN-GJS-400 or steel. NBR up to 85°C 140 °C Materials If a FLUDEX coupling is operated with an impermissibly high slip for a prolonged period, the oil filling and the coupling housing will overheat. Fusible safety plugs which release the oil filling into the environment upon reaching a preset temperature are therefore fitted in each coupling housing. These protect the coupling from irreparable damage through overheating or over-pressure and disconnect the drivemotor from the drivenmachine. Equipment Suitability for coupling continuous operating temperatures Fusible safety plug Sealingmaterials FPM NBR 1) With thermal switch up to 85°C 140°C + thermal switch 110°C • Static seals and radial shaft seals: Perbunan NBR or Viton FPM. FPM NBR up to 85°C 110 °C Standard FPM FPM up to 110°C 160°C + thermal switch 140°C FPM up to 110°C FPM switching pin cannot actuate the switching equipment. The thermal switching equipment comprises the thermal switch and the switchgear. The switchgear comprises a limit switch with a make-and-break contact and a swivelling cam. Limit switch and cam are mounted on a common base plate. The thermal switch is screwed into the housing in place of a screw plug. The fusible safety plug (with a higher response temperature) remains in the coupling for additional safety. Continuous operating temperature Thermal switch Fusible safety plug ≤ 85 °C 110 °C 140 °C > 85 ° ... 110 °C 140 °C 160 °C 5 R G_MD10_EN_00108 Striking area Switchgear Thermal switch Introduction ® Fludex Fluid Couplings
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