ZMH Series

John Crane’s Metastream® ZMH Series is specifically designed for the humid and corrosive atmosphere of a cooling tower, with its lightweight filament wound composite spacer tube, stainless steel pre-assembled packs, stainless steel hubs and hardware. The coupling provides a strong level of angular, lateral and axial misalignment, while maintaining a high level of balance integrity. In the unlikely event of membrane (disc) failure due to a torque overload or excessive misalignment, the coupling will disconnect the drive and run on the safety bush in the pre-assembled packs, permitting the driven machine to safely come to rest without further damage to the equipment. With the ZMH design disconnecting the drive once an upset condition has occurred this will alert you to an issue with your equipment, which will help prevent costly and time-consuming fixes to the coupling, fan blade, and cooling tower. Due to the pre-assembled packs on the ZMH, replacing the damaged part is quickly done with minimum costs.