Official recall record

Diferro calenders sublimation calender press dp series mp series dm series

What the authority reported

Sublimation calender presses within the scope of the corrective action have been identified as presenting a serious risk of explosion and fire. Two catastrophic Boiling Liquid Expanding Vapour Explosion (BLEVE) incidents have now occurred involving Diferro machines. Evidence suggests that in both cases the machines had been left unattended and connected to the electrical power supply and that uncovenanted and uncontrolled heating of the oil-filled drum has occurred. The built-in temperature control system has then also failed to operate to prevent overheating and over-pressurisation of the sealed drum (roller). No external source of heat has been present to cause the overheating of the oil-filled drum. There is potential for system control failure to result in unplanned uncontrolled heating of the oil-filled drum at any time when the machine is connected to the electrical power supply, including when left in standby mode after the normal cool-down cycle has completed and when using weekly programme function (timer mode). If the machine is unattended when this occurs failure to promptly shut down and isolate from the power supply may result in overheating and catastrophic failure of the drum and a BLEVE. The potential explosion and any subsequent fire is likely to cause catastrophic damage to the building and its surroundings, with potential for multiple fatalities and significant property destruction. The original Programmable Logic Controller (PLC) within the control system of these calender presses does not meet any required safety performance level. There is no independent secondary temperature monitoring and control system. The product does not meet the requirements of the Supply of Machinery (Safety) Regulations 2008.

What to do

Follow the instructions in the official notice — recall remedies (refund, repair, replacement, or disposal) are defined by the issuing authority and the responsible business, and they differ per recall. Do not rely on summaries, including this one.

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