Miele Rotary Ironer PRI 318 [EL SOM LAM IB RF] – 3N AC 400V 50-60HZ, Iron grey

A 300 mm roller and 1,750 mm working width put the PRI 318 into the higher-throughput class of rotary ironers. At 25% residual moisture it is rated for up to 87 kg/h; even at 50% residual moisture it still delivers 51 kg/h. Those figures matter for a shipboard laundry trying to clear bed linen and tablecloths within one watch.

The machine is specified and approved for shipboard use and for offshore installations, so the electrical and mechanical design fits into the constraints of a marine plant room rather than a shore-based laundry. Supply is 3N AC 400 V 50–60 Hz, which aligns with the common 400 V marine distribution standard and avoids the need for step-up or step-down transformers. With a total connected load of 18.3 kW and a fuse rating of 35 A, the ironer has to be planned into the vessel’s energy balance; the ability to tie it into a peak-load or energy management system helps the chief engineer keep switchboard demand within limits when other heavy users are running.

Externally the PRI 318 stands 1,110 mm high, 2,469 mm wide and 1,377 mm deep, with an iron grey outer casing. Laundry infeed is at the front and outfeed at the back, so the laundry flow and access routes need to be laid out around a through-feed pattern rather than single-sided working. Net weight is 415 kg and the maximum floor load is 4,071 N, giving the data a naval architect or yard needs to check deck structure and foundations. Gross dimensions of 1,388 x 2,576 x 1,096 mm and a gross weight of 492 kg are relevant where delivery routes and lifts are tight.

The ironing speed is controlled between 1.2 and 4.6 m/min. That band allows the operator to slow the roller for heavier terry or work at the upper end of the range to clear flatwork when the backlog is high. Heat dissipation into the room is quoted as 10.8 MJ/h, so the ship’s HVAC design needs to treat this ironer as a significant sensible load in a closed laundry. Emission sound pressure level at the workplace is 56 dB(A) re 20 µPa, which is relatively low for a machine in continuous motion and helps with noise exposure where the laundry is adjacent to accommodation.

The PRI 318 is built for long service, with tested operating hours of 20,000 and a recycling rate of 98%. Heating is electric, with an electric heater rating of 17 kW. The control system is via a touch display that permits setting of defined programme parameters, so standardising finishing quality across shifts is straightforward once the parameters are agreed.

Build and control

• Laundry infeed at the front, laundry outfeed at the back
• Touch display control system
• Setting of defined programme parameters
• Electric heating with 17 kW heater rating
• 3N AC 400 V 50–60 Hz electrical connection
• Leaf-spring padding
• ARAMID needle-felt cloth ironer cover
• Specified for offshore installations
• Specified and approved for shipboard use
• Can be tied into a peak-load / energy management system

This model suits medium to large vessels that need continuous rotary ironing capacity without stepping up to the very largest roller diameters or widths. It is the wrong choice for a small crew vessel where space does not allow a 2,469 mm-wide through-feed machine or where finishing is handled on simple dryers and hand irons. Ordered under Miele article number 53318109SOM / material number 11607870.