Miele Rotary Ironer PRI 421 [EL SOM LAM IB RF] – 3 AC 400V 50-60HZ, Iron grey

113 kg of flatwork per hour at 25% residual moisture sets the PRI 421 at the top end of Miele’s marine rotary ironer range. A 365 mm roller diameter and 2,040 mm working width make this a production machine for continuous linen flows rather than a small on‑board utility ironer.

On a vessel the key constraints are deck area, electrical capacity and HVAC load. The PRI 421 occupies 2,759 x 1,441 mm on plan at a height of 1,110 mm, so the laundry needs a clear run for feeding at the front and collecting at the rear. Heat dissipation is quoted at 13.7 MJ/h, which is a material addition to the room’s sensible load and needs to sit in the air‑conditioning calculation, particularly on enclosed laundry decks. Electrical supply is 3 AC 400 V 50–60 Hz with a total connected load of 23.5 kW and 50 A fusing, making it a commitment on the ship’s distribution board that has to be coordinated with the rest of the hotel load.

The machine is built for service life and serviceability under inspection regimes. Tested operating hours are stated at 20,000, which defines its positioning in a professional laundry rather than a light‑duty hotel ironer. Leaf‑spring padding paired with an aramid needle‑felt cloth gives a resilient ironing surface that holds its shape over time, which matters when the roller is 2,040 mm wide and expected to deliver consistent contact pressure across its full length. Minimum controlled speed is 1.5 m/min and maximum 5.4 m/min, so throughput can be throttled back for delicate items or turned up when working to the 113 kg/h rating at 25% residual moisture or 67 kg/h at 50% residual moisture.

Net weight is 458 kg with a maximum floor load of 4,493 N. Those figures matter to the naval architect checking deck structure and isolators; this is not a machine to be moved once installed. Gross transport dimensions of 1,388 x 2,866 x 1,096 mm and a gross weight of 537 kg give the yard enough information for routeing through hatches and lifts. Noise is quoted at 56 dB(A) re 20 µPa, which keeps the working environment relatively quiet for operators even when the ironer is driven at higher speeds.

Build and control

• Specified for offshore installations
• Specified and approved for shipboard use
• Can be tied into a peak-load / energy management system

The electrical connection at 3 AC 400 V 50–60 Hz and 22.9 kW heater rating make this ironer suitable where a vessel has sufficient spare capacity on the hotel services switchboard and a steady volume of table linen and bedding to justify 113 kg/h of potential throughput. It is the wrong choice for a small crew‑only laundry with limited electrical headroom or for operations where flatwork volumes are intermittent, because the footprint and connected load will not be fully used. The published recycling rate of 98% is relevant where the owner has end‑of‑life and sustainability targets documented at build.

Ordered under Miele material number 11606180 (article number 53421108SOM, model PRI 421).