Miele Rotary Ironer PRI 421 [EL SOM LAM IB RF] – 3 AC 450V 50-60HZ, Iron grey

A 365 mm roller working across 2,040 mm of width gives the Miele PRI 421 the bed size needed for large sheets and table linen. At 25 % residual moisture the ironer is rated at 113 kg/h, and at 50 % residual moisture it still delivers 67 kg/h, which is the figure most laundries plan against when feeding mixed cabin and hotel linen.

In a ship’s laundry those throughput numbers sit alongside deck area, power and HVAC capacity. The PRI 421 stands 1,110 mm high, 2,759 mm wide and 1,441 mm deep, so the space has to allow a straight, clear run and safe working areas along that footprint. Heat dissipation is specified at 13.7 MJ/h; in a closed laundry this becomes a defined load on the ventilation and air‑conditioning system rather than background heat. Sound pressure at the workplace is quoted at 56 dB(A) re 20 µPa, which is low enough not to dominate a space where several machines are running.

The construction type is front infeed and rear outfeed, so linen is always collected behind the machine. That means the room layout must give the back of the ironer the same attention as the front, whether for manual collection or for a downstream folding point. Minimum ironing speed is 1.5 m/min and maximum is 5.4 m/min; within that band the operator can trade cycle time against finish quality and staff availability. Tested operating hours are given as 20,000, which allows a superintendent to align preventive maintenance and replacement planning with an expected service life under continuous operation.

Electrically, the PRI 421 is an electric‑heated machine with a heater rating of 22.9 kW and a total connected load of 23.5 kW. The electrical connection is 3 AC 440 V 50–60 Hz with a 50 A fuse rating, matching the common 440 V marine distribution without intermediate conversion. Net weight is 458 kg, gross weight 537 kg, and maximum floor load 4,493 N, so the deck structure and any raised floor or plinth should be checked against these point loads during design. The recycling rate is stated at 98 %, which matters where the vessel works to a recycling specification at end of life.

On the finishing side, the ironing surface is built on leaf‑spring padding covered with an ARAMID needle‑felt cloth. That combination supports consistent contact pressure and temperature transfer across the full 2,040 mm working width. Control is via a touch display with defined programme parameter settings, so once the correct parameters are established for a given linen mix, they can be stored and recalled without drift between shifts.

Build and control

• Specified for offshore installations
• Specified and approved for shipboard use
• Can be tied into a peak-load / energy management system
• Touch display control system
• Programme setting via defined parameters
• Electric heating with 22.9 kW heater rating
• Leaf-spring padding with ARAMID needle-felt cloth

This ironer is a strong fit for larger cruise, ferry or offshore units that genuinely need up to 113 kg/h at 25 % residual moisture and have the depth and power for a 2,759 mm wide, 1,441 mm deep, 23.5 kW machine. It is the wrong choice for a small crew vessel or a laundry that cannot dedicate front and rear working space; those installations should be looking at narrower, lower‑throughput ironers that fit the room and staffing pattern. Ordered under Miele material number 11606190 with article number 53421106SOM, model PRI 421.