In garments, the steam goes to the ironing boards, presses, form and tunnel finishers. The consumption per machine is small (3–5 kg/h for an ironing board), but the total grows rapidly as the numbers increase. Two things determine the capacity of the ironing steam boiler: the share of the machine that draws steam at the same time (70% ≈ for tables and presses) and the desired 5–6 bar g of dry steam at the machine inlet. The Çiftel Kazan wizard collects the consumption of each machine based on the manufacturer’s data, applies the concurrency and gives the boiler capacity and pressure for your workshop.
Which machine draws how much steam?
| Machine | Typical capacity | Steam | Pressure |
|---|---|---|---|
| Steam ironing board + iron | 1 table | 4 kg/h (3–5); 0.7 × in the group | 5–6 bar g |
| General ironing press | 1 press | 15 kg/h; 0.7 × in the group | 5 bar g |
| Double leg trouser press | 1 press | 32 kg/h | 5–6 bar g |
| Topper | 1 piece | 16 kg/h (12–20) | 5 bar g |
| Jacket / dress finisher | 1 piece | 23 kg/h | 5 bar g |
| Multi-form finisher | 1 piece | 27.5 kg/h (25–30); 0.8 × in the group | 5 bar g |
| Traditional form finisher | 1 piece | 16.5 kg/h (15–18) | 5 bar g |
| Shirt finisher | 40–80 shirts/h | 20 kg/h | 6 bar g |
| Tunnel finisher | 1,000 / 1,600 / 1,900 / 2,200 pcs/h | 140 / 255 / 370 / 485 kg/h | 6 bar g (5–8) |
| Denim / garment washing | 200 kg/batch, 4 hot baths | peak 579 kg/h · batch 386 kg | 5 bar g |
Example: Garment for 200-400 people
The “Medium garment” template in the wizard: a garment facility that works in one shift, with tables, presses and two multi-form finishers in the ironing department.
| Machine | Quantity | One machine | Simultaneous load |
|---|---|---|---|
| Steam ironing board + iron | 40 | 4 kg/h | 112 kg/h (× 0.7) |
| General ironing press | 6 | 15 kg/h | 63 kg/h (× 0.7) |
| Multi-form finisher | 2 | 27.5 kg/h | 44 kg/h (× 0.8) |
- Simultaneous steam requirement: 219 kg/h (flat sum of machine values 305 kg/h).
- Line losses (5%) +11 kg/h, growth margin (10%) +23 kg/h → 253 kg/h. No deaerator of this size is required; the condensate return is 30%, because the sprayed steam goes to the clothing and the environment.
- Recommended capacity: 0.3 t/h (300 kg/h), working pressure ≥ 7 bar g (8 bar design class).
- Thermal power 185 kW ≈ 159,000 kcal/h; natural gas ≈ 21 Sm³/h at full load.
- Other templates: small workshop with 8 tables, 1 press and 1 topper 44 kg/h → 0.1 t/h; Export plant with 80 tables, 12 presses, 4 form finishers and 1,900 pcs/h tunnel finishers 808 kg/h → 1 t/h (≥ 7.5 bar g).
Iron steam boiler type and pressure
Ironing boards and presses require 5–6 bar g of dry saturated steam at the machine inlet, the tunnel finisher requires 5–8 bar g. Therefore, the boiler is operated at 7–7.5 bar g and selected in the 8 bar class. Wet steam causes stains and shine on the fabric; a separator should be placed on the main line and a separate steam trap should be placed on each machine, and long lines should be insulated. If there is a denim or garment wash in the same facility, the load increases rapidly: A single 200 kg washing machine draws 579 kg/h of peak steam, that is, two and a half times the total requirement of the 40-table ironing section in the example.
Compact steam generators are common in small workshops of 100 kg/h that feed a single ironing section. In the case of multiple sections, tunnel finishers, washing lines or central boiler rooms, the Çiftel Kazan’s package and hybrid type steam boilers are suitable; an economizer is added at 2 t/h and above. You can also add the heating of the workshop hall to the wizard: A 5,000 m² sandwich panel hall in Manisa requires 205 kW (176,000 kcal/h) ≈, which can be met by a separate hot water boiler .
How to do the calculation?
Simultaneity is taken as 0.7 for tables and presses, 0.8 for form finishers, and 1.0 for tunnel finishers; because the operator uses the iron intermittently, not continuously. According to this rule, a 100 kg/h boiler with 5% line loss and 10% growth rate feeds a maximum of 30 ironing boards. The heating condensate of the ironing board rotates, the spray steam does not rotate. The boiler is selected according to the peak load; the average load of a single shift (9 hours) determines the daily fuel.
Use the wizard at the top of the page to calculate with your own list of machines; Boiler Capacity Calculator for all industries.
The results of the wizard are predictions to give a preliminary idea; boiler selection should be finalized by on-site exploration and engineering calculation. Contact us for free pre-engineering support.