What we keep, what we replace

Over 90% of the mass stays in service.

The heart of an autoclave is a stainless steel pressure vessel. It does not wear out like the electronics that run it. We replace what ages and keep what lasts.

Elevation of a 4,900 L autoclave1 100 × 1 850 × 2 400 mm12345678
Elevation · 4,900 L chamberIMTECH-STERI · REV. 2026
  • 1
    Chamber and doors6,250 kg of stainless steel for 4,900 L
    kept
  • 2
    Jacket and insulationinspected, refurbished if needed
    kept
  • 3
    Frame and claddingkept as they are
    kept
  • 4
    Steam and vacuum piping, pumpkept and inspected
    kept
  • 5
    Control cabinet and wiringnew
    new
  • 6
    PLCnew, Siemens
    new
  • 7
    Sensors and instrumentationnew and calibrated
    new
  • 8
    itech softwarelatest version, full traceability
    new
Kept ≈ 6,250 kgReplaced < 500 kg (estimate)
Your autoclave

How much CO₂ does your chamber save?

Pick your chamber volume. We only count the stainless steel of the chamber and doors, not the frame, piping or transport.

Chamber volume

Example: replace it with your own figure.

Steel kept
6,330kg
chamber and doors
CO₂e avoided, at least
10.1t
with the most recycled European steel

From 10.1 t with the most recycled European steel to 44.3 t with the world average.

28 days of production gained≈ CHF 280,00017 days of downtime instead of 45 for an autoclave replacement (our 2025 projects).
Method

How we calculate.

Steel mass

Mass estimated from a 4,900 L pharmaceutical chamber ordered in 2025 (1,100 × 1,850 × 2,400 mm, under 6,400 kg; 6,250 kg used), scaled with the chamber surface (mass proportional to volume to the power 2/3). At equal volume, our design data give higher masses, so the estimate is conservative.

Emission factor

1.6 kg CO₂e per kg of stainless steel for the most recycled European steel (Outokumpu, 2024) and 7 kg for the world average (same source, based on CRU and worldstainless data). We always show the low value.

Scope

Steel production only (cradle to gate). Machining, welding, transport, frame, piping and disposal of the old chamber are not counted, so the real figure is higher.

Price, downtime, hours

Data from our 2023 to 2026 projects: 6 pharmaceutical control revamps compared with 2 autoclave replacements with a new pressure chamber, the core of a new autoclave. A completely new autoclave costs more, so our price gap is conservative. Downtime and hours: two 2025 projects, from removal to end of OQ.

Legal framework

Since 1 January 2025, the Swiss Unfair Competition Act (art. 3 para. 1 let. x UCA) requires environmental claims to rest on objective, verifiable criteria. Every figure on this page is sourced.