Where a Mid-Size Horizontal Unit Fits
Pressurized steam heats loads above 100 °C and destroys microorganisms, including spores, on items that tolerate heat and moisture. A horizontal steam autoclave suits workflows where volume, trolley handling and a one-way flow matter more than a small footprint, which is why the format is common in sterile services and production. As a large capacity autoclave by laboratory standards, a horizontal autoclave sterilizer also moves loads by trolley rather than by hand.
The Horizontal Autoclave 26-HAC400 is a 250L horizontal autoclave with a double-door, microprocessor-controlled design and a listed sterilization temperature of 139 °C. The product page describes it as automatic, with a motorized sliding door and pneumatic sealing.
Cycle Stages in a Double-Door Installation
A horizontal steam sterilizer follows the stages below, and a double door autoclave adds the separate sterile exit. The notes also point out features the 26-HAC400 listing names.
- 1
Load from the unsterile side
Racks or a trolley enter through the loading door, with space left for steam to circulate.
- 2
Seal
The motorized sliding door closes and a pneumatic seal is applied, which limits steam loss.
- 3
Heat and purge
Steam enters and displaces air as the chamber reaches the set conditions.
- 4
Hold
The set temperature is held for the programmed time. The listing gives 139 °C as the sterilization temperature.
- 5
Exhaust
Pressure is released, and the interlock keeps the door shut until chamber pressure falls to 0.027 MPa.
- 6
Unload on the sterile side
The load exits through the second door, so sterile items never cross back through the unsterile area.
The listing names an automatic power cut-off with alarm for low water and an automatic shutoff against current overload. It does not describe the program list, vacuum stage or drying stage, so those details belong in a supplier conversation.
Practical Use Cases Across Facilities
Horizontal laboratory autoclave use covers the loads that arrive in volume and need a controlled route through the facility. The product page lists media, surgical and laboratory instruments, dressings and intravenous equipment, rubber closures and glass components, and heat- and pressure-resistant items for sterile workflows.
Central sterile services
Surgical and laboratory instruments processed in trolley loads, with a double-door layout separating used and sterile items.
Pharmaceutical production
Rubber closures, glass components and equipment parts sterilized before use in aseptic workflows.
Research facilities
Culture media and glass equipment in volumes larger than a vertical unit takes comfortably.
Aseptic support loads
Heat- and pressure-resistant items prepared for clean workflows, where traceable cycles matter.
Horizontal laboratory autoclave machine use at this size also depends on what surrounds the chamber, such as trolleys, staging benches and the route between loading and unloading rooms.
Porous Loads and Liquids Need Different Cycles
The title mentions liquid media and porous loads, and each needs more than a temperature and a timer. The table links each load to the cycle behavior it needs and to what the product page states.
| Load | Cycle need | What the listing states |
|---|---|---|
| Liquid media | Slow exhaust without vacuum pulses, which would boil the liquid | Lists media sterilization, with no liquid cycle detail |
| Dressings and porous goods | Air removal before the hold and drying after it | Lists dressings, with no air removal stage described |
| Wrapped or hollow instruments | Air removal so steam reaches enclosed surfaces | Lists instruments, with no vacuum stage described |
| Glass and rubber closures | Steam contact on all surfaces, then drying | Lists these components as applications |
Pre-vacuum units are usually checked with a daily air removal test, and a pulse vacuum autoclave is the format built around that stage. If porous or wrapped loads dominate the workload, the presence of an air removal stage should be confirmed in writing for the automatic horizontal autoclave under consideration.
Sizing a 250 L Chamber: A Worked Example
Capacity figures can mislead, so the chamber dimensions are a better starting point. The arithmetic below is illustrative and uses the listed 800 x 600 x 600 mm interior.
| Step | Illustrative value |
|---|---|
| Chamber volume from dimensions | 0.8 x 0.6 x 0.6 m = 0.288 m³ = 288 L |
| Listed capacity | 250 L, so the figure differs from the geometric volume |
| Sterilization module (reference size) | 300 x 300 x 600 mm |
| Modules per load (by geometry) | About 4 |
| Assumed cycle length | 60 min, which varies with program and load |
| Loads per 8-hour shift | About 8, or roughly 32 modules |
The module size is a common reference in sterile services and should be matched to the facility's own containers and racks. The gap between 288 L and 250 L probably reflects usable volume, though the page does not say so. Real throughput also depends on heat-up, exhaust and drying times that the listing does not publish.
Utilities and Site Planning
A unit of this class is installed rather than placed. The figures below come from the 26-HAC400 listing and should be checked against the site before ordering.
| Utility or site item | Listed requirement | Planning note |
|---|---|---|
| Steam supply | 0.4 to 0.6 MPa, 15 kg | Needs a steam line, and no time basis is given for the 15 kg figure |
| Water supply | 0.2 to 0.3 MPa, 150 kg | Needs a water line, and no time basis is given for the 150 kg figure |
| Compressed air | 0.6 to 0.8 MPa | Operates the pneumatic door seal |
| Electrical power | 26 kW | Voltage and phase are not stated on the page |
| Size and weight | 1100 x 1300 x 1700 mm, 650 kg net, 800 kg gross | Determines access routes, floor loading and service clearance |
The water figure is ten times the steam figure, which suggests it covers cooling or condensate use, though the page does not explain it. That is worth clarifying, since it affects plumbing and drainage design.
Mid-Size and Large Horizontal Units Compared
Capacity class shapes siting and workflow. The comparison below uses the models on the site and typical characteristics.
| Format | Capacity | Typical fit | Consideration |
|---|---|---|---|
| Vertical | Up to 200 L on the site | Compact batches, top loading | Lifting loads and no through-wall flow |
| Horizontal, mid-size | 250 L (26-HAC400) | Steady production flow in sterile services or labs | Needs steam, water and air connections |
| Horizontal, large | 600 L (26-HAC402) | High-throughput plants | Heavier site works and a larger footprint |
All three sit in the wider autoclave category, where throughput and site layout usually settle the choice of format.
Operating Basics
A short horizontal laboratory autoclave how to use outline follows, and the manual for the unit takes priority.
- Check steam, water and air supplies and the door seal before each shift.
- Load racks evenly with gaps for steam, and stay within the rated chamber volume.
- Keep liquids, porous goods and hard goods in separate cycles with suitable programs.
- Avoid placing wet packs against each other, which slows drying and leaves packs damp.
- Wear heat-resistant gloves and eye protection when unloading, and allow loads to cool.
- Use indicators suited to the load and file cycle records for each run.
- Follow lockout procedures for service, since steam, pressure and moving doors are hazards.
Specifications Worth Reading Closely
Reading horizontal laboratory autoclave equipment datasheets takes care, because pressure, temperature and utility figures interact. The figures below come from the 26-HAC400 listing, which is also summarized in its product catalog.
| Parameter | 26-HAC400 listing | Why it matters |
|---|---|---|
| Capacity and chamber | 250 L, 800 x 600 x 600 mm | Sets rack and trolley size and the longest item |
| Temperature | 139 °C | Above the common 134 °C set point |
| Pressure | Sterilization pressure 0.25 MPa, working pressure up to 0.22 MPa | The two figures differ, and the reference basis is not stated |
| Doors | Double door, motorized sliding with pneumatic sealing | Supports a one-way flow between areas |
| Safety | Door interlock to 0.027 MPa, low-water cut-off with alarm, overload shutoff | Limits unsafe opening, dry heating and electrical overload |
| Control | Microprocessor, digital LCD, automatic operation | Supports repeatable cycles and live monitoring |
The page describes the door as motorized or sliding in the description and as motorized sliding in the features, and the chamber volume from its dimensions exceeds the listed capacity. Both are worth confirming.
Selection Mistakes to Avoid
- Choosing on the capacity figure alone. Chamber dimensions and rack design decide real throughput.
- Skipping the load review. Liquids and porous goods may need programs the listing does not describe.
- Underestimating site work. Steam, water, compressed air, a 26 kW supply and a 800 kg delivery need planning.
- Ignoring the room layout. A double-door unit works only when both work areas and the wall opening are planned together.
- Overlooking the water figure, which is large and unexplained on the page.
- Comparing horizontal laboratory autoclave manufacturers on capacity alone. Documentation, installation support and service shape long-term use.
- Reading the word automatic as unattended. A horizontal laboratory autoclave machine of this size still needs trained staff for loading, unloading and checks.
Exploring the Wider Horizontal Range
This unit belongs to the horizontal group at Lab Expo, in a portfolio that also includes medical autoclave models. According to the horizontal autoclave range page, the group serves high-capacity workflows where large instrument loads need uniform steam distribution, with stainless steel chambers and digital control of temperature, pressure and cycle parameters.
Within this category, a laboratory horizontal autoclave is usually weighed on chamber volume, door type, program range, utility demands, control features and installation needs. The complete Autoclave category lists the configurations available.