Vertical floor-standing autoclaves Systec VX-Series

High-tech engineering & all-around quality
Our autoclaves include pressure vessels made of stainless steel 316L (1.4404), with the housing and support frameworks made of steel as well. This makes the entire autoclave highly resistant to corrosion and very easy to clean. The housing and support framework are further enhanced with highly efficient top-quality Hanno-Tect for insulation. This material does not release any particles, allowing Systec autoclaves to satisfy the requirements of working under clean-room conditions.

Dual sensors standard in all autoclaves
Systec autoclaves use a temperature sensor in addition to an electronic pressure sensor to monitor both the pressure and temperature during the entire sterilization process. The flexible temperature sensor can be used within the chamber or alternatively in a reference vessel containing liquids. In addition, Systec VX models feature a temperature sensor installed in the floor drain.

Systec autoclaves are fitted with the following connections at the rear:

Meeting all regulations and sterilization standards
Systec autoclaves are fit to withstand sterilization temperatures of up to 140 °C as well as steam pressures up to 4 bar absolute pressure.

Systec VX-Series autoclaves can be augmented for higher pressure and temperature ranges, allowing temperatures of up to 150 °C and pressure levels of 5 bar (absolute pressure). In addition to adapting the chamber, the optional accessories for extending pressure and temperature ranges also adapt all safety elements and control components to the higher range of temperatures and pressure levels. This option can even be retrofitted on Systec Autoclaves.

Steam generation via steam generator 

The steam generator is integrated into the autoclave housing but separated from the sterilization chamber.

This has various advantages:

• No heaters or reservoirs of potentially contaminated water are required in the chamber.
• Thanks to the stand-by pre-heating function, an empty chamber can be heated to 121 °C within only 10 minutes
• Improved ventilation as gravity suctions the air downwards
• Cooling is sped up, as neither the steam generator nor the hot water inside the chamber requires additional cooling.
• Once the chamber is cooled, the next sterilization run can benefit from the generated steam.

Condensing steam instead of removal 

A PT-100-regulated cooling system is used to condense exhaust steam automatically. This prevents odors from developing and is especially useful for protecting plastic waste water pipes, if used.

Operation by Touch-Screen technology 

Thanks to a large (5.7 inch) optional touch-screen interface, controlling the autoclave can be made even easier. In addition, this option adds increased flexibility during autoclave operation and offers additional options for using the system, such as displaying process data numerically or graphically. Up to 100 different sterilization programs can be stored within the system, including seven pre-defined standard programs already included. Users can configure new programs themselves, defining and altering all available process parameters individually. Users are guided step-by-step through the entire process via the dialog menu. Every new program added is automatically given a permanent, unalterable name. In addition, a designation freely chosen by the user can be assigned to the program.

Pre-defined programs
1 Solids
2 Waste bags
3 Liquid waste
4 Liquids
5 Cleaning
6 Vacuum test*
7 Bowie-Dick test*

These can be expanded to 100 sterilization programs.
* Only in combination with a vacuum device.

Automatic door-opening functionality
Systec autoclave chamber doors are locked automatically, utilizing a circumferential ring system which engages when the door is being closed. The chamber is sealed using a special seal made of highly heat-resistant silicone; the seal tightens as more pressure is built inside the chamber. This occurs automatically, without requiring additional compressed air.

In full accordance with modern regulations for pressure vessels such as DIN EN (IEC) 61010-2-040, the door-locking mechanism is controlled by the interior temperature. Thus, the door remains firmly locked and sealed until all excess pressure within the chamber has dissipated. The door as well as various other elements of the housing and vessel are built using stainless steel and clad in an aesthetically pleasing front cover is made of insulated plastic that is highly resistant to heat. The same material is used for the control panel, display as well as parts of the control processing system. This prevents operators from coming into contact with heated surfaces.

The standard method of opening Systec autoclave doors is to press the corresponding opening button. Alternatively, the Systec VX-Series models can also be programmed to open automatically once the sterilization process has ended. This is very convenient for everyday use, as it allows residual steam to be vented automatically. Any residual heat within the chamber itself can be utilized to dry the items which have just been sterilized.

Systec autoclaves comply with the following standards and regulations:

Pressure vessel:

• 2014 / 68 / EU Pressure Equipment Directive
• ASME Boiler & Pressure Vessel Code, Section VIII, Division 1
• China Stamp

Other guidelines:

• 2014 / 35 / EU Low Voltage Directive
• 2014 /30 / EU on Electromagnetic Compatibility

All autoclaves are CE marked.
We will be happy to provide a complete list of standards and summary of regulations on request.

Selecting the correct process for each sterilization run
There is a variety of sterilization options available that may be required to obtain reliable and validatable sterilization results, as well as rapid cooling times, especially when it comes to sterilizing liquids. Which options are available depends on the items that are to be sterilized. A validatable, biologically efficient sterilization process can only be ensured if the autoclave is configured correctly.

The table shown below can help with configuring your autoclave – however, we recommend consulting with our experts before configuring sterilization programs.

+ Recommended procedure       ? Possibly acceptable        – Not possible

Heating up
The entire autoclave procedure typically includes only a small fraction of time dedicated to actual sterilization – for example, when sterilizing at 121 °C, only about 15 minutes are typically spent on sterilizing. While sterilizing liquids, in particular, phases of heating up the chamber and cooling it down again make up a considerably longer part of the sterilization procedure.

Conventional sterilization procedures
Most conventional autoclaves fail to properly sterilize liquids, as these typically reach only about 60 to 90 °C despite the chamber itself having already reached sterilization temperatures. This is because the temperature for sterilization within the chamber is reached quickly, while liquids need additional time for their temperature to equalize.

Up to 50 % shorter heat-up times as standard
Thanks to the regulation of pressure as well as temperature at the same time, the pressure within the vessel is evenly increased during the initial heat-up phase. As a result, temperature equalization between liquids and the chamber itself is sped up, resulting in overall shorter heat-up times.

Cooling
Liquids are also very slow to cool down, as, without active rapid cooling, temperatures within the chamber can only drop below 100 °C via a process of dissipating the built-up heat as radiation via the chamber insulation (see diagram: conventional cooling).

However, the overall time necessary for sterilization processes can be reduced substantially by using the new system and process technologies, potentially saving many hours during long sterilization processes (see diagram: rapid cooling).

Systec autoclaves offer numerous cooling functions for sterilizing liquids, including optional rapid cooling systems which reduce the time required for cooling liquids significantly.

Systec autoclaves can be cooled by conventional means, using a regulated steam venting procedure that cools the machine down to a temperature of 100 °C, after which the chamber cools down more slowly to about 80 °C by itself. Alternatively, they can include various options for rapid cooling, such as:

• Cooling with ambient air ventilation
• Mantle cooling with cooling water
• Mantle cooling with cooling water and support pressure
• Radial ventilator for air circulation and accelerated heat removal from the chamber
• Ultracooler
• Spray cooling with recirculated and recooled sterile water and support pressure

Mantle cooling with cooling water and support pressure 

A flexible PT-100 temperature sensor is used throughout the entire cooling procedure to monitor the temperature within a vessel that is filled with liquid as a reference measurement. The sterilization period thus begins only once the temperature required for sterilization has been achieved in the actual liquid instead of inside the chamber.

The temperature of any subsequent cooling processes is monitored as well. Additionally, in order to protect the sterilized items from delayed boiling, the lid of the container can be opened only once the temperature inside of it is equal to or lower than 80 °C, according to industry standards. To prevent the liquid from boiling, support pressure is applied during the cooling-down phase using compressed air which has been filtered to be sterile.

Advantages:

• No liquid can be lost during sterilization, as boiling is prevented
• Cycle times are reduced in order to fully utilize the volume of each bottle, improving productivity in the process
• Prevents delayed boiling and overboiling
• Prevents bottles from bursting due to the heat of sterilization
• Using hermetically sealed bottles prevents re-contamination after sterilization
• Reduces cooling times by up to 60 %

Additional Radial Ventilator  
Combined with an optional cooling system which cools the chamber mantle with water while applying support pressure, a radial ventilator can ensure that heat is transported quickly from the sterilized items to the chamber mantle where it is cooled down.

• In order to not reduce the space available within the autoclave, the ventilator is mounted within the chamber door.
• Typical ventilation performance: 71 m³/h
• Reduces time for cooling by 70 % or less

Ultracooler  
Combined with optional mantle cooling with cooling water, support pressure as well as a radial ventilator, an Ultracooler heat exchanger can reduce cooling times significantly, thus speeding up the process of sterilization as a whole.

• The Ultracooler is mounted inside the chamber door, surrounding the radial ventilator. This requires no additional space within the chamber.
• Can achieve cooling times of 15 to 60 minutes, depending on the type and number of items which are to be sterilized.
• Reduces time for cooling by up to 90 %

Vacuum system 
Solids, including but not limited to empty glassware, pipette tips in boxes as well as fabrics and porous materials like filters all require air to be removed before sterilization can commence.

A vacuum system removes air from solids and hollow items such as tubing, as well as from porous materials and fabrics, which allows the sterilizing steam to cover their entire surface area. This is ensured by utilizing a phase during which a fractionated pre-vacuum is created, combined with the steam generator integrated into the autoclave.

Drying solids wit Superdry 
The optional Superdry accessory increases drying efficiency porous materials, solids and fabrics. With this system, the heating coils wrapped around the sterilization chamber receive heat from the steam generator in order to facilitate drying. By using deep-vacuum drying with the optional vacuum device combined with Superdry, you can avoid having to dry sterilized materials in specialized drying cabinets.

Vacuum system 
When sterilizing waste bags, all air needs to be removed in order to ensure validatable sterilization results which can be reproduced every time.

The vacuum device effectively removes the air from disposal bags, allowing the steam to penetrate completely. The process includes a fractionated pre-vacuum phase in combination with the standard steam generator.

Exhaust air filtration & condensate inactivation
In order to sterilize hazardous substances, an optional system for filtering air exhaust is available for Systec autoclaves. Its heat-resistant sterile filter is installed in a pressure-proof housing, making it easily accessible. The filter consists of a cartridge with a PTFE membrane – with a pore size of 0.2 μm. The filter is itself sterilized over the course of each sterilization run. The PT-100 temperature sensor also monitors the filter.

During the phase of heating up the chamber and the actual sterilization phase, condensation is automatically retained and sterilized inside the vessel. All existing microorganisms are eliminated effectively, as air exhaust filtration systems and condensate inactivation methods prevent them from escaping during sterilization. This also ensures that hazardous liquids or gases cannot be released but are sterilized and filtered out instead.