Focus on your product

Individually designed, planned and manufactured – with state-of-the-art technology

HOF systems – state-of-the-art technologies for practical applications

Equipment and systems from HOF are designed and implemented precisely to your individual requirements. We use state-of-the-art technologies in the equipment and systems to achieve excellent results.

HOF systems are often highly innovative and many new developments have been patented. HOF products can be characterized in three words which are important for pharmaceuticals and biotechnology: future-proof, powerful and practical.

HOF is known for innovative products which are developed precisely to the customers’ requirements using the latest technologies and a lot of know-how. As in all our systems, our service also proves that HOF is the specialist for individual solutions. Our systems a glance:

  • Laboratory systems (GLP)
  • Vial production systems (GMP)
  • Bulk production systems (GMP)
  • Loading and unloading systems (GMP)
  • Freezing and thawing equipment (GMP)

HOF freeze drying systems – customised, reliable and easy to operate

HOF freeze drying systems are tailored individually and precisely to the task at hand and to the specific production requirements. For systems which are required for research or for product and process development, we guarantee that the respective process parameters are fully transferable to the production systems. That ensures reliable production!

And: Each system is ideally adapted to the structural environment on site.

Keeping an overview with HOF software

The specially developed software from HOF makes the process control of HOF systems particularly user-friendly. All functions are always visible at a glance and any irregularities are identified immediately.

An optional remote control function provides reliability in production, because the cause is analysed precisely straight away in case of a malfunction.

Our own products also include a visualisation system for creating product-specific temperature profiles, system visualisations and batch-based documentation of processes.

Vial and bulk systems – variety in top quality

Freeze drying systems

HOF is the specialist for individual solutions. That is why freeze drying systems are tailored individually and precisely to the task at hand and to the specific production requirements. And: This allows us to ideally adapt each system to the structural conditions on site. In this area, HOF offers a wider range of freeze drying systems, with regard to system size, model variants and optional equipment. The portfolio ranges from small pilot systems with a footprint from 2.5 m2 to systems with a footprint of 75 m2.

The following equipment variants are available:

  • Vertical design
  • Horizontal design
  • Modular technical units which can be installed according to the building situation
  • Door concepts:
    • single door
    • double doors (facing as a reach-through system)
    • slot door especially for automatic loading and unloading systems
    • slot door integrated into swivel doors
  • The systems can be equipped with different cleaning and sterilizing units for aseptic processing areas and with systems for decontamination of the system periphery.
  • System design for drying products with organic solvents
  • Systems for process monitoring and process analysis
  • Refrigeration systems:
    • two-stage refrigeration sets with synthetic refrigerants
    • cascade refrigeration sets with natural refrigerants
    • LN2 refrigeration via heat exchangers for the installation areas and the ice condenser
    • LN2 refrigeration as direct evaporation for the ice condenser

For the vacuum systems, HOF offers different variants for different requirements:

  • Oil sealed rotary vane pumps with or without Roots-type blower
  • Glandless pumps with Roots-type blower
  • Screw compressor with or with or without Roots-type blower
  • Upstream or downstream exhaust gas filtration

As a specialist for individual solutions, HOF can also supply systems for different requirements in bulk production:

  • Systems with fixed shelves for loading with trays
  • Systems with hydraulically height-adjustable shelves for easer tray handling
  • Systems with tilting shelves for cascade filling, with the shelves designed as product pans The CIP/SIP process can be used here to reload the system with products without opening the chamber door.

Different systems are available for unloading. These are selected according to individual requirements. The same options are available for vial and bulk production systems.

Laboratory systems – optimum system technology, optimum equipment

The customised laboratory systems from HOF with very high quality are used in many renowned companies and scientific facilities for research purposes and for product and process development.

Highly efficient product results

HOF offers the modern systems in compact or split design with a footprint of 0.2 to approx. 2.5 m2. Control, visualisation and technical operation correspond to that of a production system. Transferring the determined process parameters to a production system is made easier and forms the foundation for reliable production. Each HOF laboratory systems consists of a fully functioning basic unit. Individual equipment variants for customised solutions are also available, providing the required flexibility for the task at hand.

Technical data

  • Total footprint: 0,22 m2 to 2,5 m2
  • Number of shelf sets: 3+1 to 7+1
  • Dimensions of shelf sets (mm): 250/300; 420/470; 600/600
  • Hydraulic adjustment of shelves
  • Operating voltage: 400 V/50 Hz
  • Cooling from +20° C to -50° C ≤ 40min
  • Heating from -40° C to +20° C ≤ 60 min
  • Temperature range from -55° C to +80° C (optionally down to -60° C)
  • Evacuation time from 1000 mbar to 0,1 mbar ≤ 20 min
  • End vacuum: 5 µbar
  • Leak rate: < 0,01 mbar*l/s
  • Ice capacity: 4 - 40 kg
  • Temperature minimum condenser: ≤ -70° C (optionally ≤ -75° C)
  • Control: Siemens SPS S7-300
  • User interface: HOF Freeze Viewer Professional

HOF Loading and unloading systems - safe and patented

The safe, optimum and integrated transport of pharmaceutical products and primary packing is the core property of the loading and unloading systems from HOF. The large number of models for loading freeze dryers ranges from models for technical centres to production sizes. And: It allows individual adaptation to any layout. The new design was specifically adapted to customer-specific requirements. High performance and reliability are the crucial factors here. The range covers manual, semi-automatic and fully automatic systems. Special packaging materials such as 2-chamber vials or 2‑chamber syringes can be transported with ease. We hold patents worldwide for these technologies.

Versatile and individual

The loading and unloading systems are installed and tested at our own production facility together with freeze dryers or in front of a suitable dummy frame. The clear advantage is the reduced installation and test period at the customer site. Existing freeze dryers can be retrofitted with the innovative loading and unloading systems from HOF to meet future requirements. Depending on the requirements, loading and unloading systems can be designed for insulator or RABS technology.

Bulk systems


  • Robot with filling lance
  • Robot with suction device
  • Product separator


  • Filling trolley with dosing system
  • Filling trolley without dosing system


  • Lances for filling process
  • Lances to the filling process
  • Product separator

Vial systems


  • Magazine filling
  • Manual transfer trolleys to freeze dryer
  • Semi-automatic loading and unloading
  • Automatic loading and unloading

Frameless row by row

  • Loading and unloading row by row
  • Loading row by row
  • Unloading row by row
  • Unloading multi-segments
  • Batch loading for trolley systems

Frameless by shelf

  • Loading and unloading trolley system
  • Loading trolley system
  • Unloading trolley systems

Freeze-Thaw Units – precise processes and own software

Adjustable freezing speed and full control over the freezing process are among the top specifications for freezing systems from HOF. The total fill quantity is frozen evenly and independent of the bag size.

Each product bag has the same freezing conditions and, at the end, the same shape. This allows bar codes to be machine-read on the flat surface, for example of a plasma bag. The reliable documentation of temperature and time are a matter of course.

Freezing systems from HOF are energy-saving with indirect refrigeration and use no energy when idle. Large doors ensure fast loading and unloading. The interior of the devices are made of stainless steel and can be cleaned easily.

HOF FTU Plasma: Freeze-Thaw Units for blood transfusion services

Adjustable freezing speed and full control over the freezing process are among the top specifications for freezing systems from HOF.

The total fill quantity is frozen evenly and independent of the bag size.

Each product bag has the same freezing conditions and, at the end, the same shape. This makes it possible for bar codes to be machine-read on the flat surface, for example of a plasma bag. Reliable temperature and time  documentation is a matter of course.

Adjustable freezing with full control and proprietary software

Absolutely reliable freezing and thawing

HOF‘s Freeze-Thaw Units guarantee quality-compliant storage of blood plasma because the product bags are frozen within 45 minutes to at least -30 °C at the bag’s core. At the same time, up to 120 bags with a capacity of 400 ml can be processed. The frozen blood plasma can also be safely thawed again.

Custom requirements – individual plant sizes

Because our customers have different product capacities, there are two model types available: On the one hand, systems for processing up to 60 of the 400 ml bags are manufactured and, on the other hand, systems for up to  120 of these bags.

For individual adaptation Plants are divided into two different types. The compact design accommodates all process-relevant components within the device. On the other hand, there is the possibility of split-construction to lower the sound pressure level directly on the device. Here, the refrigeration components outside the unit are mounted on a separate machine frame.

Advantage: uniform heights of bag systems

The integrated pneumatic adjusting plate system compresses the product bags for the freezing process, so that all processed product bags have the same height after freezing.

The product bags also have flat surfaces on both sides: Barcodes can be machine-read and storage is greatly simplified.

Transparent documentation

The HOF Freeze Viewer Professional software developed by HOF is available for the documentation of processrelevant data. This software, which is configured for blood transfusion services, collects data such as bar codes,  process reports and temperature history and either prints them out in the form of a process report or electronically transfers them to a higher-level system.

More than just hardware and software

The device design for blood transfusion services is based on HOF’s state-of-the-art technology. Apart from production, we also offer, as part of the scope of supply, special packaging, transport and handling support, as well as  annual service and maintenance units.

HOF FTU Pharma: Freeze-Thaw Units for the pharmaceutical industry and biotechnology

Adjustable freezing speed and full control over the freezing process are among the top specifi cations for freezing systems from HOF.

The total fi ll quantity is frozen evenly and independent of the bag size.

Each product bag has the same freezing conditions and, at the end, the same shape. This allows bar codes to be machine-read on the fl at surface, for example of a plasma bag. Reliable temperature and time documentation is  a matter of course.

Adjustable freezing with full control and proprietary software

Safe control of all parameters

Reliable process control is indispensable when freezing and thawing pharmaceutical and biotechnological products. The same applies to the adjustable freezing and thawing speed. Here, with the individual Freeze Thaw Units  (FTUs), HOF meets all the requirements of professional users from the industry. The FTUs are each developed and manufactured according to customer-specifi c requirements. Products that have to be fed into bag systems can  be transported into the plant either manually or by means of a semi-automatic loading aid developed by HOF.

Custom requirements – individual plant sizes

Two types are offered in order to respond fl exibly to on-site installation possibilities. The compact design accommodates all process-relevant and electrotechnical components inside the device.

On the other hand, there is the possibility of split-construction to lower the sound pressure level directly on the device. Here, the refrigeration components outside the unit are mounted on a separate machine frame.

Reliable cooling, reliable heating

Product tempering takes place within the FTU via a plate system. The control panels are designed to freeze the entire load evenly and regardless of bag size.

For temperature control, silicone oil is cooled with a separate cooling system or heated with the built-in electric heater. The integrated refrigeration system’s design is specified according to customer requirements. Optionally, a R452A type hydrofluorocarbon compressor system, a natural refrigerant compressor system (ethane/propene), or a liquid nitrogen system are available.

Included in delivery: „HOF Freeze Viewer Professional“

The FTUs are equipped with a visualization system for process control, the „HOF Freeze Viewer Professional“. This system complies with FDA requirements according to 21 CFR Part 11. With this software, specially developed by HOF, all process-relevant data, such as batch reports and temperature profiles can be printed out in the form of a process report or sent to a superordinate system. Customers can create respective recipes for the individual products individually.

Service is one of them

HOF’s FTUs always comply with state-of-the-art technology and meet high safety standards. Apart from production, HOF stands for comprehensive project support. At the same time, the entire project - from plant planning and production at HOF to commissioning - is entirely managed on-site by a project team. HOF is also available during transport and during introduction of training courses and the annual service and maintenance units.

HOF debottling-system with water bath and cutting station

The innovative HOF debottling-system, consisting of water bath and cutting station, was developed for automated, targeted defrosting of frozen plasma bottles, allowing the remaining frozen core and the surrounding liquid to be removed easily after cutting open the bottles.

Fully automated transport

First operators load the magazine which can contain up to 16 bottles. The bottles are then moved onto the conveyor belt and into the 4 tracks of the water bath.

Defrosting process of the human plasma

There, the plasma bottles move through the heated water bath while submerged. The defrosting causes a thin layer of the human plasma to thaw at the contact surface with the plastic bottles. At the end of the water bath, the plasma bottles are sprayed with hot WFI to counteract germs and particles on the bottle surface. They now surpass an air knife to remove potential remaining condensate.

Fully automated cutting station – “guillotine”

Then the plasma bottles drop into the “collection hopper”, in an upright position for the first robot ... which grabs the plasma bottles and guides them into the subsequent cutting station. From the other side, the second robot grips the plasma bottles by the base. Then the bottles are cut in half.

State-of-the-art robot technology

After cutting, both robots empty the bottles halves with the human plasma cores into the draining trays. Subsequently, the plasma slides or flows through a guiding channel into the pooling vessel.
Based on a sensoring system, the bottles are checked if they are completely empty, before the empty bottle halves are placed on a discharge rail, leading to a disposal tube.

Compact, reliable and safe

The HOF debottling system, consisting of water bath and cutting station, is a highly innovative technological solution.

HOF systems can be described in three words: powerful, practical and future-proof.

In 2016, 2017, 2018 and 2019, HOF received the TOP 100 Seal for the most innovative companies in Germany.

Take a look at the detailed product video!

Our service for you – as individual as our solutions

Only our own employees work on your system at HOF – even long after it has left our factory. HOF employees transport, install and commission your system and also qualify it. This minimises interfaces and excludes problems, saving time and costs.

24 hours service

You can always reach one of our employees in emergencies at +49 6462 9169-0. 24 hours a day, 365 days a year. Why? Simply because we know that our systems are an important part of the production process and that production reliability has to be ensured. Our emergency team from service and production know the system down to the last detail and can help immediately to keep downtimes as short as possible. The on-site warehouse with over 60,000 items ensures that the essential spare parts for all systems are always available without delay.


Die Bestandsanlagen von HOF sind aufgrund der kurzfristigen Verfügbarkeit und hohen Qualität eine anerkannte und sichere Investition.

Mit einer verfügbaren Bandbreite von Laborgefriertrocknungsanlagen, über Produktionsanlagen bis hin zu Einfrier- und Auftaugeräten stehen Ihnen diese in unserem eigenen Lager zur Auswahl bereit.

Jede Anlage wird von HOF intensiv geprüft bevor Sie ausgeliefert und übergeben wird. Dies gibt Sicherheit und gewährt eine lange Lebensdauer. Spezifische Anforderungen auf Ihren Anwendungsfall können an den Anlagen entsprechend umgesetzt werden.

Qualification – for your reliable production

We qualify your systems in a GxP-regulated environment. Our own qualification department creates the individual qualification and validation requirements for our systems. This includes:

  • Performance specification
  • Project and quality plan
  • System description
  • Risk analysis for system-specific risk scenarios
  • Hardware design specification
  • Software design specification
  • Traceability matrix
  • Calibration and SAT (site acceptance test)
  • Qualification documentation for IQ and OQ

Extensive measurement equipment

The documents are created and coordinated based on a performance specification. HOF carries out the tests planned in the qualification documents. Extensive measurement equipment is available for calibration and qualification. The following are calibrated:

  • Temperature
  • Relative pressure
  • Absolute pressure
  • Vacuum Pirani and capacitive
  • Conductance
  • Flow rate and others

Among others, Kaye validation systems are used for the qualification in the framework of temperature distribution measurements and sterilisation validation. The validation and qualification systems are subject to continuous testing.

Qualified process development

The services provided by HOF also include qualified process development to offer you added reliability. We use our extensive modern equipment and the available laboratory systems to support you in all matters of process control. This allows us to reduce process times and optimise the quality of the dried product where possible. Equipment for resistance and temperature measurement as well as a cryo-microscope are available for detailed examination of your product.

Design and concept studies – individual and excellent integration

A sound concept is always the basis for the success of your project. As a specialist for individual solutions, we ensure the best possible integration of freeze drying equipment and systems in industry and research. Customised concept studies and plans in 2D and 3D form the basis for our joint work. In addition to the functional aspects, other important parameters are also taken into account:

  • Reliability of the system
  • Easy access for service and maintenance
  • Safety
  • Investment and availability of the systems
  • System capacities

Maintenance – safety through regular checks

Regular maintenance is necessary for perfect functioning of your system. We recommend annual maintenance – necessary due to the service life of seals, for example. It is practical to carry out the annual calibration of the measurement equipment and the sensor system at the same time. After completing the maintenance and calibration work, the systems undergo documented test runs. What is important in this context: The HOF team is also available for freeze dryers from other manufacturers!

Training – successfully transfer of knowledge

For the targeted transfer of knowledge, we always offer training courses which are adapted to your company and your system. HOF training courses are designed to familiarise your employees with your individual system fundamentally and comprehensively, reducing downtimes, enabling fast and independent working and increasing productivity. To increase learning success and knowledge transfer, our employees focus on a personal teaching approach based on practical application.

Any questions?