AVA GmbH & Co. KG

Laboratory mixers, Laboratory dryers, horizontal mixers, horizontal dryers

Operational volumes         0.2 – 200 liters

Fields of application

AVA´s laboratory mixers are suitable for mixing powders, for example in laboratories or small productions in the chemical and pharmaceutical industry.

Laboratory mixers or laboratory dryers have a wide variety of uses ranging from mixing of suspensions to drying of wet products, granulation of powders with liquids and many more.

System with many advantages

Designed with double jacket for heating or cooling, the mixer realizes perfect results in drying of wet products.

The horizontal batch mixer is easy to handle for charging, emptying and cleaning by rotable drum.

Application Specials

• Design: As desktop device, mobile or stationary
• Cylinder jacket for cooling / heating
• Pressure / vacuum variants
• Cutting head for splitting agglomerates
• Explosion-proof variant
• Nozzles for the addition of liquids
• Product temperature gauge
• Electrical heating
• Insulation
• Front flap
• Various paddle forms
• GMP and CIP variants

Ring Layer Mixer, horizontal mixer, horizontal dryer

Throughput performance:               0.5 – 100 m³/h

The mixing effect is based on a high circumferential speed of up to 50 m/sec. The resulting centrifugal force brings the product into a ring layer at the periphery of the mixing drum. The high speed difference between the rotating mixing elements and the mixing drum combined with the use of different mixing elements guarantees a very high mixing intensity.

AVA Test Centre

To gauge the efficiency of the AVA systems a modern test centre is available. Working with actual ingredients our process engineers help you to develop new products and to perform scale up tests for the design of production machines. There are also rental machines available to perform tests at the clients’ site

Fields of application

The AVA ring layer mixer is used for micro granulation in the chemical and pharma industry, mixing and drying e. g. in the food industry and is also suitable for fibre processing, production of adhesive bonding compounds, pastes and chipboards.

AVA provides you the right solution for your specific application.

Advantages

• Very intensive mixing
• Highly effective mixing of solids with fluids for the production of pastes
• Production of micro granules up to granules in the range of millimetres
• Optimal disintegration of fibre products
• Very short retention time - therefore small machine sizes with high throughput
• Optimal utilization of the installed power

Application specials

• Completely closed, extricable mixing drum for easy cleaning and demounting of the main shaft
• Mixing drum with inspection doors
• GMP design with CIP / SIP equipment
• Heating / cooling of the drum
• Antiabrasive lining for optimal wear protection
• Replaceable half shell lining
• Antiadhesive lining
• Mixing elements with hard metal coating
• Materials from carbon steel to Hastelloy

The German company AVA offers State-of-the-Art technology for sterilization of spices without losing their color and taste. Due to the dynamic motion within the AVA machine the sterilization happens to all spice particles at the same time and with same intensity. During sterilization the vessel is hermetically closed. It is pressurized preventing escape of volatiles. Color and taste stay with the spices.

Guaranteed 5 log reduction

AVA offers the safest and cleanest sterilization technology, using overheated steam under pressure. And treatment takes a short time only. Sterilizing pepper, chili, coriander, marjoram, and many more products as powders or as grains by AVA is a fast, safe and easy procedure. TPC/g–levels for germs, yeast fungi and mildews fall well below food-law standards. Guaranteed at least 5 logs.

AVA sterilizers maintain color, taste, smell, humidity

AVA treatment gives perfect sterilization results. Steam overpressure keeps the otherwise evaporating taste-smell-components within the product. Recipes for different spices can be memorized in the AVA software. The humidity of the treated spices stays unchanged but also can be adjusted.

Advantages of the AVA Sterilizer

AVA pressurized steam sterilization has numerous advantages over traditional sterilizing technologies:

•the entire bacteria get sterilized rapidly as the steam automatically invades all spots

•no hidden bacteria friendly area in the machine

•color, taste and smell remain unchanged

AVA Sterilizers are multi purpose machines

AVA machines are entirely designed and made in Germany and are available from 30 Liter batch volume up to 20.000 Liter. The helical agitator is driven and sealed from top, distant from treated product. Due to very few turning parts, the machine is unsusceptible and easy in maintenance. By their nature AVA sterilizers are multi-purpose machines. Beside sterilizing spices and other food ingredients they are valuable tools for R & D and can be used for mixing, drying, coating, reacting and more purposes.

Batch Mixers

AVA’s HTC series batch mixers are optimally suited for variable processes and frequent product changes. These horizontal mixers induce mechanical turbulence or, alternatively, process aggregate mixtures. The task of the mixer is to deliver a homogeneous mixture featuring an extremely small variation coefficient within a batch time (loading/mixing/discharge) of between two and five minutes. Decades of experience and a wide range of equipment delivered in various installation sizes, materials, and styles, speak for themselves. We deliver AVA batch mixers tailored to your requirements.

• Mixing times between 15 seconds and several minutes
• Perfect mixing quality
• Short discharge times and low-residue discharge
• Optimal cleanability (in compliance with EHEDG standards on request)
• Consistently reproducible product quality
• Product filling level up to 80%
• Gentle product preparation

Continuous Mixers

From powder mixers to heavy-duty mixers, AVA HTK series mixers for continuous operation are excellently suited to large throughput volumes in continuous processes. These horizontal mixers induce mechanical turbulence or alternatively process aggregate mixtures. Our robust technology allows for 24-hour continuous operation, 365 days a year. The raw materials are fed continuously via appropriate dosing units and nozzles, and the finished mixture is continuously discharged via suitably designed discharge elements. Thanks to special agitators, AVA continuous mixers achieve very high throughput rates and optimal backmixing despite compact installation sizes. If you need any more arguments, have a look at the large number machines we have shipped and the deep industry know-how we have gained over the years.Verweilzeiten zwischen 15 Sekunden und 30 Minuten

• Retention times of between 15 seconds and 30 minutes
• Special agitators for intense backmixing
• Small space requirements
• Retention time extension by means of AVA special agitators
• Product filling level of up to 70%
• Gentle product preparation
• Excellent energy efficiency
• Low maintenance expenditure

Horizontal Dryers

AVA HTC-T (batch dryers) and HTK-T series (continuous drying mixers) are horizontal contact drying mixers or convective drying mixers that are designed as shovel drying mixers and often used as reactors. The product fed into the machine comes into direct contact with the heated drying elements (drum, head ends and/or shaft, and shovels) and is continuously shifted by the rotating agitator. In the convective drying mixer variant, steam or hot air is fed into the mixer interior and the drying elements can also be heated. Half-pipe coils or double jackets are available for heating the drum. Thermal oil or steam are most commonly used as heating fluid, or an electric heater can be used for high-temperature applications. The constant circulation along the heated surfaces leads to uniform moisture expulsion and creates a uniform temperature and product humidity in the drying mixer product chamber. Vapors are removed via vapor filter systems specially constructed by AVA. The shape and angle of the shovels ensure optimal heat exchange between product and side wall. Separately driven choppers dissolve lumps, thus resulting in a fine-grained to powdered material consistency. Benefits include very short drying times, which can be further reduced by including a vacuum dryer in the design.

• Can be used as drying mixers, reactors, or evaporators
• Mixing in the turbulent range, by inducing mechanical turbulence, or in a moving aggregate
• Heating media: steam, thermal oil, water, or electrical heating in high-temperature applications
• Coolant: brine solution or water
• Temperature transfer via double jacket, half pipe and shaft
• Materials: carbon steels through to high-quality stainless steels such as Hastelloy
• Drying temperatures: –20°C to + 800°C
• Pressure in product and heat chamber: -1 bar to +40 bar
• Design- and process-related short drying times
• Consistent, uniform temperature and product moisture
• Strip process drying

AVA dryers for pharmaceutical substances meet and exceed International standards GMP and FDA, also for HP APIs. AVA dryers are customized units, made of high-quality steel up to hastelloy. They can be equipped with fully automatic containment solutions or manual glove boxes to ensure maximum of industrial safety measures.  

Clamped flange joints and CIP/WIP nozzles make AVA dryers extremely easy to clean. By using the AVA hydraulic lifting column the dryer’s upper and lower parts can automatically be separated to gain access to the interior of the dryer. The original AVA helical agitator is driven and single-sealed from top. Shaft seals and bearings do not leak into the product, what minimizes the contamination risk. AVA offers a variety of gas lubricated lipring seals and mechanical seals, lump breaking choppers, sight glasses, samplers.

The AVA Drying Process

The product as a wet cake on suspension pours into the AVA dryer from top, discharging the upstream centrifuge or nutsche. After filling the dryer´s top valve is closed. During drying the product is moved by the AVA helical mixing tool. Product is pushed upwards the vessel, absorbing heat energy from the heated jacketed wall. From up there the product flows back into the centre to the bottom of the vessel, gets lifted up again and so on. It scrolls through a continuous vortex-motion many times per minute, homogenizing very quickly in terms of temperature and humidity.#

Up to 70% time saving with AVA technology

Vacuum lowers the steam pressure and the solvents quickly evaporate at low temperatures. For boosting AVA drying rates the dryer´s shaft and agitator also are heated to provide additional surface for even higher heat transfer rate. By these measures AVA drying time shortens up to 70% compared to traditional conical dryer systems. A pneumatically controlled ball segment valve with an inflatable seal is situated in the lowest point of the dryer to discharge the dry goods as a powder. There is no dead space.