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Products / High Shear Emulsification Machine /  In-Line



For over 50 years Silverson has specialised in the manufacture of quality High Shear Mixers for processing and manufacturing industries worldwide.With customers in over 140 countries and serving industries as diverse as food, pharmaceuticals, cosmetics, chemicals, luboils and petrochemicals, Silverson has become a world leader in the field of High Shear Mixing. Time and again companies specify Silverson Mixers as the ¡°standard¡± equipment for their manufacturing processes. A truly international company, Silverson is represented by a network of associated companies, distributors and agents in over 40 countries, serving North America, Europe, Asia, Australasia, South America and Africa.

The Silverson Advantage

SPEED The exceptionally rapid Silverson mixing action substantially reduces process times compared with conventional agitators and mixers and can reduce mixing times by up to 90%.
VERSATILITY The advantage of the Silverson approach to mixing is that any one machine can perform the duties that in the past may have required several different pieces of process equipment.

Unrivalled versatility allows any machine to be adapted to perform the widest range of mixing applications mixing, emulsifying, homogenising, disintegrating, dissolving, dispersing, blending, particle size reduction and de-agglomerating.

AERATION FREE As the Silverson In-Line mixer and the associated vessel and pipework form a closed system, the mixing process is completely aeration free. This is particularly important for applications where air entrainment creates a problem.

SELF-PUMPING Silverson In-Line mixers provide a high volume centrifugal pumping action which, in most cases, will be sufficient for the process requirements without the need for auxiliary pumps.

If, due to viscosity, vertical head or pipeline losses, the In-Line mixer¡¯s output falls below the required figure, it may be supplemented by the insertion of an auxiliary pump into the system without reducing the efficiency of the mixer.

GUARANTEED EFFICIENCY The Silverson In-Line mixer design makes it physically impossible for any materials - liquid or solid - to pass from the inlet to the outlet without being subjected to intense mechanical and hydraulic shear as they pass through the rotor/stator workhead. Bypassing is impossible.

LOWER POWER REQUIREMENTS As the Silverson In-Line mixer¡¯s energy is concentrated on processing the small volume of material inside the workhead at any given moment, power is not wasted moving large volumes of liquid and consequently less power is normally required than for the equivalent batch mixer. This is particularly beneficial when processing large volumes of material.

INCREASING EXISTING PRODUCTION Where existing agitators and conventional mixers are being used, the addition of a Silverson In-Line mixer will greatly reduce the process time, whilst at the same time improving product uniformity. Easily installed, Silverson In-Line mixers can substantially increase existing production with a minimum of capital investment by saving the need for additional mixing vessels, pipework and auxiliary equipment.

What will the Silverson do?

BLENDING In blending liquids of similar or greatly varying viscosities, the unique Silverson mixing action can rapidly produce a guaranteed homogeneous product, normally in a single pass.

EMULSIFYING AND  HOMOGENISING The special high shear rotor/stator design means that emulsions (typically in the range of 0.5 to 5 microns) can be easily achieved, in many cases dispensing with the need for more costly and complicated equipment such as high pressure homogenisers.

DISINTEGRATION All Silverson mixers are able to disintegrate matter of animal, vegetable, mineral or synthetic origin in a single operation.

PARTICLE SIZE REDUCTION For particle size reduction, the high shear rotor/stator action will ensure the rapid and uniform milling of both solid and semi-solid materials into either solution or fine suspension. The degree of size reduction will always depend on the hardness or toughness of the product but in many applications the use of a Silverson will dispense with the need for conventional size reduction equipment, such as dispersers/cavitation mixers, grinders and mills and at a fraction of the cost.

GELLING AND SOLUBILISING The solution of gums, alginates, C.M.C., carbopols, etc., can be a slow and difficult process if a conventional agitator or mixer is used. Agglomerates frequently form and these can only be removed slowly by the washing action of the agitator. The addition of a Silverson In-Line mixer to the system however will greatly reduce the process time and improve the product product quality and uniformity.

DE-AGGLOMERATION The Silverson rotor/stator workhead rapidly disintegrates and disperses agglomerates to give a totally uniform and homogeneous mix.

Silverson Service

EXPERIENCE AND KNOW HOW  Silverson has been the leader in High Shear Mixing technology for over 50 years and has built up a detailed and extensive knowledge of mixing process requirements. This accumulated knowledge enables our technical staff and sales representatives to clearly identify a client¡¯s needs and recommend the type of mixer most suited to provide an efficient and economical solution.

EXTENSIVE TEST FACILITIES  Available for the use of all clients, Silverson maintains a dedicated test facility equipped with a wide range of laboratory and production scale machines. Here customers may test new products and discuss their applications with our technical staff. If preferred, Silverson mixers can be provided for on-site trials at the customer¡¯s own premises to allow evaluation when operating under actual production conditions.

CUSTOMISATION Increasingly today¡¯s process manufacturers require equipment to be designed to meet their own particular needs. Silverson, working in close co-operation with the customer, has a positive approach and flexibility which allows custom designed and built mixers specifically suited to the individual user¡¯s requirements.

WORLDWIDE SUPPORT A truly international company, Silverson is represented by a network of associated companies, distributors and agents in over 40 countries, serving Europe, North America, Asia, Australasia, South America and Africa.

INSTALLATION Silverson offers expert advice on the installation of their equipment and, if required, our local technical staff can assist and supervise the installation and start up.

AFTER SALES SERVICE With over 50 years of experience Silverson realises the importance their customers place on reliable and rapid back-up service. Our large stock of manufactured parts enables us to despatch most standard spares the same day they are ordered.

How the Silverson Works

1.The high speed rotation of the rotor blades within the precision machined mixing workhead exerts a powerful suction, drawing liquid and solid materials into the rotor/stator assembly.

2. Centrifugal force then drives materials towards the periphery of the workhead where they are subjected to a milling action in the precision machined clearance between the ends of the rotor blades and the inner wall of the stator.

3. This is followed by intense hydraulic shear as the materials are forced, at high velocity, out through the perforations in the stator, then through the machine outlet and along the pipework. At the same time, fresh materials are continually drawn into the workhead, maintaining the mixing and pumping cycle.

Technical Specification

MATERIALS OF CONSTRUCTION Unless otherwise stated, all product contact parts are constructed in Grade 316 Stainless Steel. Where required,machines can be constructed in non-standard materials, such as carbon steel or Hastelloy.

MOTORS The standard range of motors available includes: TEFV: Totally Enclosed Fan Ventilated. ExN T3: Non-sparking EExd: Flameproof CENELEC/EURONORM/BASEEFA
Groups 2A, 2B, T1 - T4 IP55 Weatherproof/Hoseproof enclosure is standard for all motors. Other types of enclosures and standards i.e. C.S.A., U.L., or P.T.B. certified are available on request.

OPERATING PRESSURES All standard models are designed for operation on pressures not in excess of 40 psi (2.8 bar). These models can also be supplied with pressure ratings of 100 psi (7 bar) and 200 psi (14 bar). High pressure units, i.e. rated over 200p psi (14 bar) are available on request.

INLET AND OUTLET CONNECTIONS All standard sanitary screw or flange fittings are available on request (e.g. ISS, DIN, RJT, SMS, ASA, Tri-clamp etc.).

CLEANING Silverson In-Line mixers are designed for cleaning in place (CIP), a short run between successive operations in water, detergent or an appropriate solvent being all that is required. If manual cleaning is necessary, dismantling is easy and downtime minimal.

SEALING Single Mechanical Shaft sealing The In-Line mixer shaft is normally sealed by a single mechanical shaft seal with carbon versus ceramic faces and viton elastomers. Other elastomers and PTFE are available as optional extras. Tungsten carbide versus silicon carbide hard faces are recommended when processing mildly abrasive products.

Double Mechanical Shaft sealing Double mechanical shaft seals are required when processing products that are abrasive, sticky or viscous or when the system is under vacuum.The seals are mounted back to back in a chamber which must be flushed with a compatible non-flammable fluid at a pressure not less than 15 psi (1 bar) in excess of pressure in the system. This type of arrangement is suitable for operation under positive pressure, atmospheric pressure and vacuum. Sealant flushing systems can be supplied as an optional extra

Interchangeable Heads and Screens

A comprehensive range of workheads and screens is available for all Silverson high shear mixers. These easily interchangeabl workheads offer great versatility by allowing any machine to be adapted to perform a wide range of mixing operations including emulsifying, homogenising, disintegrating, dissolving, dispersing, blending, particle size reduction and de-agglomerating. Changing from one head or screen to another is quick and simple.

SQUARE HOLE HIGH SHEAR SCREEN The configuration and fine internal tolerances of this stator provide exceptionally high shear rates which are ideal for the rapid size reduction of soluble and insoluble granular solids. It is also suitable for the preparation of emulsions, gels and thickeners and fine colloidal suspensions.

EMULSOR SCREENS  These screens are suitable for liquid/liquid preparations and are especially useful for all emulsions. Emulsor screens are available in fine, medium or coarse perforations

GENERAL PURPOSE DISINTEGRATING HEAD Used for a wide range of applications, this head will give the greatest throughput. Suitable for the blending of liquids of similar or greatly varying viscosities, its uses also include the disintegration of solid and semi-solid materials.

SLOTTED DISINTEGRATING HEAD  For the disintegration of fibrous materials such as animal and vegetable tissue, as well as the disintegration and solubilisation of ¡°elastic¡± materials such as rubbers and polymers.

Standard Multi-purpose In-Line Mixers

The Silverson ¡°standard¡± series of multi-purpose In-Line mixers are able to perform the widest variety of applications - mixing, emulsifying, homogenising, disintegrating and dissolving - with an efficiency and flexibility unmatched by other machines. Each machine employs the special ¡°Interchangeable¡± Silverson Rotor/Stator Mixing Head, which allows it to be used on a wide variety of different products, while the robust and simple construction ensures that cleaning and maintenance are kept to an absolute minimum.

INTERCHANGEABLE WORKHEADS Interchangeable workheads are available to adapt the machine for varying processes. Changing from one head or screen to another is quick and simple.

NO BY-PASSING The In-Line mixer¡¯s design makes it physically impossible for any materials - liquid or solid - to pass from the inlet to the outlet without being subjected to intense mechanical and hydraulic shear as it passes through the rotor/stator workhead. By-passing is impossible.

SELF PUMPING Silverson In-Line mixers provide a centrifugal pumping action which, in many cases will be sufficient for the process flow requirements without the need for auxiliary pumps.

HYGIENIC CONSTRUCTION Designed to comply with FDA, 3A and GMP standards, these machines are ideally suited for industries where Cleaning In Place (CIP) procedures are the norm. Not only do these include the food, pharmaceutical and cosmetic industries but also more diverse industries such as chemicals and paints where modern manufacturing techniques and maximum equipment utilisation require a rapid changeover from one product to another. The high standard of finish and crevice free construction help set new standards in In-Line mixer hygiene.

EASY MAINTENANCE The robust and simple construction ensures that maintenance is easy and downtime minimal. Quick release nuts for the front cover are available on request.

VERTICAL IN-LINE Standard multi-purpose In-Line mixers are also available in a vertical configuration. Their construction allows additional inlets to be fitted where two or more individual ingredients need to be fed into an In-Line mixer.


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