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Bottom Entry Mixers

Bottom Entry Mixers

Silverson’s hygienic series of high shear Bottom Entry mixers are designed to fit into the bottom or side of a mixing vessel. These high shear mixers are typically used in conjunction with a slow speed anchor stirrer or scraper unit for high viscosity products. The Silverson Bottom Entry mixer gives high shear homogenisation while the stirrer/scraper distributes the homogenised output uniformly through the vessel. This is ideal for high viscosity cosmetic, pharmaceutical and food products.

Bottom Entry mixers can also be used by themselves on low viscosity products and to wet out powders. Silverson Bottom Entry mixers offer full compliance with cGMP and USDA requirements.

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How It Works

The advantages of Silverson’s Bottom Entry mixer over simple conventional stirrers or agitators stem from the multistage mixing/shearing action as materials are drawn through the specially designed Silverson workhead - the heart of every machine.

Bottom Entry Mixers
Stage 1

The high speed rotation of the rotor blades exerts a powerful suction, drawing liquid and solid materials downwards into the center of the workhead.

Bottom Entry Mixers
Stage 2

Centrifugal force then drives the materials towards the periphery of the workhead where they are milled in the clearance between the rotor and the stator.

Bottom Entry Mixers
Stage 3

The materials are subjected to intense hydraulic shear as they are forced out through the stator and projected radially at high speed towards the sides of the mixing vessel. Fresh material is simultaneously drawn into the workhead, maintaining the mixing cycle.


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Bottom Entry Mixer

Workheads

A comprehensive range of workheads and screens is available for all Silverson high shear mixers. These interchangeable 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.

Technical Information

Capacity
5 - 7000 litres.
Materials of Construction
All wetted parts in 316L stainless steel. Special material on request.
Motor Specifications ​
TEFV and ATEX approved Flameproof motors are available as standard. Inverter rated, stainless steel and other motors are available as optional extras.
Mounting
Stainless steel circular flange fitted as standard.
Sealing
Single or double mechanical shaft seals available as standard.
Operating Pressures
From full vacuum up to 150psi (10 Bar). Higher pressure units are available on request.

Bottom Entry Mixers
kW R.P.M TEFV A EExD A B C D E F
BE243 .75 3000 320 322 67 152 127 102 6x11
BE275 1.1 3000 312 318 77 210 178 128 6x14
BE387 2.2 3000 372 383 80 267 241 190 8x14
BE425 4 3000 432 443 83 267 241 190 8x14
BE450 7.5 3000 512 520 99 267 241 197 8x14
BE500 15 3000 605 605 113 305 267 197 8x17
BE600 22 3000 667 672 120 305 267 216 8x17

The dimensions shown are approximate only and certified diagrams should be used for installation
purposes. Silverson reserves the right to change dimensions and specifications without notice.

Mixer Options

Bottom Entry Mixer Bottom Entry Mixer - UK
Bottom Entry Mixer

Silverson Bottom Entry mixers are typically used in conjunction with a stirrer/scraper unit. The Bottom Entry mixer gives high shear homogenisation while the stirrer/scraper distributes the homogenised output uniformly throughout the vessel. This is ideal for high-viscosity cosmetic, pharmaceutical and food products. They can also be used on low viscosity products to wet out powders. Clean-in-place design with a simple, easy to clean construction.

Bottom Entry Hygienic Range - UK
Hygienic Range

Silverson has advanced their line of Bottom Entry mixers to offer an ultra hygienic unit incorporating several options, including minimised number of product contact parts, electro-polished finish and special hygienic shaft seals.

Ultramix Bottom Entry - UK
Ultramix Bottom Entry

The Ultramix can be supplied as a Bottom Entry unit, ideal for ultra-hygienic applications in the pharmaceutical and food industries.

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