Bottom Entry Mixers

Bottom Entry Mixers

Silverson’s sanitary 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 homogenization while the stirrer/scraper distributes the homogenized 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.

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.

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.

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.

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.


Bottom Entry Mixer


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, homogenizing, disintegrating, dissolving, dispersing, blending, particle size reduction and de-agglomerating.

Technical Information

5 - 2000 gallons.
Materials of Construction
All wetted parts in 316L stainless steel. Special material on request.
Motor Specification
TEFC, washdown duty and explosion proof motors are available as standard.
Stainless steel circular flange fitted as standard.
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.

BE243 1 3600 12 58 12 ¾ 58 6 5 4 6 x 716
BE275 2 3600 13 12 ½ 3 8 ¼ 7 5 6 x 916
BE387 5 3600 18 ¼ 18 ¾ 3 ¼ 10 ½ 9 ½ 7 ½ 8 x 916
BE425 7.5 3600 19 19 ¾ 3 ¼ 10 ½ 9 ½ 7 ½ 8 x 916
BE450 15 3600 24 ¾ 24 ¾ 18 10 ½ 9 ½ 7 ¾ 8 x 916
BE500 25 3600 24 26 4 ½ 12 10 ½ 7 ¾ 8 x 1116
BE600 40 3600 37 35 ½ 1116 12 10 ½ 8 ½ 8 x 1116

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

Silverson Bottom Entry mixers are typically used in conjunction with a stirrer/scraper unit. The Bottom Entry mixer gives high shear homogenization while the stirrer/scraper distributes the homogenized 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.

Sanitary Range

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

Ultramix Bottom Entry

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

Got a Question? Ask our Experts
Call us +1 (413) 525-4825