Table of Contents
Decanter Centrifuge – What is it?
A decanter centrifuge is a heavy-duty, industrial separating machine. It separates solids from one or two liquids using centrifugal force. Solid particles need to have a higher density than the liquid for a decanter centrifuge to work. Stoke’s law determines the separation efficiency.
How Does It Work?
Types of Decanter Centrifuges
2 Phase Decanter
3 Phase Decanter aka Tricanter
The following table lists some of the essential technical specifications of these horizontal centrifuges. Of course, each manufacturer has a slightly differentiated specification. In general, high quality, decanter centrifuges have similar properties.
|Material of Construction (MOC)||316L Stainless Steel (established, high quality brands)|
|Max. Bowl RPM||2,000 ~ 6,500|
|Bowl Diameter||6" to 60"+|
|G-Force (Centrifugal Force)||4500 G's Max.|
|Particle Size Separation Range||50 µm to 1/2"|
|Processing Capacity||5 GPM to over 1,500 GPM|
|Drive Power||5 HP to Over 150 HP|
|Size (Footprint)||2' x 4' to 8' x 15'|
|Differential Speed||1 ~ 25 RPM|
|Gearbox Type||Planetary Gearbox; 1 kN-M to 3.5 kN-M Torque|
Sizes & Capacities
Prospective buyers should consider some crucial aspects listed below.
Decanter centrifuges are considered capital equipment based on their expected operating life and durability. Their price depends on the manufacturer and size/capacity.
A new machine (from a quality, established manufacturer) starts from around $50K for a small capacity unit to over $1M for a large capacity machine. Accessories such as explosion-proof upgrades, control systems, pumps, etc. are optional and add to cost.
Remanufactured models range from 40% to 60% compared to new models of similar capacity.
Decanter centrifuge operating costs can be categorized as follows.
Maintenance & Service
New versus Remanufactured
Important considerations before buying a remanufactured decanter centrifuge
- Manufacturer of the original centrifuge.
- Credentials & experience of the re-manufacturer.
- Previous use.
- Wear status of the bowl and conveyor.
- Parts used in the rebuild – especially bearings.
- Balancing of major rotating components.
- Vibration check and complete testing of the centrifuge assembly per OEM specifications.
We have condensed 35 years of our centrifuge specialty into a 9 Step Guide to Selecting Your Perfect Industrial Centrifuge.
Decanter centrifuges are perfect for the separation of liquids from high amounts of solids. In real terms, they can separate over 50% (v/v) solids from liquids continuously. Decanter centrifuges can produce up to 4000 g’s of centrifugal force, which is sufficient to separate particles down to 50µ.
The following are some of the industries using our remanufactured machines.