NIMIX Liquid
Diode Mixers
This unique non-intrusive mixing technology has been researched and developed over a 10 year period by the UK-based BHR Group and has worldwide patents. Mixing is accomplished through a fluid diode principle — without the introduction of a rotating or reciprocating shaft.
What NIMIX Offers
A totally enclosed “zero particulate” environment, intrinsically safe and emission free
Powerful top to bottom circulation; handles both Newtonian and non-Newtonian fluids as well as highly loaded slurries
Solids draw-down with minimal overhead vapor incorporation
Low shear mixing for shear sensitive materials
10:1 turndown capability for small batches
CIP capability with optional spray-balls
Separate vessel and drive variants for intermediate bulk containers
Polish available for food and pharmaceutical applications
All wetted materials are 316SS and food and pharmaceutical grade PTFE
Low noise levels (<80 dBA)
Complete drain-down
Simple and highly reliable drive system
Principle of Operation
Mixing is accomplished through a fluid diode principle. When the diaphragm is pulled down, significantly more fluid is drawn through the peripheral openings than through the central opening. When the diaphragm is pushed upward, more fluid preferentially flows through the central opening. This motion causes a flow pattern in the tank with fluid moving centrally upward and down at the wall.
This principle of mixing makes the NIMIX Mixing System ideal for variable batch sizes. There's no need to worry about where the impeller is located and whether or not there will be sufficient agitation to accomplish mixing — a major advantage for systems which must be capable of suspending solids until essentially the entire vessel is emptied.
The major components
1. A cylindrical vessel with a conically truncated lower head and dished top head. 2. A diode plate attached to the lower head that has one centrally located opening which is fluted upward and a series of peripheral smaller openings which are fluted downward. 3. A diaphragm attached to the lower head. 4. A floor mounted drive system with an optional VF drive system.
Blending Performance
Mixing studies have characterized the blend time in dimension-less terms, which permits blend times to be computed for any system. The chart plots dimension-less blend time (f·t99, to 99% uniformity) versus the Reynolds number through the central diode plate orifice:
Superior at higher viscosities
The pumping chamber behaves somewhat similarly to a positive displacement, diaphragm pump. Flow rate does not change significantly with viscosity, so blending efficiencies are superior to those of high efficiency impeller systems at higher viscosities.
250-Gallon IBC Systems
Intermediate Bulk Container (IBC) Systems provide a separate vessel and drive system, allowing one drive system to serve any number of vessels — whether moving one product between processing centers, or running multiple products through one processing center.
The NIMIX IBC System fulfills the requirements for UN-type approval of a metal IBC according to ADR agreement, RID-regulations and IMDG-code, and NIMIX systems have passed the 1 hour vibration test in accordance with 49 CFR, Subpart 0, Paragraph 178.819.
Handles batch sizes as small as 26 gallons (100 liters)
Does not have shafting or baffles to accumulate material
Completely contains vapors, no particles from seals or intrusion of contaminants
Easily re-suspends settled solids
Specifications
| Standard sizes | 100 / 1000 / 2000 / 5000 L · 26 / 260 / 530 / 1300 gal |
| Wetted materials | 316SS and food and pharmaceutical grade PTFE |
| Noise | <80 dBA |
| Turndown | 10:1 |
| Cleaning | CIP with optional spray-balls · complete drain-down |
| Finish | Polish available for food and pharmaceutical applications |
| Drive | Floor mounted drive system, optional VF drive |
NIMIX® is a registered trademark of BHR Group Ltd. Chemineer® is a registered trademark of Chemineer, Inc.
Talk to a NIMIX specialist
Cal West Mashy — Chemineer representative for California & Nevada.