Micronizing and Drying Powders since 1955, Experts in Equipment Engineering and High Quality Contract Powder Processing.

Micro Jet

Particle Size Reduction Systems – (0.5-45 Microns)

The MICRO-JET is a horizontally oriented jet mill with tangential grinding nozzles located around the peripheral wall of the grinding chamber. Capable of grinding dry powders to 0.5-45 micron averages, this horizontal jet mill generates a maximum amount of “fines” resulting in high surface areas. Grinding and static classification both occur with a single, cylindrical chamber.

  • Sanitary designs for access to gas and product contact areas
  • Replaceable grinding nozzles and liners
  • Specialized liners for abrasive or sticky materials
  • Simple design ensures rapid disassembly for easy cleaning
  • Models from ½ to 6,000 lbs. per hour


Next Level in Fine Grinding Efficiency and Productivity

Unsurpassed Quality and Productivity in Ultra-Fine (0.5 – 45 Micron) Grinding Applications The MICRO-JET System delivers unsurpassed efficiency and effectiveness in the ultra-fine grinding and classification of a wide range and variety of materials. Each system is custom-engineered to meet a broad range of grinding applications. The design of the Micro-Jet jet mill makes operation simple and keeps production costs down. Systems are engineered for laboratory, pilot and full-scale production from 1 to 10,000 lb/hr.

Exceptional Fine Grinding

The MICRO-JET operates within a very narrow, adjustable range to provide 0.5 to 45 micron average finished product sizes.

Improved Grinding Efficiency

The air flow rate, air pressure and grinding pattern are easily adjusted by means of interchangeable grinding nozzles and liners. Individual MICRO-JET systems may be tailored to optimize both the desired particle size and the production rate.

No Mechanical Heat

As with our other fluid energy jet mills, the MICRO-JET milling machine may be used to grind heat-sensitive products with critical heat limitations. The cooling effect created by the expanding gases offsets the slight heat generated during the grinding and classifying processes.

Replaceable Liners for Enhanced Performance

Abrasive, sticky and contamination-sensitive products can all be processed by means of specialized MICRO-JET liners. Liners are available in alumina ceramic, tungsten carbide, silicon carbide, zirconia, PTFE, polyurethane, and others.

Simple Clean-up and Changeover

For batch runs and production that requires cleaning between runs, the MICRO-JET jet milling machine allows fast access to all product contact surfaces. The MICRO-JET is engineered for rapid disassembly without special tools.

Combined Operations

In the MICRO-JET system, grinding may be combined with other physical and chemical operations. This saves time, reduces energy and minimizes product handling. While grinding, the MICRO-JET can:

  • blending and grinding
  • coating and grinding
  • chemical addition
  • Reduced Production Costs

The Micro-Jet jet mill is engineered to provide maximum flexibility and production efficiency. Our application expertise enables us to provide the optimum systems for individual customer requirements.

Reliable Construction

The MICRO-JET system is constructed entirely in the USA of only the highest quality components. The low-maintenance design has no moving parts and can be opened quickly and easily for inspection or cleaning. All parts are made in the USA which guarantees rapid delivery of spare items. Comprehensive engineering and durable construction enable our system to operate continuously 24 hours a day, 365 days a year.

Engineering Support and Service

MICRO-JET mill testing is done at our facility in Pennsylvania where detailed process data can be obtained for your application. Fluid Energy engineers and quality service technicians are immediately available to provide technical assistance and to guarantee that the MICRO-JET System performs to your complete satisfaction.

Rental Systems

Most of Fluid Energy’s advanced jet mill systems are available on a rental basis to fulfill your immediate processing requirements.

Custom Processing

Fluid Energy maintains a facility for fine / ultra fine grinding of your material on a contractual basis. Other services include blending, drying and packaging. Our fully equipped QA laboratories are available for moisture, particle size and custom analyses of your products.

Efficient design and dependable operation
The MICRO-JET milling machine grinds and classifies in a single, variable cylindrical chamber. High-pressure air, gas or steam is introduced through specially designed nozzles, converting the potential energy of the compressed gas into a grinding stream of sonic or supersonic velocity. This elastic fluid creates a high-velocity helix that rotates around the center of the jet mill.

Raw materials are introduced into the grinding chamber through a venturi feed injector. The solid particles are entrained in the turbulent helical flow, causing them to collide. These high-velocity collisions pulverize the solids into micron and submicron particles. The particles stratify and grind each other in direct relation to their inertia. As the particles are reduced to the desired size, the viscous drag of the exhaust draws only the reduced particles into the discharge stream.


Typical Operating Parameters – Air

Mill Series# Production Capacity(lbs/hr) Production Capacity(kgs/hr) SCFM Air@ 70° F @100 PSIG m3/hr Air@ 21° C & 6.89 bar Steam, lb/hr @ 550° @70 F& 150 PSIG Steam, kg/hr @ 288° @70 C& 10.34 bar
4 1 – 50 0.5 – 20 25 – 75 40 – 125 50 – 200 20 – 90
8 3-100 1.5 – 45 50 – 150 85 – 255 400 – 1000 180 – 450
16 50 – 400 25 – 180 250 – 500 425 – 850 750 – 1500 340 – 680
20 75 – 600 35 – 270 400 – 800 680 – 1360 1000 – 2000 450 – 900
24 100 – 12,00 45 – 545 700 – 1200 1190 – 2040 1500 – 3000 680 – 1360
30 200 – 3000 90 – 1360 1100 – 1800 1870 – 3055 3000 – 5000 1360 – 2270
36 300 – 5000 135 – 2270 1700 – 2500 2885 – 4245 4000 – 7000 1815 – 3175
42 4000 – 10,000 181 – 4535 2400 – 3500 4075 – 5940 6000 – 9000 2720 – 4080


Micro-Jet Applications

The Micro-Jet is ideal for a wide range of ultra-fine to fine powder grinding and classification applications including:

  • Hard, Abrasive Materials: Minerals, Rare Earth Alloys
  • Heat Sensitive Materials: Pigments, Toners
  • Sanitary, Sterile Applications: Pharmaceuticals, Foods, Cosmetics
  • Agricultural Materials: Fungicides, Herbicides, Pesticides
  • Volatile Materials: Propellants, Explosives, Oxidizers
  • Synthetic Materials: Polymers, Plastics, Precipitates