Mineral Processing

Eliminate headaches in minerals conveying and processing with Precision solutions. We specialize in BOTH moving commodity materials and helping you process specialty high-value products. Our expertise includes processing lime, activated carbon, metallurgical coal, gypsum, talc, clay, silica, calcium carbonate, and many other minerals.

Maximize your revenue and ROI with greater reliability and constant uptime.  Precision equipment is a key ingredient in your profit margins and competitive edge.

Stay compliant with environmental regulations.   Precision solutions help you minimize creation of dust and help you contain it effectively, even when moving high volumes of material. 

Process high-value and specialty-blended products precisely too.   Precision is your best partner for both high-volume commodity processing AND for products that have smaller particle sizes, higher purity, or special additives.  We have rotary valve solutions that are ideal for fine grinding, size grading, washing, and blending.

Need to move special granular materials?  If you have a higher-value granulated material that likes “special handling” versus traditional processing, we can help.  We have rotary valves that work well with granulated formats without granule breakage, dust creation, and waste. 

Feeding high moisture content materials into a dryer?  Precision can make the process reliable, with less sticking or clogging of hard-to-handle materials and superior airlock performance.    Drying of raw ore or of a washed intermediate product is a common process step in several mineral sub-segments. 

Simplify maintenance with all of your rotary valves from a single source.  Precision allows you to standardize with one brand of drives and motors and even a common valve size.  Reduce costs of spares and technician training.  Our line is broad enough and deep enough to handle all of your needs.  And we stand behind everything with rapid turnarounds and industry-smart support.

Precision’s Done Right, On-Time Guarantee = faster deliveries, fewer spares.  When it’s time to rebuild or replace, Precision gets you the right solution, on YOUR schedule. No need to wait 10+ weeks for a replacement. We’re nearby and ready to go to work for you.  No need to carry excess spares.  

Mineral Processing Applications

Pneumatic Conveying Rotary Valves

REQUIREMENTS

Metering and airlock function or solely airlock function. Inject raw or finished products into pneumatic line.

PRECISION SOLUTION

Severe Duty version of the PMV-8 to PMV-20.

Transitions for slide-out/slide-in replacement of competitive valves.

Pneumatic line injectors.

KEY DIFFERENTIATORS

Tight tolerances minimize blow-by and maintains pneumatic system performance.

2X -3X useful life over commodity, cast-iron valves is typical.

PRECISION PRODUCT

PMV Modular Rotary Valve
PMV Modular Rotary Valve

Dryer Infeed Rotary Feeders – Low Moisture Applications

REQUIREMENTS

Moisture typically < 10%, metering to control the feed of minerals to dryer and airlock to minimize heat/hot-gas escape from the dryer.

PRECISION SOLUTION

Severe Duty version of the PMV-8 to PMV-20.

Transitions for slide-out/slide-in replacement of competitive valves

Pneumatic line injectors

KEY DIFFERENTIATORS

Tight tolerances minimize blow-by and maintains pneumatic system performance.

2X – 3X useful life over commodity, cast-iron valves is typical.

PRECISION PRODUCT

PMRD Rotary Feeder
PMRD Rotary Feeder

Dryer Infeed Rotary Feeders – High Moisture Applications

REQUIREMENTS

Moisture typically > 10%, metering to control the feed of minerals to dryer and airlock to minimize heat/hot-gas escape from the dryer.

PRECISION SOLUTION

Dual-rotor design that mechanically “sweeps” the rounded pockets on the upper / product rotor to prevent material build-up.

KEY DIFFERENTIATORS

Handles high-moisture minerals without costly operator intervention for clean-out.

Maintains a consistent feed rate to optimize drying and energy use.

PRECISION PRODUCT

PMDS Self-Cleaning Rotary Valve cutaway 2
PMDS Self-Cleaning Rotary Valve

Silo Discharge Rotary Valves

REQUIREMENTS

Withdrawing raw materials, intermediates, additives, or finished products from a silo and discharging into air-slides or screws

PRECISION SOLUTION

Severe Duty version of the PMV, from PMV-8 to PMV-28.

Beveled rotor vanes, MSHA guards, zero speed sensors, and air purge.

Transitions for slide-out/slide-in replacement of competitive valves.

KEY DIFFERENTIATORS

Leak-free, dust-free operation

Configurable to replace any existing rotary valve

2X -3X useful life over commodity, cast-iron valves is typical.

PRECISION PRODUCT

PMV Modular Rotary Valve
PMV Modular Rotary Valve

Rotary Valves for Granular or Pelletized Products

REQUIREMENTS

Minimize shearing and dust creation; withdrawing product from silo and discharge into pneumatic or other conveying systems.

PRECISION SOLUTION

Adjustable orifice plate to optimize feed rate.

MSHA guards and zero speed sensors.

Tri-Braze barrel & rotor for long life

KEY DIFFERENTIATORS

Large inlet/discharge and high-capacity rotor minimize pinch points

Wear-resistant for years of service

PRECISION PRODUCT

PMSE side-entry rotary valve
PMSE Side-Entry Rotary Valve

Dust Collector Rotary Valves

REQUIREMENTS

General dust control systems, process baghouses – mill systems, or ash collection from dryer, kiln, or furnace.

PRECISION SOLUTION

Severe Duty version of the PMV-8 to PMV-12.

Transitions for slide-out/slide-in replacement of competitive valves.

Dependable Nord drives

KEY DIFFERENTIATORS

Configurable to fit existing dust collectors

Tight tolerances to minimize fugitive dust

2X – 3X useful life over commodity, cast-iron valves is typical.

PRECISION PRODUCT

PMV Modular Rotary Valve
PMV Modular Rotary Valve

Mill Infeed Rotary Valves for Low Moisture Applications

REQUIREMENTS

Moisture typically < 10%, meter raw mineral to mill and minimize false air introduction into the mill, hammer mills, ball mills, classifier mills, and others.

PRECISION SOLUTION

Severe Duty version of the PMV, typically up to PMV-16.

Minimize surging or slugging of feed to mill by running smaller valves at faster speeds.

KEY DIFFERENTIATORS

Maintains consistent feed rate to the mill to optimize grinding performance

Valves available for materials up to 4″ particle size

2X – 3X useful life over commodity, cast-iron valves is typical.

PRECISION PRODUCT

PMV Modular Rotary Valve
PMV Modular Rotary Valve

Mill Infeed Rotary Valves for High Moisture Applications

REQUIREMENTS

Moisture typically > 10%, meter raw mineral to mill and minimize false air introduction into mill, hammer mills, ball mills, classifier mills, and others.

PRECISION SOLUTION

Dual-rotor design that mechanically “sweeps” the rounded pockets on the upper / product rotor to prevent material build-up.

KEY DIFFERENTIATORS

Handles high-moisture minerals without costly operator intervention for clean-out

Maintains consistent feed rate to mill to optimize grinding performance

PRECISION PRODUCT

PMDS Self-Cleaning Rotary Valve cutaway 2
PMDS Self-Cleaning Rotary Valve

Rotary Valves for DSI/FGD Pollution Control Systems

REQUIREMENTS

Systems injecting lime, trona, activated carbon, fly ash, bottom ash, or other sorbents for treating flue gas discharge for SOx or NOx.

PRECISION SOLUTION

Severe Duty version of the PMV-8 or PMV-10

Pneumatic line injectors

Nord inverter-duty drive motors

KEY DIFFERENTIATORS

Durability that handles lime, trona, or activated carbon

Tight tolerances minimize blow-by and maintains pneumatic system performance

2X – 3X useful life over commodity, cast-iron valves is typical.

PRECISION PRODUCT

PMV Modular Rotary Valve
PMV Modular Rotary Valve