BULK SOLIDS & POWDER HANDLING
Flow-control solutions for powders, granules, pellets, and abrasive materials
Bulk-solids systems place unusual demands on valves: abrasive particles, high conveying velocities, vacuum, material head load, dust, buildup, and frequent cycling. These application examples show where pinch valves fit and what must be verified before selection.
CHOOSE BY APPLICATION
The conveying method changes the valve requirement
Gravity discharge, positive-pressure conveying, and vacuum conveying can involve the same powder but impose different loads on the valve. Selection should begin with the material, system pressure, valve location, and operating sequence.
| Process requirement | Key selection issue | Relevant product line |
|---|---|---|
| Pneumatic conveying of abrasive bulk materials | Velocity, wear, pressure, and required fail position | AKO air-operated pinch valves |
| Vacuum conveying and suction lines | Negative-pressure effect on the sleeve and vacuum compensation | AKOVAC and pinch-valve accessories |
| Silo filling and hopper discharge | Material head load, geometry, orientation, and cycling | AKO pinch-valve range |
| Abrasive-service maintenance | Sleeve compound, inspection interval, and spare-part planning | Genuine AKO replacement sleeves |
| Liquid binders or additives used with dry materials | Fluid properties, flow range, accuracy, pressure, and output | Titan flowmeters where liquid measurement is required |
APPLICATION EXAMPLES
Bulk-solids valve case studies and selection guidance
Two documented installations show how AKO pinch valves are configured for abrasive positive-pressure service and vacuum conveying. The silo and hopper guide broadens those lessons into a practical selection checklist.
Abrasive ingredients for polymer-concrete production
A drainage-system manufacturer uses DN80 and DN100 VF Series valves to control quartz sand, calcium carbonate, basalt grit, glass, and binding agents in 24-hour production.
Flanged VF Series valves use abrasion-resistant natural-rubber sleeves. Selected valves include safety arrangements to maintain the required closed position after loss of air or power.
- Media
- Abrasive mineral ingredients and binders
- Operation
- Approximately 140 cycles per day
- Experience
- More than 25 years reported by AKO
Diatomaceous earth from tanker unloading to filtration
A brewery uses DN80 and DN100 VMC Series pinch valves to move diatomaceous earth through vacuum unloading, silo storage, distribution, and beer-filtration equipment.
Stainless VMC Series valves with food-grade natural-rubber sleeves use AKOVAC vacuum support and centrally controlled safety arrangements.
- Medium
- Diatomaceous earth filtration aid
- Service
- 500 mbar vacuum reported by AKO
- Installation
- Horizontal and vertical
Selecting pinch valves for silo and hopper discharge
A valve below a storage vessel can see material head load, packing, impact, and bridging that are not described by pipe size alone. The vessel geometry, material height, bulk density, outlet size, conveying method, and valve orientation all matter.
Define the material, load at the outlet, normal and maximum pressure, flow mode, cycle rate, sleeve compatibility, actuation, fail position, and environmental requirements.
PRODUCT-LINE FIT
AKO is primary; Titan applies to associated liquids
The main bulk-solids equipment on this page is AKO pinch-valve technology. Titan flowmeters become relevant only where the same process also measures a liquid binder, resin, coating, preservative, or additive. We do not present a flowmeter as measuring the dry bulk material itself.
AKO Pinch Valves
Isolation and selected control duties for powders, granules, abrasive media, pneumatic conveying, vacuum conveying, and storage discharge.
Explore AKO pinch valves →Titan Flowmeters
Measurement of compatible liquid binders or additives where flow range, viscosity, pressure, materials, and output have been defined.
Explore Titan flowmeters →SELECTION QUESTIONS
Common bulk-solids pinch valve questions
Why are pinch valves used for powders and abrasive bulk materials?
When fully open, a pinch valve can provide a smooth, unobstructed sleeve bore without a disc, gate, or seat in the material stream. The sleeve is the primary wear component and can be replaced separately from the complete valve. Actual suitability depends on the material, velocity, pressure, temperature, cycling, and sleeve compound.
Can a pinch valve operate in a vacuum-conveying line?
Yes, when the valve and controls are selected for the negative-pressure condition. Vacuum can contract an unsupported sleeve, so the maximum vacuum and differential pressure must be defined and an appropriate AKOVAC or bypass arrangement may be required.
What information is needed for a valve directly below a hopper?
Provide the material, particle size, bulk density, material height above the valve, vessel and outlet geometry, line size, valve orientation, operating pressure, temperature, desired flow behavior, cycle rate, and required fail position.
How is the correct sleeve compound selected?
Abrasion resistance is only one factor. Chemical compatibility, temperature, pressure, particle characteristics, velocity, food-contact requirements, conductivity, and expected maintenance interval must be considered together.
Can a pinch valve control flow as well as shut it off?
Pinch valves can be used for on-off and selected control duties. The achievable control behavior depends on the material, valve geometry, actuator, regulator or positioner, pressure conditions, and operating range. Bulk-solid dosing may require a trial or application review.
APPLICATION SUPPORT
Send us the material and system conditions.
Basecamp Process Components supports U.S. and Canadian customers with application review for AKO pinch valves, sleeves, vacuum support, controls, and related Titan liquid-flow measurement.