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A mobile grain suction machine is a wheeled or skid-mounted pneumatic conveyor. It lifts grain and similar free-flowing bulk solids through a flexible hose, separates them from the conveying air on the machine, and discharges them into a bin, silo, truck, or the next machine in the line. It is chosen where grain must be moved from a point a fixed conveyor cannot easily reach, moved only occasionally, or moved from several points using one machine.
In pneumatic suction, often called vacuum conveying, a blower pulls air through a hose whose open end is placed in the grain. The air stream carries grain and dust into a cyclone or separator vessel on the machine. Air and product then separate: grain falls to an airlock or rotary valve and is discharged, while the air passes through filters and is released. Because the product travels in a closed path from nozzle to discharge, dust is largely contained instead of being released at the transfer point.
Most units in this class are offered with an electric motor or a diesel engine, and some with both, so the machine can work where a suitable power supply is not available. They normally run on castors or wheels, sometimes on a frame that can be lifted by forklift.
It is a transfer device. It does not clean grain, dry it, or sort it. A cyclone or small aspirator on the unit removes the lightest fines and dust; it is not a cleaning house and will not take out stones or other heavy impurities. It also does not replace silo aeration or moisture control. Where moisture matters, ask whether the unit can run alongside or be interlocked with existing moisture equipment, rather than expecting the machine to control moisture itself.
No general answer applies. It depends on how often a route runs, how often the pickup point changes, and what the site allows.
| Handling situation | Mobile suction unit | Fixed conveying system |
|---|---|---|
| Unloading trucks, barges or wagons at changing positions | Usually practical: the nozzle goes to the load | Only where the discharge point is fixed and repeated |
| Filling or emptying several silos from one spot | Usually practical: one unit moves between them | Only where a dedicated route serves each silo continuously |
| Occasional or seasonal campaigns | Usually practical: one unit covers several jobs | Only when the route runs for long periods |
| One product on one route, running continuously | Rarely the simplest arrangement | Usually simpler and easier to automate |
| Very long horizontal runs, or tight headroom | Limited by hose length, lift and bends | Usually the better fit where a route can be built |
| Several products through the same path | Depends on how the unit is cleaned between products | Depends on whether the fixed line can be purged |
| Variable | What it changes | What to measure or ask |
|---|---|---|
| Hose diameter | Air volume, and the largest particle that passes | Compare with your largest grain or pellet |
| Hose length and bends | Pressure loss, and usable capacity at the nozzle | Count horizontal run, lift, and every elbow |
| Vertical lift | The head the blower must overcome | Measure floor to discharge |
| Product bulk density | Mass moved for a given air stream | Ask what assumption sits behind a quoted figure |
| Product fragility | Breakage risk in the air stream | Air velocity is the setting to check |
| Fines and dust content | Filter load and how often attention is needed | Ask about filter area and cleaning method |
| Power source | Where the unit can be used and how it moves | Electric supply details, diesel, or both |
Some catalogue pages for this class quote a capacity band of 50-200 t/h with a suction range of around 15 m. Treat such figures as nominal band values rather than a promise for your route: the real rate depends on the product, the lift, the hose, and the discharge conditions.
Dust control is often the main hygiene reason plants choose suction transfer at all. Ask about the filter arrangement, how the separator is emptied, and whether the filter can be cleaned or replaced without tools. For food and feed work, also ask about materials of construction, contact-surface finish, whether the hoses are suitable for food-contact use, and how the unit is cleaned when the product changes. Bonding and grounding of hose and frame matter too, because dry grain in a fast air stream can build static.
This class of machine is sold into wheat, maize and corn, rice, barley, sorghum and oat handling; into pulses such as lentils, chickpeas, peas and beans; into oilseeds such as soybean, sunflower and rapeseed; and into coffee bean transfer. Those products differ in bulk density, particle shape, and how easily they break, so settings that suit one will not suit another. Bring site constraints into the same conversation: headroom, door and gate widths, the point load the floor can carry, indoor or outdoor working, and any hazardous-area classification.
As a supplier and export partner rather than a manufacturer, WUXI HASEN works from your product, route, and existing plant when matching a mobile suction unit or the parts around it, rather than from a fixed catalogue.
The flexible hose and nozzle take the most wear, because they carry the abrasive grain and are handled constantly. Next are filters and gaskets, then the rotary valve or airlock at the discharge, and finally bearings and blower components, which wear according to hours run and how much dust reaches them.
Hoses, nozzles, filters, gaskets, and rotary valve parts are the usual repeat items. WUXI HASEN matches grain machine parts by dimension, photo, and part number; see Flour Mill Parts for the parts route and Grain Machines for the machine range.
It transfers grain and similar bulk solids by air, through a hose, from wherever the nozzle can be placed to a bin, silo, truck, or the next machine.
Usually yes, within the range the machine is built for, but settings and cleaning change with the product. Ask which products the design is intended for, and how the unit is cleaned between them if cross-contact matters.
It depends on hose diameter, hose length, vertical lift, and the number of bends, which together set pressure loss. Supplier literature for this class often quotes a suction range of around 15 m, but usable distance shrinks as lift and bends increase.
Air velocity is the deciding factor. A gentle, low-velocity setting breaks less grain, while high velocity moves more product but increases impact. For delicate products, ask how air velocity is set and controlled.
Neither is better in general. Mobile units suit changing routes, short campaigns, and awkward sites; fixed systems suit a single product on a fixed route that runs continuously.
Product travels in a closed path from nozzle to discharge, and air leaving the separator passes through filters. That contains most dust if filters are seated and cleaned.
The flexible hose and nozzle normally wear first, because they carry the abrasive product and are handled constantly. Filters, gaskets, and the discharge rotary valve are the next items to plan for.
Send the product or products, the required rate, the horizontal distance, the vertical lift, and the number of bends; the discharge point and what it feeds; the power available; and your dust and hygiene requirements. Photographs of the receiving point and of any existing machine help. With those details, WUXI HASEN can suggest a suitable configuration and the parts that go with it. You can also compare the wider range in Flour Mill Machines and Animal Feed Machine Line, or reach us through Contact us and amina@immyhitech.com.
Wuxi Hasen Import And Export Co.,Ltd
Contact：Amina Zhu
Mobile：+8613812016908
Email：amina@immyhitech.com
Add：#68,Xindongan Rd,Xinwu Distt,Wuxi,Jiangsu,China 214000
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