Load-Well™ AVL compressed-air venturi loader
SS-304. Compressed air does the work, so there is no motor, no blower, no flap and no batch to meter. It conveys continuously until the material reaches the sensor.
Key features
- Continuous conveying: one run until the sensor sees material, then a short top-up — no flap, no gravity dump
- Capacitive level sensing through the sight glass; nothing in the flow path
- No-material alarm: if nothing arrives, the valve closes and the buzzer sounds within seconds
- Treatable conveying air that can be specified to ISO 8573-1, which suits pharmaceutical duty
- Two tri-clover clamps: receiver and sight glass come off by hand for cleaning
- Built to the duty: vessel volume, ports, mounting and height set for the machine being fed
Technical specifications
| Type | Compressed-air venturi loader |
| Conveying | Continuous — called by the level sensor, with a top-up time to fill the receiver |
| Control | Level sensor, fill timer and no-material alarm |
| Air control | Solenoid valve |
| Wetted parts | SS-304 |
| Receiver volume | 4.4 L standard; other volumes built to order |
| Level sensing | Capacitive, reading through the sight glass |
| Access | Two tri-clover clamps — receiver and sight glass |
| Exhaust | Cartridge filter above the receiver, or filter-bag arrangement |
| Port | OD 38 mm |
| Mounting plate | 210 × 210 mm |
| Overall height | 625 mm |
| Motor | None |
Conveying capacity depends on material, bulk density, air pressure at the jet, conveying distance and lift. Tell us those and we will quote the rate for your duty. Not recommended for flammable, explosive, liquid or semi-liquid materials.
Continuous conveying
- Delay
- Blower conveys a preset 15–20 s
- Flap drops, charge falls by gravity
Many cycles to fill a hopper; the conveying time is a fixed setting.
- Conveys until the sensor sees material
- Short top-up, so the receiver ends full
- Full: valve shut, no air used
Continuous conveying: full explanation
A conventional loader works to a timer. The sensor calls for material, a delay runs, the blower starts and conveys for a preset time — 15 or 20 seconds — and in that window the receiver fills to its own volume. The blower stops, the flap drops, the charge falls through by gravity, and after another delay the whole thing repeats. Filling a hopper takes many of those cycles, and the conveying time is a fixed setting.
The AVL conveys in one continuous run for as long as compressed air is available. Material flows until the sensor sees it, and a short top-up time then runs on so the receiver is left full. There is no flap, no gravity dump and no charge to meter.
That removes 3 things at once: the flap that can stick, the repeated free fall that breaks granules, and the conveying dose that has to be re-timed every time the material, the distance or the lift changes. The AVL's timer tops the receiver up. It does not decide how much material you get — the sensor does.
Capacitive level sensing
A capacitive sensor reads the material through the sight glass. The flow path is clear, with no mechanism for material to lodge behind or to clean around — and the operator can see the level the sensor is reading.
Control sequence
The loader runs on level first and time second. 4 states, and no operator input in any of them:
- Receiver full. The sensor reads material, the air valve stays shut and the machine uses nothing.
- Level drops. The valve opens and material conveys. It keeps conveying past the moment the sensor is covered, for the set top-up time, so the receiver ends the run full.
- Full again. The valve closes.
- Nothing arrives. If the sensor is still reading empty when that time is up, the valve closes and the buzzer sounds. The bin is empty, the wand has surfaced, or the line is blocked — and the operator is told about it in seconds.
The last state matters most. A loader running to a plain timer will convey air and starve the machine, and the fault shows up only as short mouldings.
Treatable compressed air for pharma (ISO 8573-1)
A blower loader draws its conveying air from the room. Whatever is in the plant atmosphere — dust, moisture, oil mist drifting off a neighbouring machine — travels through the material on its way to the filter. You can filter what comes out. You cannot specify what went in.
A venturi loader conveys on the plant's compressed air, and compressed air is a supply that can be treated: coalescing filtration, drying, activated carbon, a sterile final filter. Its purity can be specified against a standard — ISO 8573-1 — and certified by the air-treatment supplier. That is a conversation you can have with an auditor. Room air is not.
This only holds if the air is actually treated. A venturi fed from an untreated shop line is worse than a blower, because compressor oil and water go straight into the product. Ask us about the air train and we will tell you what it needs.
When to choose a venturi loader
A compressor returns roughly 1 unit of useful pneumatic work for every 7–8 units of electricity it consumes. Moving a kilogram of granule on compressed air therefore costs several times what the same kilogram costs on an electric blower.
But a venturi only spends while it is conveying. A machine that fills for a few seconds every few minutes has a very low duty cycle, and a high cost per kilogram multiplied by a small number of kilograms is a small number — while the blower you did not buy costs nothing to wire, nothing to service and nothing to house.
So the crossover depends on hours of conveying more than on kilograms. Below a certain daily demand this is the cheaper machine to own. Above it, a blower loader wins easily, and we will tell you which side of the line your duty falls on.
Quick-release cleaning
Each of the 2 tri-clover clamps has a job. The first drops the receiver off the machine. The second releases the sight glass so it comes out on its own.
The whole flow path opens by hand, in seconds, with nothing to unbolt — so a colour change or a material change is quick. Wetted parts are SS-304 throughout.
Options and custom builds
The exhaust can be taken through a cartridge filter mounted above the receiver, or fitted for a filter bag, depending on the material and the room it runs in.
The receiver is not fixed at 4.4 litres either. Vessel volume, port sizes, the mounting and the height are configured for the machine being fed — the figures above are our standard build, and other sizes are built to order. Tell us the material, the throughput, the lift and the run, and the machine is built for that duty.
The AVL is where the Load-Well™ range started — our story.
Other Load-Well™ loaders
SVL · SVL SS-304 · PVL · Compare all four
Load-Well is a trade mark of A.B. Plastech — application 6999170, Class 7.
Questions buyers ask
How does the AVL work without a motor?
Compressed air does the work through a venturi, so there is no motor, no blower, no flap and no batch to meter. It conveys continuously until the material reaches the sensor, then tops up.
What is the conveying rate?
It depends on the material, bulk density, air pressure at the jet, conveying distance and lift. Tell us those and we will quote the rate for your duty.
How is the level detected?
A capacitive sensor reads through the sight glass, so nothing sits in the flow path. If no material arrives, the valve closes and the buzzer sounds within seconds.
How is it cleaned?
Two tri-clover clamps hold the receiver and sight glass, and both come off by hand.
What size is it?
The standard receiver is 4.4 L, with an OD 38 mm port, a 210 × 210 mm mounting plate and an overall height of 625 mm. Other volumes are built to order.
How do I get a quote?
Call or WhatsApp +91 94160 55854, or send the quote request on the Contact page. Tell us the material, how much per hour and when you need it. We read every complete enquiry ourselves.
Request a quote for Load-Well™ AVL
Tell us the material, the throughput, the lift and the run, and we will tell you which loader fits — including when the answer is a different model from this one.
A.B. Plastech · Modern Industrial Estate, Bahadurgarh, Haryana
pawar@abplastech.co.in
abautomech@hotmail.com