After Airflow and Suction, today we look at a number everyone understands at first sight: Tank Capacity (L). It looks like the simplest line in the parameter table. But it quietly decides two things: how often you must stop and empty the machine — and how heavy the machine is.
What Is Tank Capacity?
Tank Capacity = the effective volume of the dust bin.
Simple words: how much dust fits inside before you must empty it.
One small note: this is the effective volume — the space that really holds dust. It is not the size of the whole machine body. A 70 L machine is much bigger than a 70 L box, because it also carries the motor, the filter, and the wheels.
Capacity Decides How Often You Stop
The bigger the tank, the longer you work before emptying. You can estimate it with one line:
Emptying stops per shift ≈ dust volume per shift ÷ tank capacity
Example: about 90 L of dust per shift → a 30 L tank means ~3 stops, a 100 L tank means ~1 stop.
Every stop costs time: power off, open the machine, carry or roll the tank, dump the dust, come back, restart. One stop may take 5–10 minutes. Three stops a day, every day, is a lot of lost work time in one year.
💡 Pro Tip
Light dust fills a tank fast even though it weighs nothing — a workshop full of flour or cotton lint can fill 70 L quickly. Heavy material is the opposite problem: 100 L of steel grit is extremely heavy to carry. So check both: how much dust you make, AND what it is.
From 30 L to 140 L: Real Numbers from the Catalog
Here are real tank sizes from the ENDUSTMAN catalog, from small to big — with the machine weight that comes with them.
Model | Series | Tank Capacity | Weight | Made For |
|---|---|---|---|---|
EHTS30C | 380V Cleanroom Vacuum | 30 L | 65 kg | Cleanrooms, food & pharma; compact and low-noise |
EATD36 | 220V Split-Tank Vacuum | 70 L | 37 kg | Daily factory floor cleaning; light and mobile |
EAFD36 | 220V Split-Tank Vacuum | 100 L | 53 kg | Bigger areas, longer cleaning runs |
EHFD75 | 380V Heavy-Duty Vacuum | 100 L | 152 kg | Steel grit, stones; continuous heavy work |
EHFD75M | 380V Pulse-Clean Vacuum | 120 L | 177 kg | 24/7 lines with auto pulse filter cleaning |
EHFD250M | 380V Pulse-Clean Vacuum | 140 L | 340 kg | The biggest: non-stop heavy dust collection |
From 30 L to 140 L, the tank is about 4.7 times bigger. But look at the weight too: from 37 kg to 340 kg — almost 9 times heavier. The small 30 L EHTS-C serves a cleanroom corner and moves easily between rooms. The 140 L EHFD-M big models stand next to a production line and work all day, every day. Same parameter, completely different machines.
Real Numbers from the ENDUSTMAN Catalog
Now let’s look at real models. The table below shows airflow numbers from small to big, and what each level is good for.
Model | Series | Power | Airflow | Best For |
|---|---|---|---|---|
EATD12C | 220V Cleanroom Vacuum | 1200 W | 268 m³/h | Cleanrooms, food & pharma, fine dust |
EATD24 | 220V Split-Tank Vacuum | 2400 W | 320 m³/h | Factory floor dust, cement, flour |
EHTD40 | 380V Compact Split-Tank | 4000 W | 410 m³/h | Metal chips, glass, sand; continuous work |
EHFD75 | 380V Heavy-Duty Vacuum | 7500 W | 540 m³/h | Steel grit, stones, heavy debris |
EHFD250 | 380V Heavy-Duty Vacuum | 25 kW | 1450 m³/h | Large factories, very heavy dust load |
ECH22M | Large Dust Collector | 22 kW | 12800–23500 m³/h | Whole production lines, many suction points |
Look at the gap. From 268 m³/h (EATD12C) to 1450 m³/h (EHFD250), the airflow is more than 5 times bigger. And the ECH22M dust collector, at up to 23500 m³/h, is about 88 times the EATD12C. These are not “better” or “worse” machines. They are machines for completely different jobs: one cleans a cleanroom corner, the other serves a whole production line.
📝 Why Do Bagging Models Show “Bagging System” Instead of Liters? In the catalog, the EAFS36B and the EHFS-B series (EHFS22B–EHFS75B) do not list a liter number at all — the capacity line says “Bagging system”. The reason: these machines have no fixed tank. Dust goes straight into a continuous bag, and you cut and tie the bag when it is full. The “capacity” depends on the bag, and disposal is sealed — the dust never flies back into the air. This is ideal for fine or harmful dust, and for materials you want to bag and recycle directly.
The Price of a Big Tank
A big tank means fewer stops. But it is not free. You pay with three things:
⚠️ Bigger Is Not Better Here: If your workshop needs only 30 minutes of cleaning per day, a 140 L machine gives you capacity you never use — plus 340 kg of weight, a bigger footprint, and a higher price. Buy for your real dust volume, not for the biggest number in the catalog.
💡 Pro Tip
Worried a big tank is hard to empty? Look for the split-tank quick-detach design (EATD, EAFD, EHTD, EHFD series — it is right there in the series names). You unlock and detach the tank, roll or carry only the tank to the waste point, and clip it back. The heavy motor head stays on the machine. Even a 100–140 L model can be emptied by one person.
How to Choose: Dust per Shift + Your Labor
Two questions decide your tank size: how much dust do you make in one shift, and who empties the machine, and how. Then use this guide:
In Short
Tank Capacity is the effective dust bin volume. Bigger tank = fewer emptying stops, but also more weight, more size, and less mobility. Estimate your dust per shift, think about who empties the machine, and remember the split-tank and bagging designs that make disposal easy. The right tank size is the one that matches your shift — not the biggest one in the table.
- What Is Airflow in Industrial Vacuums? Decoding m³/h and L/min
- What Does Suction (kPa) Really Measure? Understanding Vacuum Pressure
- 30 L to 140 L: Bigger Tank Isn’t Always Better
- Manual Back-Blow vs Auto Pulse Cleaning: What the Cleaning Method Spec Really Costs You
- 64 dB vs 88 dB: Reading the Noise Level Spec
- Filter Area: The Parameter That Decides Whether Suction Fades
