VAC STAC Compact Vacuum Ejector, Stackable by Design
The VAC STAC is a compact vacuum ejector that generates vacuum right at the tool and scales by stacking: add an Expansion module as your gripping area grows instead of buying a bigger pump. Mounting the ejector directly at the tool keeps hose lengths short, cuts response time, and shortens evacuation on every cycle.
Lightweight, modular, and adaptable, it is built to work inside our EOAT ecosystem alongside grippers like the Spider Gripper (SPI) and the Area Surface Gripper (ASG), designed and manufactured in Canada, supplied and supported for Europe from Eindhoven.
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VAC STAC Modularity
VAC STAC
Modular vacuum that grows with your application.
Stack up for more flow. Stack out for more zones.
The building block
One VAC STAC. Two ways to grow.
Stack vertically
More flow. Add an Expansion to a Primary: 3 ejectors and up to 520 l/min on a single vacuum zone.
Stack horizontally
More zones. Run 7 or more Primary modules side by side, with one vacuum zone per VAC STAC.
Option 1: vertical stack
Stack up for more flow
Primary: works on its own
1 ejector, plus the solenoid valve and electronics. Every system starts with one.
Expansion: nearly doubles the flow
Adds 2 ejectors to a Primary. It never runs alone, and only one fits per stack.
Always one zone
The Primary’s solenoid switches all ejectors together.
Option 2: horizontal stack
Stack out for more zones
Scale to 7 or more Primary modules side by side, 266 l/min each.
One zone per VAC STAC, each with its own vacuum circuit.
Pick selectively: run zones together or one at a time.
Side by side
Vertical vs. horizontal at a glance
| Feature | ↑ Vertical stack | → Horizontal stack |
|---|---|---|
| Grows | Up: more flow | Out: more zones |
| Building blocks | Primary, or Primary + 1 Expansion | Primary modules side by side |
| Ejectors | 1 or 3 | 7 or more |
| Flow per zone | 266 or 520 l/min | 266 l/min |
| Vacuum zones | Always 1 | Multiple, 1 per VAC STAC |
| Best fit | Single pick zone that needs more flow | Large, multi-part or selective picking |
Need more flow? Stack up.
Need more zones? Stack out.
Tell us about your application and we will configure the right VAC STAC and gripper.
Request a QuoteSee It in Action
Watch the VAC STAC generate vacuum directly at the tool. No motors, no moving parts, no maintenance schedule; compressed air in, gripping vacuum out.
Same Design, Real Cell
We built the animation from the same CAD our engineers print from and matched its movement to a real robot cell. Then we filmed the real thing. Same tool, one air line, one cable.
Primary and Expansion
Drag to rotate, scroll to zoom. Hover the marked points for details.
VAC STAC Primary
VS-D1-PRM-A-2201 | ANU002270
The Primary is the module that connects to the robot and carries the complete control interface: the vacuum and blow-off valves, the vacuum sensor port, and the electrical connection. A single integrated venturi generator delivers up to 266 l/min of suction flow through two G1/4 vacuum access ports, enough for most single-zone gripping tasks on its own.
VAC STAC Expansion
VS-D1-EXP-A-2201 | ANU002271
The Expansion mounts under the Primary when your gripping area grows. It adds two more venturi generators and raises the total suction flow of the stack to 520 l/min, with no extra electronics, no separate plumbing, and no changes to your control setup. Pure added flow in the same footprint.
Stack Up for Flow, Stack Out for Zones
Traditional vacuum systems put a large pump at the end of a long hose, so the pump size dictates the tool and the hose length dictates the response time. The VAC STAC flips that: compact ejector modules stack to match the flow your gripping area actually needs, mounted directly at the tool. The result is faster evacuation, shorter response time, less compressed air wasted in dead volume, and a vacuum supply that grows with the application instead of being replaced by it. Need more vacuum zones instead of more flow? Run Primary modules side by side, each with its own vacuum circuit.
How a Compact Vacuum Ejector Works
A vacuum ejector converts compressed air into vacuum through the venturi principle: air accelerates through a nozzle, pressure drops, and the low pressure zone evacuates the gripping circuit. No motors, no maintenance schedule, just geometry doing the work, which is exactly the kind of problem 3D printing is built for. That is why the VAC STAC weighs 340 grams instead of kilograms.
Pick, Place and Palletize
The same cycle filmed from the front and from above.
VAC STAC at a Glance
| VAC STAC PrimaryVS-D1-PRM-A-2201 | ANU002270 | VAC STAC ExpansionVS-D1-EXP-A-2201 | ANU002271 | |
|---|---|---|
| Max total suction flow | Up to 266 l/min | Up to 520 l/min (stack total) |
| Venturi generators | 1 | 2 |
| Vacuum zones | 1 | 1 |
| Vacuum access ports | 2 × G1/4 (BSPP) | – |
| Peak air consumption | 153 l/min | 306 l/min |
| Optimal feed pressure | 80–90 PSI (5.5–6.2 bar) | Fed by the Primary |
| Pneumatic connection | 12 mm O.D. | – |
| Vacuum sensor port | M8 3-pole, A-coded receptacle, male | – |
| Electrical connection | M12 4-pole, A-coded receptacle, male | – |
| Operating voltage / peak current | 24 VDC / 150 mA | – |
| Vacuum / blow-off valves | N.C. / – | Controlled by the Primary |
| Weight | 0.34 kg | 0.27 kg |
| Dimensions (L × W × H) | 154 × 120 × 37 mm | 154 × 98 × 37 mm |
| Peak noise level | ~83 dB | ~83 dB |
| Robot interface | PRF-D (recommended) | |
| Product integration | ASG-D, SPI-D, MTC-D, custom tooling | |
| Materials | PA, SS, Al, Ni, NBR, ED, POM | PA, SS, Ni, ED, POM |
Full datasheets with dimensional drawings and configuration options are available on request.
Onboard I/O, Configured Your Way
The Primary module carries the entire control interface onboard, so sensing, release, and integration are configured at the module instead of wired in from outside the tool.
M8 Sensor Port
3-pole, A-coded receptacle for the vacuum sensor, confirming part presence and grip quality on every cycle.
M12 Electrical Connection
4-pole, A-coded receptacle carrying valve signaling and control on 24 VDC, with a 150 mA peak draw.
Blow Off
A normally closed blow-off valve releases the part fast and clean for accurate placement at speed.
Air In
A single 12 mm O.D. compressed air inlet feeds the entire ejector stack, keeping hose runs short and simple.
Vacuum Access Ports
Two G1/4 BSPP ports connect the gripping circuit, sized for the flow the stack actually delivers.
Cleaning Port
A dedicated cleaning port lets you purge and maintain the vacuum circuit without tearing the tool down.
Available Expansion Parts
Because the platform is modular, these parts install onto the VAC STAC as the application evolves, with no redesign and no replacement of the base unit.
Spring Plunger
Available as a modular add on that installs directly onto the VAC STAC stack. Ask our team about the right fit for your configuration.
Sub Ejector
Adds vacuum flow to the stack when the gripping area grows, scaling capacity instead of replacing hardware.
Vacuum Nozzle
Swappable nozzles tune flow and vacuum level to the workpiece, from porous cartons to sealed surfaces.
VAC STAC Pairs With
Custom Tools
Purpose-built EOAT designed around your part.
Compact Vacuum Ejector Questions
What is a compact vacuum ejector?
A compact vacuum ejector is a small venturi based vacuum generator that mounts directly at the tool, converting compressed air into gripping vacuum with no moving parts and no maintenance schedule.
Why is the VAC STAC stackable?
So the vacuum supply can grow with the application. The Primary module delivers up to 266 l/min on its own; adding the Expansion module raises the total stack flow to 520 l/min without changing the footprint, the electronics, or the control setup.
What is the difference between the Primary and the Expansion module?
The Primary connects to the robot and carries the full control interface: valves, vacuum sensor port, and the M12 electrical connection, with one venturi generator. The Expansion mounts under the Primary and adds two more venturi generators for pure additional flow, with no electronics of its own.
Where does the VAC STAC mount?
Directly at the tool, on the recommended PRF-D robot interface, which keeps hose lengths short and evacuation times fast.
What connects to the M8 sensor port?
The vacuum sensor, a 3-pole A-coded connection that confirms part presence and grip quality during every cycle.
Which grippers does the VAC STAC work with?
It is built for our EOAT ecosystem and integrates with the ASG-D, SPI-D, and MTC-D product lines as well as custom tooling.
What is the VAC STAC made of?
SLS 3D printed PA12 nylon keeps the mass out of the tool, combined with stainless steel, aluminium, nickel, NBR, ED, and POM components where the job demands them.
