RATEC injector nozzles use a high-velocity air jet to draw in bulk material and transfer it into a pneumatic conveying line. Because they operate without moving parts, they are simple in design, compact and low-maintenance—ideal for conveying over medium distances. Every injector nozzle is custom-made: we design it for your bulk material, your conveying route and your air supply, and manufacture it in our own plant in St. Veit an der Glan.
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How injector nozzles work
An injector nozzle operates on the jet pump principle. Motive air flows through a nozzle at high velocity. This creates a vacuum that draws the bulk material in from a hopper or feed. In the downstream mixing zone, the material is entrained by the air jet, accelerated and pushed into the conveying line.
Injector nozzles and Laval nozzles
How efficiently an injector operates depends largely on the shape of the motive nozzle. For applications with high air velocities, Laval nozzles are used to accelerate the airflow in a targeted way and improve flow dynamics. We determine which nozzle shape suits your conveying task during the design phase.
Your benefits
- No moving parts: simple design, low wear, minimal maintenance.
- Compact: easy to integrate into existing systems.
- Continuous conveying: consistent transfer of bulk material into the line.
- For medium distances: efficient pneumatic transport without major system complexity.
Technical specifications
| Feature | Injector nozzles |
|---|---|
| Principle | Jet pump, motive air draws in bulk material |
| Conveying type | pneumatic conveying over medium distances |
| Conveyed material | Powders, granulates and other bulk materials |
| Nozzle shape | depending on the application, e.g. as a Laval nozzle |
| Dimensions, materials | customized for each plant |
| Special versions | on request |
We redesign nozzle geometry, connections, materials and wear protection for every project. The versions shown are examples; other designs are possible at any time.
What matters during design
- Bulk material: particle size, bulk density, flow behavior, abrasiveness.
- Conveying task: throughput, conveying length, height difference, pipe routing.
- Air supply: available pressure and available air volume.
- Environment: installation situation, temperature, hazardous area (Ex zone).
Customized by RATEC
RATEC is at home in the bulk materials sector and manufactures in its own plant in Carinthia, certified to ISO 9001, EN 1090-1 and ISO 3834-2, from one-off units to small series. We bring experience from chemicals, food, building materials and energy supply. As a custom component, no two injector nozzles are the same. The photos on this page show example versions from customer projects; your solution is developed from scratch to your requirements. You can find an overview of all custom components under Custom components.
Are you planning pneumatic conveying with an injector?
Tell us your bulk material, throughput and conveying route. We will get back to you with a concrete proposal.