- InterProcess Sp. z o.o.
Dust-Free Sack Tip Stations STB
Sack tip stations STB (also referred to as bag dump stations or manual bag emptying stations) provide a dust-free, ergonomic process for manually emptying sacks of bulk material. The unit is designed to handle sacks with a capacity of up to 50 litres – the operator slits the sack on an ergonomic worktop, while the integrated dust extraction system immediately captures any airborne dust.
We offer two station models: STB-V1 (standard, full-size) and STB-V2 (compact, for smaller sacks). Both models are available in AISI 304 stainless steel or AISI 316L acid-resistant steel (glass-bead blasted or electropolished finish). The STB stations integrate easily with feeders, vacuum conveying systems, bulk bag dischargers and process control systems. The STB-V1 is also available in a hermetic version with a glove box – for handling toxic materials, highly potent active pharmaceutical ingredients (HPAPIs) and pharmaceutical applications requiring full operator containment. The STB-V2, in turn, can optionally be fitted with a vibrating sieve that controls the particle size of the material immediately after it has been tipped from the sack.
STB Model Comparison
| Parameter | STB-V1 | STB-V2 |
|---|---|---|
| Extraction fan | 1.1 kW (3×400 VAC) | 0.75 kW (3×400 VAC) |
| Filter area | 8–12 m² | 8 m² |
| Filter cleaning | Automatic, 6 bar compressed air | Automatic, 6 bar compressed air |
| Housing material | AISI 304 / 316L | AISI 304 / 316L |
| Hermetic version (glove box) | Available – containment for pharma and HPAPI | — |
| Vibrating sieve | — | Optional – particle-size control after tipping |
| ATEX design | Optional (Zone 21/22) | Optional (Zone 21/22) |
| Typical application | Sacks up to 50 l, higher throughputs, pharma containment | Smaller sacks, compact footprint, pilot lines |
STB-V1 – Sack Tip Station
The standard sack tip station STB-V1 is a full-size unit with a built-in SEW 1.1 kW extraction fan and cartridge filters with a surface area of 8–12 m². The access flap, fitted with gas springs and a position sensor, automatically activates the extraction fan and initiates sequential filter cleaning once closed.
Hermetic version with glove box: The STB-V1 is available in a special hermetic (containment) design with an integrated glove box – an enclosed chamber with protective gloves that allows the operator to empty sacks without direct contact with the material. This solution is intended for handling toxic substances, highly potent APIs (HPAPIs) and materials requiring full operator and environmental protection. The glove-box version is equipped with HEPA filtration and a spent-sack disposal port with a continuous-liner system.
STB-V2 – Compact Sack Tip Station
The compact sack tip station STB-V2 is designed for smaller sacks and lines with limited space. It features a 0.75 kW extraction fan with cartridge filters providing a surface area of 8 m² and the same automatic cleaning system as the STB-V1.
Option: vibrating sieve. The STB-V2 can optionally be fitted with an integrated vibrating sieve mounted directly below the station outlet. The sieve controls the particle size of the material after tipping – separating agglomerates, lumps and foreign bodies, passing only material of the desired fraction through to the process. This solution is particularly useful in the food and pharmaceutical industries, where particle-size control is required at the raw-material intake stage.
How to Use the Station
1️⃣ Open the Flap
The operator opens the access flap — the position sensor automatically starts the extraction fan.
2️⃣ Tip the Material
The sack is placed on the worktop, slit open and emptied. Airborne dust is immediately drawn by the fan into the filters.
3️⃣ Automatic Cleaning
Once the flap is closed, the filters are automatically cleaned by compressed-air jet nozzles — only when the fan is switched off.
Process Integration and Equipment Options
Thanks to their modular design, STB stations can be fitted with a range of ancillary devices and adapted to the specifics of the process. The lower section of the station is configured to interface with various downstream process equipment:
Station Options
Built-in fan or external dust extraction system, empty-sack compactor, rare-earth magnet, aeration pads or vibrator, ATEX design Zone 21/22.
Downstream Equipment Interface
Screw feeder, rotary airlock valve, bottom suction unit, butterfly valve or knife gate valve, suction lance, vibrating screen, lump breaker LBS.
Frequently Asked Questions (FAQ)
The STB station has an integrated extraction fan that starts automatically when the access flap is opened. The airflow generated by the fan draws the dust released during material tipping into the station interior, where it is captured by cartridge filter elements. Once the flap is closed, the filters are automatically cleaned by compressed-air jet nozzles – cleaning takes place only when the fan is off, so as not to create additional dust during tipping. In addition, the feed grate prevents foreign objects from entering the process.
The STB-V1 is a full-size station with a more powerful fan (1.1 kW) and a larger filter area (8–12 m²) – ideal for intensive operation with sacks up to 50 l, and also available in a hermetic glove-box version for toxic materials. The STB-V2 is a compact version with a 0.75 kW fan – well suited to smaller sacks, limited space and pilot lines. The STB-V2 can optionally be fitted with an integrated vibrating sieve. Our engineers will help select the right model after analysing your process.
Yes – we also build bespoke sack tipping stations. In addition to the standard STB-V1 and STB-V2 models, we design stations with non-standard dimensions, work-surface configurations, dust-extraction arrangements and process interfaces. We tailor the construction to specific industry requirements: sack dimensions, available floor space, ATEX, FDA and GMP compliance, as well as integration with particular downstream equipment (feeders, vacuum conveying, sieves). Contact us – we will analyse your application and propose the optimal solution.
Yes – the STB-V1 model is available in a contained glove-box version. The operator empties sacks through an enclosed chamber with protective gloves, without direct contact with the material. The station is equipped with HEPA filtration to protect the surrounding environment and a spent-sack disposal port with a continuous-liner system that prevents substance spread. This solution meets pharmaceutical industry requirements for handling HPAPI, toxic and highly sensitising substances.
Yes – the lower section of the STB station is designed to interface with a wide range of process equipment. For connection to a vacuum conveying system, we use a bottom suction unit or a suction lance. The station can also be fitted with a rotary airlock valve (for pressure-phase systems), a screw feeder, a butterfly valve, a knife gate valve or a vibrating screen. We select the process interface individually for each project.
Need a Sack Tip Station?
Contact us — we will design a station tailored to your material, process requirements and available space. We also offer hermetic containment versions, bespoke stations and full integration with your conveying system.
Why Choose Our Solutions?
Dust-free operation – integrated dust extraction with automatic filter cleaning
Modular design – sack compactor, magnet, feeder, sieve, glove box
Bespoke stations – non-standard dimensions, configurations and interfaces
Multi-industry experience – food, chemical, pharmaceutical and cosmetics sectors
Safety and hygiene – ATEX, FDA, GMP, HACCP and containment designs
Technical support and service – rapid response, spare parts, 24/7 availability