STB sack tip stations

Dust-free sack emptying for bulk materials

STB sack tip stations provide dust-free, ergonomic manual emptying of sacks holding up to 50 litres. The operator slits the sack open on the working surface and the integral extraction system immediately captures the airborne dust.

Ask about a station Compare the models

up to 50 l sack capacity 8–12 m² filter area AISI 304 / 316L stainless or acid-resistant steel ATEX · FDA · GMP compliant builds

How it is used

A dust-free process in three steps

The whole cycle — from opening the lid to cleaning the filters — runs automatically. The operator deals only with the sack, while the station looks after extraction and filter regeneration on its own.

Opening the lid

The operator opens the access lid, assisted by gas struts. A position sensor starts the extraction fan automatically, so the workstation is under extraction from the first second.

Tipping the material

The sack is placed on the working surface, slit open and emptied through the intake grate, which holds back foreign bodies. Airborne dust is drawn straight into the cartridge filters.

Automatic cleaning

Once the lid is closed, the filters are cleaned in sequence by compressed air jets at 6 bar — only with the fan switched off, so that no further dust is raised.

STB models

STB-V1 and STB-V2 sack tip stations

Both models are built in AISI 304 stainless steel or acid-resistant AISI 316L, with automatic filter cleaning as standard. The stations integrate readily with feeders, pneumatic conveying, big bag stations and control systems.

Full-size

STB-V1

A station for intensive work with sacks up to 50 l. The lid with its position sensor automatically starts the fan and the sequential filter cleaning. Available in a contained version with a glovebox.

Fan1.1 kW (3×400 VAC)
Cartridge filters8–12 m², automatic cleaning
Special versioncontained, with a glovebox
Applicationhigher throughputs, contained pharmaceutical processes

STB-V1 datasheet (PDF)

Compact

STB-V2

A station for smaller sacks and lines with restricted space, with the same automatic filter cleaning system as the STB-V1. Optionally with a vibrating screener beneath the outlet.

Fan0.75 kW (3×400 VAC)
Cartridge filters8 m², automatic cleaning
Optionintegral vibrating screener
Applicationsmaller sacks, compact installations, pilot lines

STB-V2 datasheet (PDF)

Parameter	STB-V1 full-size	STB-V2 compact
Extraction fan	1.1 kW (3×400 VAC)	0.75 kW (3×400 VAC)
Filter area	8–12 m²	8 m²
Filter cleaning	automatic, compressed air at 6 bar	automatic, compressed air at 6 bar
Enclosure material	AISI 304 / 316L	AISI 304 / 316L
Contained version (glovebox)	available — for HPAPIs and toxic materials	—
Vibrating screener	—	optional — particle size control after tipping
ATEX build	optional (zone 21/22)	optional (zone 21/22)
Typical application	sacks up to 50 l, higher throughputs, contained processes	smaller sacks, compact installations, pilot lines

See it in action

An STB station during manual sack emptying

This short film shows the full working cycle: opening the lid with the fan starting automatically, tipping the material through the intake grate, and closing the workstation dust-free.

Arrange a demonstration

Special versions

Process containment and particle size control

STB-V1

Contained version with a glovebox

A sealed chamber with protective gloves allows sacks to be emptied without any direct contact between operator and material — for toxic substances, highly potent active pharmaceutical ingredients (HPAPIs) and strong allergens.

•HEPA filtration protecting the surrounding environment
•continuous-liner port for removing empty sacks
•full containment protecting operator and surroundings

STB-V2

Integral vibrating screener

A screener mounted directly beneath the station outlet controls the particle size of the material after tipping, so only the required fraction passes into the process.

•separates out agglomerates, lumps and foreign bodies
•particle size control at the raw material intake stage
•particularly useful in the food and pharmaceutical industries

We also design bespoke stations: non-standard dimensions, working surface layout, extraction system and process interface.

Downloads

STB-V1 datasheet (PDF) STB-V2 datasheet (PDF)

Process integration

Modular construction. A station matched to your process

The lower part of the station is adapted to work with a range of process equipment, and the additional fittings are selected to suit the material and the hygiene requirements.

Station options

•built-in fan or an external extraction system
•empty sack compactor
•rare-earth magnet above the intake grate
•vibrating discharge aids or a vibrator to assist tipping
•ATEX build, zone 21/22

Equipment it works with

•screw feeder or rotary valve
•bottom suction unit or suction lance — vacuum pneumatic conveying
•butterfly valve or knife gate valve
•vibrating screen, LBS lump breaker
•big bag stations and control systems

Not sure which configuration to choose? Tell us about the material and the process, and our engineers will select the model and the fittings for you.

Discuss your application

Case studies

STB stations at our customers’ plants

Click to enlarge

STB-V1 station handling dust from freeze-dried vegetables

STB-V1 station feeding DSL75G gravimetric feeders by vacuum conveying

Three STB-V2 stations handling ingredients for potato pancake production

FAQ

Frequently asked questions

How is dust-free operation ensured when emptying sacks?

The STB station has an integral extraction fan that starts automatically when the access lid is opened. The airflow draws the dust raised during tipping into the station, where it is filtered by the cartridge elements. Once the lid is closed, the filters are cleaned automatically by compressed air jets — only with the fan switched off, so that no further dust is raised. The intake grate also prevents foreign bodies from entering the process.

Which model should I choose — STB-V1 or STB-V2?

The STB-V1 is the full-size station, with a more powerful fan (1.1 kW) and a larger filter area (8–12 m²) — well suited to intensive work with sacks up to 50 l, and also available in a contained version with a glovebox for toxic materials. The STB-V2 is the compact version with a 0.75 kW fan — a good fit for smaller sacks, restricted space and pilot lines, and it can optionally be fitted with an integral vibrating screener. Our engineers will help you choose the model once they have looked at your process.

Can a station be built for a specific application?

Yes — we also build bespoke sack tip stations. Alongside the standard STB-V1 and STB-V2 models we design stations with non-standard dimensions, working surface layouts, extraction systems and process interfaces. The design is adapted to the size of the sacks, the space available, ATEX, FDA and GMP requirements, and integration with particular process equipment (feeders, pneumatic conveying, screeners). Get in touch and we will look at your application and propose the best solution.

Can the station handle toxic or highly potent (HPAPI) materials?

Yes — the STB-V1 is available in a contained version with a glovebox. The operator empties the sacks through a sealed chamber fitted with protective gloves, with no direct contact with the material. The station has HEPA filtration protecting the surrounding environment and a continuous-liner port for removing empty sacks. The solution meets pharmaceutical industry requirements for handling HPAPIs, toxic substances and strong allergens.

Can the station be connected to pneumatic conveying?

Yes — the lower part of the STB station is designed to work with a wide range of process equipment. For a connection to vacuum pneumatic conveying we use a bottom suction unit or a suction lance. The station can also be fitted with a rotary valve (for the pressure phase), a screw feeder, a butterfly valve, a knife gate valve or a vibrating screen. The process interface is specified individually for each project.

Need a sack tip station?

We will design a station to suit your material, your process requirements and the space available — from a standard build to a fully contained one, with complete integration into the conveying system.

Get in touch

Dust-free handling — integral extraction with automatic filter cleaning

Modular construction — compactor, magnet, feeder, screener, glovebox

Bespoke stations — non-standard dimensions, configurations and interfaces

Experience across many industries — food, chemical, pharmaceutical and cosmetics

Safety and hygiene — ATEX, FDA, GMP, HACCP and process containment

Technical support and service — fast response, spare parts, 24/7 cover