VAC-7HS abrasive recovery system with storage silo and CS-500 pre-separator, complete set
The Contracor abrasive recovery system VAC-7HS is a powerful vacuum recovery unit with a freestanding 0.3 m³ storage silo and an additional CS-500 pre-separator. The system was specially developed for more heavily dust-generating mineral abrasives and enables both controlled reuse and discharge of the recovered material into a big bag. With 7.5 kW drive power, a recovery capacity of up to 3.5 tonnes per hour, a cartridge filter with pulse-jet cleaning, and a manually operated silo shut-off flap, this complete set is suitable for professional stationary blast rooms.
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| Item no.
10300510
VAC-7HS abrasive recovery system with storage silo and CS-500 pre-separator, complete set is in stock and will be shipped as soon as it is available again
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| Item no.
10300510
VAC-7HS abrasive recovery system with storage silo and CS-500 pre-separator, complete set is in stock and will be shipped as soon as it is available again
Contracor VAC-7HS – abrasive media recovery with storage silo and CS-500 pre-separator
The Contracor abrasive media recovery system VAC-7HS with storage silo and CS-500 pre-separator is a powerful electrically operated vacuum recovery system for collecting, cleaning and temporarily storing used abrasive media. The system was specially developed for mineral abrasive media that can generate increased dust levels and a high proportion of unusable fine particles during the blasting process.
The VAC-7HS combines a particularly powerful side-channel blower with a freestanding CS-500 pre-separator, an integrated cartridge filter and a separately installed storage silo with a volume of 0.3 m³. This separates the collected abrasive media from unusable material, filters it and then stores it in the storage silo independently of the blast pot.
The recovered material can be discharged from the silo in a controlled manner via the manually operated shut-off flap. Suitable abrasive media can be refilled into a blast pot. Alternatively, material that can no longer be used can be transferred to a Big-Bag filling station for orderly disposal.
With a drive power of 7.5 kW, a recovery capacity of up to 3.5 tonnes per hour and a maximum suction hose length of 10 metres, the VAC-7HS is suitable for professional stationary blast rooms with increased requirements for dust separation, material storage and flexible further processing.
Your benefits at a glance
- ✅ Specially developed for mineral abrasive media that generate higher levels of dust
- ✅ Freestanding CS-500 pre-separator
- ✅ Freestanding storage silo with a volume of 0.3 m³
- ✅ High-performance side-channel blower with 7.5 kW
- ✅ Recovery capacity of up to 3.5 tonnes per hour
- ✅ Separation of reusable and unusable abrasive media
- ✅ Central interim storage of recovered material
- ✅ Manually controlled material discharge via shut-off flap
- ✅ Blast pot refilling possible
- ✅ Can be used as an alternative to filling a Big-Bag station
- ✅ Integrated high-performance cartridge filter
- ✅ Automatic pulse-jet cleaning of the filter element
- ✅ Reduced load on the main filter through pre-separation
- ✅ Lower consumption of new abrasive media
- ✅ Reduced cleaning and disposal effort
- ✅ Flexible installation independent of the blast pot
📦 Scope of delivery
- Contracor VAC-7HS vacuum abrasive media recovery system
- Electric side-channel blower with 7.5 kW
- Freestanding CS-500 pre-separator
- Manual emptying of the pre-separator
- Freestanding abrasive media storage silo with a volume of 0.3 m³
- Manually operated shut-off flap on the storage silo
- Integrated high-performance cartridge filter
- Automatic pulse-jet filter cleaning
- Floor hopper with grating
- 5 m abrasion-resistant rubber suction hose
- Suction hose inner diameter 63.5 mm (2½")
A blast pot and a suitable Big-Bag holder are not included in the scope of delivery. Material is discharged from the storage silo manually via the integrated shut-off valve.
Technical data
| Feature | Value |
|---|---|
| Model | VAC-7HS |
| System type | Stationary vacuum abrasive recovery system |
| Configuration | With storage silo and CS-500 pre-separator |
| Recommended abrasives | Reusable mineral abrasives |
| Silo volume | 0.3 m³ |
| Material discharge | Manually via shut-off flap |
| Applications | Refilling a blast pot or filling Big Bags |
| Drive | Electric side-channel blower |
| Rated voltage | 3~ 380–420 V / 50 Hz |
| drive power | 7.5 kW |
| recovery capacity | up to 3.5 t/h |
| Maximum suction hose length | 10 m |
| Included suction hose length | 5 m |
| Suction hose inner diameter | 63.5 mm (2½") |
| Suction hose material | Abrasion-resistant rubber |
| Maximum abrasive grain size | Up to G40, approx. 0.30–0.80 mm |
| Dust pre-separator | CS-500, freestanding |
| Pre-separator dust discharge | Manual |
| Filter type | Cartridge filter |
| Filter area | 7.5 m² |
| Filter medium | Polyester |
| Filter cleaning | Automatic pulse-jet cleaning |
| Sound pressure level | 72 dB(A) |
| Weight | 565 kg |
Dimensions (mm)
Specially designed for mineral abrasives
Mineral abrasives can generate high levels of dust, abrasion, and broken grains during the blasting process. These fine particles should be separated as reliably as possible from the still-usable abrasive before the material is reused or stored.
The VAC-7HS was specially developed for these applications. The upstream CS-500 performs an initial separation of reusable abrasive from unusable components before the material flow reaches the recovery unit and the storage silo.
This makes the system particularly suitable for blasting halls where mineral media are used and increased dust contamination within the material circuit is to be expected.
The VAC-7HS also features the freestanding CS-500 pre-separator. This makes the system particularly suitable for mineral abrasives and abrasives that generate higher dust levels.
Multi-stage recovery process
The used abrasive is first swept or shoveled into the floor hopper. From there, the powerful side-channel blower draws the material through the abrasion-resistant rubber suction hose.
The material flow first reaches the freestanding CS-500 pre-separator. There, reusable abrasive is separated from dust, fines, and unusable material.
The recovered abrasive is then transported to the main unit and into the freestanding 0.3 m³ storage silo. Fine dust particles remaining in the airflow are separated in the integrated cartridge filter.
The material remains in the storage silo until it is fed via the manually operated shut-off valve to a blast pot, another material container, or a Big-Bag station.
Freestanding CS-500 pre-separator
The CS-500 is located in the material flow upstream of the actual recovery and filtration unit. It performs initial separation of dust, broken abrasive grains and other lighter components.
This reduces the dust load on downstream components. At the same time, a smaller proportion of unusable fine particles enters the storage silo.
The material separated in the CS-500 is collected in a separate area and emptied manually. The required emptying intervals depend on the type of abrasive media, the amount of dust generated and the daily operating time.
- ✅ Pre-separation of coarse dust and fine particles
- ✅ Separation of usable and unusable material
- ✅ Reduced load on the integrated cartridge filter
- ✅ Improved quality of the stored abrasive media
- ✅ Separate collection area with manual emptying
Freestanding storage silo with a volume of 0.3 m³
The VAC-7HS features a separately installed abrasive-media storage silo with a volume of 0.3 m³. This means that the recovered material is not automatically fed to a single blast pot but is first collected centrally.
The operator can temporarily store and inspect the material in the silo and then decide whether it should be reused or disposed of. The freestanding design allows flexible integration into existing blast rooms and is not directly tied to a specific blast pot.
The actual quantity of material that can be stored in the silo depends on the bulk density of the abrasive media used.
The storage silo allows the recovered material to be processed separately from the blasting process in terms of both time and location.
Reuse or big-bag filling
The VAC-7HS can be used universally for reusing suitable abrasive media or for orderly disposal of media that can no longer be used.
For reuse, a suitable blast pot or material container is positioned below the discharge point. After opening the manual shut-off valve, the abrasive media flows out of the storage silo by gravity.
If the material is to be disposed of, a suitable big-bag filling station can be installed below the discharge point. This allows the recovered abrasive media to be collected in a controlled manner and prepared for removal.
- ✅ Controlled discharge into a blast pot
- ✅ Flexible use with different material containers
- ✅ Big-bag filling for disposal possible
- ✅ Material can be processed independently of time
- ✅ Central collection of recovered abrasive media
Manual material discharge via shut-off valve
The material stored in the 0.3 m³ silo is discharged via a manually operated shut-off valve. This allows the operator to determine when and how much material is discharged.
The manual design enables simple and controlled operation. At the same time, the closed flap prevents the silo from being emptied unintentionally.
Before opening, ensure that the designated blast pot, material container, or Big Bag is correctly positioned and secured against slipping.
The VAC-7HS does not automatically refill a blast pot. Material is discharged manually via the shut-off flap of the storage silo.
High-performance side-channel blower
The VAC-7HS is equipped with an electric side-channel blower with a rated drive power of 7.5 kW. It generates the negative pressure required for pneumatic material conveying.
The used abrasive is transported through the suction line to the CS-500 and then to the recovery unit or storage silo.
The actual conveying capacity depends on the type of abrasive, grain shape, bulk density, moisture, degree of contamination, hose length, and hose routing.
Integrated cartridge filter with pulse-jet cleaning
The VAC-7HS features an integrated high-performance cartridge filter with a filter area of 7.5 m². The polyester filter medium retains fine dust particles from the conveyed airstream.
Automatic pulse-jet cleaning cleans the filter cartridge with short compressed-air pulses. This loosens adhering dust from the filter surface, helping to keep airflow and suction performance as constant as possible.
The upstream CS-500 reduces the amount of dust reaching the cartridge filter. This relieves the filter element and can improve its service life compared with a system without pre-separation.
Despite automatic cleaning, the cartridge filter must be inspected regularly and replaced as needed, depending on dust exposure and operating time.
Up to 3.5 tonnes of recovery capacity per hour
The VAC-7HS achieves a recovery capacity of up to 3.5 tonnes per hour. This makes the system suitable for professional stationary blast rooms with a regular volume of mineral abrasives.
The maximum intended suction hose length is 10 meters. The complete set is supplied with a 5-meter abrasion-resistant rubber suction hose with an inner diameter of 63.5 mm.
The specified performance may vary with other abrasives due to differences in specific gravity, grain shape, moisture, and flow characteristics. Hose bends, reductions in cross-section, and differences in elevation also affect conveying capacity.
The suction line should be installed as short and straight as possible, without unnecessary bends. Increased flow resistance can reduce recovery performance.
Economical blasting media processing
Even with mineral blasting media, a technically usable material fraction may remain after the blasting process. Without recovery, this fraction is often disposed of together with dust and unusable material.
The VAC-7HS separates the reusable material fraction in the CS-500 and collects it in the freestanding storage silo. The operator can then decide whether to reuse the material or send it for disposal.
This reduces the need for new blasting media, manual cleaning effort, internal material transport, and disposal volume.
- ✅ Reduced need for new blasting media
- ✅ Reuse of suitable mineral blasting media fractions
- ✅ Reduced disposal volume
- ✅ Centralized and controlled material storage
- ✅ Less manual material handling
- ✅ Reduced cleaning effort in the blasting area
- ✅ Flexible choice between reuse and disposal
- ✅ Relieves the main filter through the CS-500
Floor hopper with grating
The floor hopper included in the complete set serves as the central collection point for used blasting media. Material lying on the workshop floor is swept or shoveled into the hopper and then extracted by the vacuum unit.
The integrated grating retains larger foreign objects before they can enter the suction line. This protects the suction hose, dust pre-separator, filter unit, and storage silo from coarse contaminants.
The floor hopper enables the retrofitting of a stationary recovery system without requiring the installation of a complete automatic floor conveying system.
Suitable blasting media
The VAC-7HS was specially developed for reusable mineral blasting media. Whether a particular material is suitable for multiple blasting cycles depends on grain stability, contamination, and its condition after the blasting process.
As a technical size reference, the manufacturer specifies a maximum grain size of G40 or approximately 0.30 to 0.80 mm. Actual suitability also depends on grain shape, bulk density, moisture, and flow behavior.
The material used should be dry and sufficiently free-flowing. Damp, clumped, or heavily contaminated blasting media can reduce suction performance and block material paths.
Not every mineral blasting medium is suitable for repeated reuse. Highly friable disposable blasting media can only be recovered economically to a limited extent, even with pre-separation.
Optional handheld suction tube
For flexible collection of blasting media from larger floor areas, an optional handheld suction tube with support wheels and a handle is available. The accessory is supplied with a 10-meter PU suction hose.
The hand suction tube enables targeted collection of loose material in areas that cannot be reached directly via the stationary bottom hopper.
The support wheels make it easier to guide the suction tube and reduce physical effort. The hand suction tube is not included as standard with the VAC-7HS complete set.
🔧 Areas of application
- Stationary sandblasting halls
- Blast rooms using mineral abrasives
- Applications with increased dust generation
- Central abrasive collection
- Intermediate storage of recovered abrasive
- Filling various blast pots
- Big Bag filling stations
- Steel and metal construction
- Tank and system construction
- Mechanical engineering
- Vehicle and commercial vehicle manufacturing
- Rail vehicle manufacturing
- Shipyards and marine maintenance
- Surface preparation before coating and painting
- Removal of rust, mill scale and old coatings
- Retrofitting existing stationary blasting systems
Operating requirements
Operation of the VAC-7HS requires a suitable three-phase power connection with 3~ 380–420 V / 50 Hz. A suitable compressed-air supply is also required for the automatic pulse-jet cleaning of the filter cartridge.
The system must be installed on a level surface with sufficient load-bearing capacity. The system weight of approximately 565 kg, as well as the additional weight of the abrasive stored in the silo, must be taken into account during planning.
Suitable routing for lines must be provided between the bottom hopper, CS-500, recovery unit and storage silo. The components must remain easily accessible for operation, maintenance and cleaning.
There must be sufficient space below the silo outlet for a blast pot, material container or suitable Big Bag holder.
Maintenance and care
Regular maintenance is essential for consistently high suction, separation and recovery performance. The CS-500, filter cartridge, pulse-jet cleaning system, suction hoses and storage silo in particular must be checked regularly.
The dust pre-separator must be emptied manually depending on the amount of material accumulated. Emptying it too late can impair separation performance and place greater strain on downstream components.
The storage silo and shut-off valve must also be checked for deposits, wear and proper operation. The valve must close reliably and be safe to operate.
- Empty the CS-500 dust pre-separator regularly
- Check the separation area for deposits
- Check the filter cartridge regularly
- Check the operation of the pulse-jet cleaning system
- Inspect suction hoses for abrasion and leaks
- Clean the bottom hopper and grating
- Check the storage silo for deposits
- Check the shut-off valve for proper operation and leaks
- Keep material pathways free of foreign objects
- Have electrical components serviced by qualified personnel
VAC-7H or VAC-7HS?
| Feature | VAC-7H | VAC-7HS |
|---|---|---|
| drive power | 7.5 kW | 7.5 kW |
| storage silo | 0.3 m³ | 0.3 m³ |
| Dust pre-separator | No | CS-500 |
| recovery capacity | up to 4.0 t/h | up to 3.5 t/h |
| Material discharge | Manual | Manual |
| Recommended use | Universal abrasive recovery | Mineral and more dust-intensive abrasives |
| Weight | 525 kg | 565 kg |
The VAC-7H is the right solution for universal recovery and intermediate storage of suitable abrasives. The VAC-7HS additionally features the CS-500 dust pre-separator and is therefore particularly recommended for mineral media with increased dust generation.
VAC-7S or VAC-7HS?
| Feature | VAC-7S | VAC-7HS |
|---|---|---|
| Dust pre-separator | CS-500 | CS-500 |
| Material container | Storage container mounted directly on the blast pot | Freestanding 0.3 m³ storage silo |
| Cascade cleaner | Yes | No |
| Refilling | Automatic | Manually via shut-off flap |
| Big-bag filling | Not intended | Possible |
| Recommended use | Automatic abrasive circuit at the Z-200 | Flexible storage, reuse, or disposal |
The VAC-7S is suitable for an automatic recovery circuit with direct refilling of a Contracor Z-200 blast pot. The VAC-7HS, by contrast, offers a freestanding storage silo and enables flexible, manually controlled reuse or disposal of the material.
Why choose the Contracor VAC-7HS?
The Contracor VAC-7HS is a flexible complete solution for stationary blast rooms where mineral abrasives with increased dust generation are to be recovered, pre-cleaned, and stored independently of the blast pot.
The powerful 7.5 kW side-channel blower handles pneumatic material conveying. The freestanding CS-500 separates dust and unusable fine particles, while the integrated cartridge filter performs fine separation of the airflow.
The cleaned material is collected in the 0.3 m³ storage silo and can then be dispensed in a controlled manner for reuse or disposal.
This enables the VAC-7HS to combine powerful abrasive recovery with improved dust separation, flexible intermediate storage, and versatile options for further material processing.
FAQ – Frequently Asked Questions
What is the function of the VAC-7HS?
The system extracts used abrasive, separates usable material from dust and unusable components, and collects it in a freestanding storage silo.
Which abrasives was the VAC-7HS developed for?
The system was specially developed for reusable mineral abrasives that generate increased amounts of dust.
What is the difference between the VAC-7HS and the VAC-7H?
The VAC-7HS additionally features the freestanding CS-500 dust pre-separator.
What is the difference between the VAC-7HS and the VAC-7S?
The VAC-7S has a storage container mounted directly on the blast pot with automatic refilling. The VAC-7HS features a freestanding storage silo with manual material discharge.
What is the capacity of the storage silo?
The freestanding storage silo has a volume of 0.3 m³.
What is the function of the CS-500?
The CS-500 separates dust, fine particles, and unusable components from the recovered abrasive and thereby reduces the load on the main filter.
How is the CS-500 emptied?
The pre-separator is emptied manually.
Is a blast pot refilled automatically?
No. Material is discharged manually via the shut-off flap of the storage silo.
Can the material be reused?
Yes. Suitable blasting media can be discharged from the storage silo in a controlled manner into a blast pot or material container.
Can the VAC-7HS be used for disposal?
Yes. Material that can no longer be used can be discharged from the storage silo into a suitable Big-Bag station.
Is a Big-Bag station included in the scope of delivery?
No. A suitable Big-Bag frame or filling station must be provided separately.
Is a blast pot included in the scope of delivery?
No. A blast pot is not included in the scope of delivery.
What is the recovery capacity?
According to the manufacturer, the maximum recovery capacity is up to 3.5 tonnes per hour.
What is the maximum permitted suction hose length?
The maximum specified suction hose length is 10 meters.
How much suction hose is included in the complete set?
The complete set includes 5 meters of abrasion-resistant rubber suction hose.
What is the internal diameter of the suction hose?
The internal diameter is 63.5 mm or 2½ inches.
What is the maximum grain size that can be processed?
As a technical reference, the manufacturer specifies a maximum grain size up to G40, equivalent to approximately 0.30–0.80 mm.
Can every mineral blasting medium be reused?
No. Reusability depends on the material type, grain stability, contamination and condition after the blasting process.
How is the blasting media collected?
The used material is placed in the floor hopper with a broom or shovel and then extracted.
How is the cartridge filter cleaned?
The filter cartridge is cleaned automatically by short compressed-air pulses from the Pulse-Jet cleaning system.
Does the VAC-7HS require compressed air?
Yes. A suitable compressed-air supply is required for automatic Pulse-Jet filter cleaning.
What electrical power supply is required?
A three-phase power connection with 3~ 380–420 V / 50 Hz is required.
What is the drive power?
The electric side-channel blower has a drive power of 7.5 kW.
How loud is the VAC-7HS?
The sound pressure level specified by the manufacturer is 72 dB(A).
How heavy is the system?
The specified system weight is approximately 565 kg. The weight of the stored blasting media must be added.
Is a manual suction tube included in the scope of delivery?
No. A manually operated suction tube with support wheels, handle and 10-meter PU suction hose is available as an optional accessory.
Can the VAC-7HS be retrofitted in an existing blast room?
Yes. The freestanding system concept is particularly suitable for retrofitting existing blast rooms with individual material flow paths.
Why is the VAC-7HS worthwhile?
The system combines the recovery of mineral blasting media with additional pre-separation of dust and flexible intermediate storage. This allows the material to be reused or disposed of in a controlled manner.
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