vacuum loader are designed for clean transfer of powder, granular or liquid materials in a closed state. It sucks materials from the original storage location such as bins and hoppers through the vacuum negative pressure principle, and delivers them to the target container through a sealed conveying pipe. The entire conveying process does not require manual intervention, which not only improves the conveying efficiency, but also greatly reduces the risk of dust leakage and cross contamination. The equipment supports a variety of configurations, such as open feed hoppers or fully enclosed storage systems, which can be flexibly adapted to different production processes.
In practical applications, vacuum feeders are commonly used in automated production lines with high requirements for precision and continuity. They can precisely control the amount of material conveyed each time, achieving quantitative or automatic feeding operations. Vacuum feeders can be used in conjunction with other equipment to improve overall process stability and production efficiency. Furthermore, vacuum feeders also have advantages such as compact structure, stable operation, and cleanliness.
Compared with auger conveyor, vacuum loaders use negative pressure airflow for enclosed conveying instead of mechanical screw pushing.
For powders requiring dust-free transfer, vacuum conveying systems are usually cleaner than shaftless screw conveyor systems.Screw conveyors are usually used for short-distance conveying of powders or granules in open or semi-enclosed production systems.
Compared with screw conveyors, vacuum loaders can transport materials vertically and over longer distances with less dust leakage. They also reduce manual handling and improve workshop cleanliness. However, screw conveyors are often more suitable for heavy materials and high-temperature materials.
A Vacuum Loader uses a closed conveying system, effectively preventing dust leakage and complying with industry standards such as GMP and FDA, making it suitable for sterile or clean environments. Secondly, it boasts a high degree of automation, allowing integration with a central control system for intelligent feeding. It has a small footprint, making it suitable for factory layouts with limited space. Furthermore, it is easy to maintain and clean, with filter components that can be quickly disassembled and replaced. In addition, for materials that are hygroscopic, explosive, or highly toxic, vacuum conveying is safer and more reliable than traditional mechanical conveying methods such as screw conveyors and belt conveyors.
The vacuum feeder is mainly composed of vacuum pump (or vacuum generator), vacuum hopper, filter, back-blowing cleaning system, pneumatic discharge door, material level sensor, stainless steel suction gun, conveying pipeline and other parts. Among them, the filter is one of the key components of the equipment. Common materials include polyester film, PE porous filter rod, 316L stainless steel sintered mesh, titanium metal, etc., which can efficiently separate air and materials, avoid dust leakage and protect the vacuum system. The filter surface can be automatically cleaned by back-blowing with compressed air to ensure continuous and efficient operation. According to application requirements, vacuum feeders can be divided into two working modes: intermittent and continuous. Intermittent is suitable for equipment with periodic feeding, while continuous is suitable for continuous process production lines with
A vacuum feeder is an efficient device that uses vacuum negative pressure to achieve closed conveying of materials. It is mainly composed of an oil-free and water-free vacuum pump, a vacuum hopper, a high-efficiency filtration system (polyester film, PE, 316L stainless steel or titanium alloy filter element can be selected), a backflush cleaning device, a pneumatically controlled discharge valve, an automatic material level sensor, a stainless steel suction port, and a conveying hose. During operation, the vacuum pump generates a stable negative pressure airflow, sucks the material through the suction port and forms a gas-solid mixed flow along the conveying pipe, and finally enters the hopper. The filter device can effectively separate air and materials to ensure that the system is clean and dust-free. When the hopper reaches the set capacity, the system automatically stops suction and opens the discharge valve to accurately deliver the material to the downstream equipment to achieve a fully automatic continuous feeding process.
A vacuum loader works by generating negative pressure through a vacuum pump or pneumatic vacuum generator. During operation, the vacuum system creates airflow inside the conveying pipeline, allowing powder or granular materials to be sucked from the storage hopper or feeding station into the vacuum conveying pipe.
The material and airflow enter the vacuum hopper together, where the filter system separates the conveyed material from the air. The filtered air passes through the vacuum unit, while the material remains inside the hopper. When the hopper reaches the preset feeding capacity, the vacuum system automatically stops suction and opens the discharge valve to unload materials into downstream equipment such as mixers, screening machines, or packaging machines.
| （With vacuum pump or Roots Fan） | （With vacuum generator） | ||||||
|---|---|---|---|---|---|---|---|
| Model |
Capacity (T/h) |
Power (Kw) |
Air Consumption (L/min) |
Model |
Capacity (T/h) |
Air Pressure | Air Consumption (L/min) |
| STZK-X1 | 0.4 | 1.5 | 10 | SMSQ-F1 | 0.4 | 0.6~0.8MPa | 180-200 |
| STZK-X2 | 0.6 | 2.2 | 20 | SMSQ-F2 | 0.6 | 0.6~0.8MPa | 360-400 |
| STZK-X3 | 1.2 | 3 | 50 | SMSQ-F3 | 1.2 | 0.6~0.8MPa | 720-800 |
| STZK-X4 | 2 | 4 | 100 | SMSQ-F4 | 2 | 0.6~0.8MPa | 1450-1800 |
| STZK-X5 | 3 | 4 | 150 | SMSQ-F5 | 4 | 0.6~0.8MPa | 1800-2520 |
| STZK-X6 | 4 | 5.5 | 200 | ||||
| STZK-X7 | 6 | 7.5 | 300 | ||||
Our factory offers both electric and manual types to meet different production needs and environments, adaptable to various materials such as powders, granules, and fragile materials. The flexible design can meet the needs of general working conditions, explosion-proof cleanrooms, and non-standard customization, providing stable conveying solutions for various industries.
Automatic Vacuum Loader: Powered by an electric vacuum pump or pneumatic vacuum generator, it achieves continuous dust-free conveying of powders and granules through a closed pipeline. It features automatic suction, unloading, and back-flushing dust removal control, and can stably connect to mixers, silos, packaging machines, etc. The entire process requires no manual operation, making it the mainstream feeding solution for large-scale production.
Hand-cranked Vacuum Loader: This type of loader relies on manual cranking to generate negative pressure for feeding. It requires no electricity or air supply, featuring a simple structure, lightweight design, easy portability, and low maintenance costs. It is suitable for power-free environments, temporary material replenishment, small-batch trial production, or explosion-proof environments where electricity is prohibited. Operation is intuitive, start and stop are controllable, and it can meet the needs of lightweight, intermittent feeding.
Selecting a suitable vacuum loader mainly depends on material characteristics, conveying distance, and production requirements. For fine powders with poor flowability, a high-efficiency filtration system and stronger vacuum source are usually required. For fragile granules or plastic pellets, lower conveying speed and buffer structures help reduce material damage during transportation.
Users should also consider conveying capacity, vertical lifting height, and horizontal conveying distance when choosing equipment models. Small production lines may only require compact intermittent vacuum feeders, while large automated systems usually require continuous conveying systems with larger hopper capacities and PLC automatic control.
Material properties are also important. Hygroscopic powders, explosive materials, or corrosive chemicals may require 316L stainless steel structures, explosion-proof motors, or sealed dust-free conveying systems. In food and pharmaceutical industries, equipment with polished inner surfaces and quick-cleaning structures is commonly selected.
The vacuum feeder is suitable for many different types of materials, especially for conveying powdered, granular, and small batches of liquid or mixed materials. The following is a classification of common applicable material types
Powdered Materials: One of the most typical applications of vacuum feeders is the closed-loop conveying of powdered materials. Their powerful negative pressure suction can handle various fine and ultrafine powders, such as milk powder, flour, starch, cocoa powder, pharmaceutical powder, calcium carbonate, and zinc oxide. Furthermore, some powders are hygroscopic or electrostatic. Vacuum feeders can also be equipped with anti-static hoses, 316L stainless steel bodies, and automatic backflushing devices to effectively prevent clogging and material adhesion.
Granular Materials: Vacuum feeders excel in conveying materials such as plastic granules, coffee beans, desiccant granules, tablets, grains, and PET granules. The equipment can adjust the suction and filtration structure according to the size, density, and shape of the particles to ensure that the material structure is not damaged during conveying. For some fragile materials, buffer devices or low-speed suction control can also be configured to avoid collisions or breakage during conveying.
For materials with poor flowability or low specific gravity, such as silica, magnesium carbonate, foam particles, EPP/EPS lightweight fillers, or nanoparticles, vacuum feeders can also handle the task, but structural optimization and parameter adjustments are required. These materials, due to their small particle size, low density, and tendency to suspend, are prone to clogging, backflow, or insufficient suction. Therefore, they are typically equipped with high-efficiency backwashing cleaning systems, large-area filters, or anti-clogging devices to ensure long-term stable system operation.
A Vacuum Loader boasts excellent compatibility and interoperability, allowing it to connect with various equipment such as mixers, packaging machines, and vibrating screens. This enables continuous, automated conveying of powder and granular materials, seamlessly integrating upstream and downstream processes and reducing manual handling.
Screening Machine: The vacuum loader can directly and securely convey powder and granular materials to the inlet of a screening machine. The two can be linked to form an automated screening production line, significantly improving screening efficiency and workshop cleanliness, and completing the screening of powders and granules.
Packaging Machine: The vacuum loader provides a stable and uniform supply to the packaging machine, ensuring a continuous and sufficient material level, effectively preventing material shortages and blockages. Its fully enclosed conveying structure meets hygiene requirements, making it particularly suitable for the automatic packaging and feeding of finished and semi-finished products in the food, pharmaceutical, and fine chemical industries.
Mixer: The vacuum loader can directly and securely convey multiple raw materials into the mixer, reducing manual handling and dumping, and minimizing cross-contamination and material loss. With the mixer's start/stop signals, automatic feeding and stopping can be achieved, realizing integrated ingredient preparation, feeding, and mixing.
During long-term operation, vacuum loaders may encounter several common problems related to powder conveying and filtration systems. One common issue is filter blockage caused by ultrafine powder or high-moisture materials. When filters become clogged, suction efficiency decreases and conveying capacity becomes unstable. This problem can usually be solved by increasing filter cleaning frequency, using larger filter areas, or selecting anti-static filter materials.
Another common issue is insufficient conveying capacity. This may occur when the conveying distance is too long, pipeline diameter is too small, or the vacuum pressure is insufficient. Optimizing pipeline layout, reducing bending sections, and selecting a larger vacuum pump can improve conveying performance.
Some lightweight powders or materials with poor flowability may cause pipe blockage or material adhesion inside the hopper. In these situations, vibration devices or polished stainless steel inner walls can help improve material flow. For explosive or static-sensitive powders, anti-static hoses and explosion-proof electrical components are recommended to improve operational safety.
Vacuum loaders are widely used in automated powder and bulk material handling systems where clean, sealed, and continuous conveying is required.
Food industry.They are commonly used for transferring flour, milk powder, starch, cocoa powder, seasoning powder, and sugar into mixers, packaging machines, or storage silos without generating airborne dust.
Pharmaceutical production.Vacuum loaders help transport medicine powder, granules, and additives in enclosed pipelines to reduce contamination risks and maintain cleanroom standards.
Chemical and plastics industries.Vacuum loaders are used for conveying resin powder, PVC powder, plastic pellets, lithium battery materials, calcium carbonate, and metal powder.
Our Vacuum Loaders are sourced directly from the manufacturer, ensuring transparent and reasonable pricing. Starting at $1000, we emphasize high cost-effectiveness and stable quality. Detailed pricing is not fixed and requires precise calculation based on the customer's specific needs, taking into account factors such as the selected materials, specific model specifications, conveying parameters, and whether it is a non-standard customization. We support customization with 304/316L stainless steel, suitable for various industries including food, pharmaceuticals, chemicals, and plastics. We offer both standard models and non-standard design services. We provide free selection guidance and solution quotations, ensuring a high degree of matching between price and configuration, with no hidden costs, providing customers with stable, durable, and cost-effective vacuum loading solutions.
Dahan Machinery is a source manufacturer integrating Vacuum Loader R&D, production, sales, and service, with 18 years of experience in powder conveying equipment manufacturing and a mature technical team. The company is equipped with modern production workshops and precision machining equipment, strictly adhering to the ISO quality management system. Our main products are 304/316L stainless steel models, meeting the cleanroom and sealed material handling needs of industries such as food, pharmaceuticals, chemicals, plastics, and new energy. We insist on independent research and development and non-standard customization, providing one-stop services from solution design and manufacturing to installation, commissioning, and after-sales maintenance. With stable performance, high cost-effectiveness, and rapid response, we have won long-term recognition from global customers.
Our Vacuum Loader achieves cleanroom material handling through negative pressure sealed conveying, suitable for powder and granular materials in various industries. It features a high degree of automation, safety, and easy maintenance. It replaces manual feeding, improves conveying efficiency, ensures material quality, and improves the workshop environment, making it a core product for clean, high-speed, and intelligent material handling in modern industry.
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